{"dataType": "CVE_RECORD", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2021-3156", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2025-10-21T23:35:29.600Z", "dateReserved": "2021-01-15T00:00:00.000Z", "datePublished": "2021-01-26T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2024-09-18T16:41:27.031Z"}, "descriptions": [{"lang": "en", "value": "Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via \"sudoedit -s\" and a command-line argument that ends with a single backslash character."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"name": "[debian-lts-announce] 20210126 [SECURITY] [DLA 2534-1] sudo security update", "tags": ["mailing-list"], "url": "https://lists.debian.org/debian-lts-announce/2021/01/msg00022.html"}, {"name": "20210126 Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list"], "url": "http://seclists.org/fulldisclosure/2021/Jan/79"}, {"name": "[oss-security] 20210126 Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list"], "url": "http://www.openwall.com/lists/oss-security/2021/01/26/3"}, {"name": "GLSA-202101-33", "tags": ["vendor-advisory"], "url": "https://security.gentoo.org/glsa/202101-33"}, {"name": "DSA-4839", "tags": ["vendor-advisory"], "url": "https://www.debian.org/security/2021/dsa-4839"}, {"name": "FEDORA-2021-2cb63d912a", "tags": ["vendor-advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/"}, {"name": "FEDORA-2021-8840cbdccd", "tags": ["vendor-advisory"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CALA5FTXIQBRRYUA2ZQNJXB6OQMAXEII/"}, {"name": "[oss-security] 20210127 Re: Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list"], "url": "http://www.openwall.com/lists/oss-security/2021/01/27/1"}, {"name": "[oss-security] 20210127 Re: Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list"], "url": "http://www.openwall.com/lists/oss-security/2021/01/27/2"}, {"name": "20210129 Sudo Privilege Escalation Vulnerability Affecting Cisco Products: January 2021", "tags": ["vendor-advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM"}, {"name": "VU#794544", "tags": ["third-party-advisory"], "url": "https://www.kb.cert.org/vuls/id/794544"}, {"name": "20210211 APPLE-SA-2021-02-09-1 macOS Big Sur 11.2.1, macOS Catalina 10.15.7 Supplemental Update, and macOS Mojave 10.14.6 Security Update 2021-002", "tags": ["mailing-list"], "url": "http://seclists.org/fulldisclosure/2021/Feb/42"}, {"name": "[oss-security] 20210215 Re: sudo: Ineffective NO_ROOT_MAILER and Baron Samedit", "tags": ["mailing-list"], "url": "http://www.openwall.com/lists/oss-security/2021/02/15/1"}, {"url": "https://www.oracle.com//security-alerts/cpujul2021.html"}, {"url": "https://www.sudo.ws/stable.html#1.9.5p2"}, {"url": "https://www.openwall.com/lists/oss-security/2021/01/26/3"}, {"url": "http://packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html"}, {"url": "https://security.netapp.com/advisory/ntap-20210128-0002/"}, {"url": "https://security.netapp.com/advisory/ntap-20210128-0001/"}, {"url": "http://packetstormsecurity.com/files/161230/Sudo-Buffer-Overflow-Privilege-Escalation.html"}, {"url": "http://packetstormsecurity.com/files/161270/Sudo-1.9.5p1-Buffer-Overflow-Privilege-Escalation.html"}, {"url": "http://packetstormsecurity.com/files/161293/Sudo-1.8.31p2-1.9.5p1-Buffer-Overflow.html"}, {"url": "https://support.apple.com/kb/HT212177"}, {"url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10348"}, {"url": "https://www.beyondtrust.com/blog/entry/security-advisory-privilege-management-for-unix-linux-pmul-basic-and-privilege-management-for-mac-pmm-affected-by-sudo-vulnerability"}, {"url": "https://www.synology.com/security/advisory/Synology_SA_21_02"}, {"name": "[oss-security] 20210914 Re: Oracle Solaris membership in the distros list", "tags": ["mailing-list"], "url": "http://www.openwall.com/lists/oss-security/2021/09/14/2"}, {"url": "https://www.oracle.com/security-alerts/cpuoct2021.html"}, {"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}, {"name": "[oss-security] 20240130 Re: CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list"], "url": "http://www.openwall.com/lists/oss-security/2024/01/30/8"}, {"name": "[oss-security] 20240130 CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list"], "url": "http://www.openwall.com/lists/oss-security/2024/01/30/6"}, {"url": "http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html"}, {"name": "20240204 CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list"], "url": "http://seclists.org/fulldisclosure/2024/Feb/3"}, {"url": "https://www.vicarius.io/vsociety/posts/sudoedit-pwned-cve-2021-3156"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T16:45:51.408Z"}, "title": "CVE Program Container", "references": [{"name": "[debian-lts-announce] 20210126 [SECURITY] [DLA 2534-1] sudo security update", "tags": ["mailing-list", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2021/01/msg00022.html"}, {"name": "20210126 Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list", "x_transferred"], "url": "http://seclists.org/fulldisclosure/2021/Jan/79"}, {"name": "[oss-security] 20210126 Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2021/01/26/3"}, {"name": "GLSA-202101-33", "tags": ["vendor-advisory", "x_transferred"], "url": "https://security.gentoo.org/glsa/202101-33"}, {"name": "DSA-4839", "tags": ["vendor-advisory", "x_transferred"], "url": "https://www.debian.org/security/2021/dsa-4839"}, {"name": "FEDORA-2021-2cb63d912a", "tags": ["vendor-advisory", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/"}, {"name": "FEDORA-2021-8840cbdccd", "tags": ["vendor-advisory", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CALA5FTXIQBRRYUA2ZQNJXB6OQMAXEII/"}, {"name": "[oss-security] 20210127 Re: Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2021/01/27/1"}, {"name": "[oss-security] 20210127 Re: Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2021/01/27/2"}, {"name": "20210129 Sudo Privilege Escalation Vulnerability Affecting Cisco Products: January 2021", "tags": ["vendor-advisory", "x_transferred"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM"}, {"name": "VU#794544", "tags": ["third-party-advisory", "x_transferred"], "url": "https://www.kb.cert.org/vuls/id/794544"}, {"name": "20210211 APPLE-SA-2021-02-09-1 macOS Big Sur 11.2.1, macOS Catalina 10.15.7 Supplemental Update, and macOS Mojave 10.14.6 Security Update 2021-002", "tags": ["mailing-list", "x_transferred"], "url": "http://seclists.org/fulldisclosure/2021/Feb/42"}, {"name": "[oss-security] 20210215 Re: sudo: Ineffective NO_ROOT_MAILER and Baron Samedit", "tags": ["mailing-list", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2021/02/15/1"}, {"url": "https://www.oracle.com//security-alerts/cpujul2021.html", "tags": ["x_transferred"]}, {"url": "https://www.sudo.ws/stable.html#1.9.5p2", "tags": ["x_transferred"]}, {"url": "https://www.openwall.com/lists/oss-security/2021/01/26/3", "tags": ["x_transferred"]}, {"url": "http://packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html", "tags": ["x_transferred"]}, {"url": "https://security.netapp.com/advisory/ntap-20210128-0002/", "tags": ["x_transferred"]}, {"url": "https://security.netapp.com/advisory/ntap-20210128-0001/", "tags": ["x_transferred"]}, {"url": "http://packetstormsecurity.com/files/161230/Sudo-Buffer-Overflow-Privilege-Escalation.html", "tags": ["x_transferred"]}, {"url": "http://packetstormsecurity.com/files/161270/Sudo-1.9.5p1-Buffer-Overflow-Privilege-Escalation.html", "tags": ["x_transferred"]}, {"url": "http://packetstormsecurity.com/files/161293/Sudo-1.8.31p2-1.9.5p1-Buffer-Overflow.html", "tags": ["x_transferred"]}, {"url": "https://support.apple.com/kb/HT212177", "tags": ["x_transferred"]}, {"url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10348", "tags": ["x_transferred"]}, {"url": "https://www.beyondtrust.com/blog/entry/security-advisory-privilege-management-for-unix-linux-pmul-basic-and-privilege-management-for-mac-pmm-affected-by-sudo-vulnerability", "tags": ["x_transferred"]}, {"url": "https://www.synology.com/security/advisory/Synology_SA_21_02", "tags": ["x_transferred"]}, {"name": "[oss-security] 20210914 Re: Oracle Solaris membership in the distros list", "tags": ["mailing-list", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2021/09/14/2"}, {"url": "https://www.oracle.com/security-alerts/cpuoct2021.html", "tags": ["x_transferred"]}, {"url": "https://www.oracle.com/security-alerts/cpuapr2022.html", "tags": ["x_transferred"]}, {"name": "[oss-security] 20240130 Re: CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2024/01/30/8"}, {"name": "[oss-security] 20240130 CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2024/01/30/6"}, {"url": "http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html", "tags": ["x_transferred"]}, {"name": "20240204 CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list", "x_transferred"], "url": "http://seclists.org/fulldisclosure/2024/Feb/3"}]}, {"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2021-3156", "role": "CISA Coordinator", "options": [{"Exploitation": "active"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-02-03T15:43:52.658146Z"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2022-04-06", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3156"}}}], "references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3156", "tags": ["government-resource"]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-193", "description": "CWE-193 Off-by-one Error"}]}], "timeline": [{"time": "2022-04-06T00:00:00+00:00", "lang": "en", "value": "CVE-2021-3156 added to CISA KEV"}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-21T23:35:29.600Z"}}]}, "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2021/01/msg00022.html", "name": "[debian-lts-announce] 20210126 [SECURITY] [DLA 2534-1] sudo security update", "tags": ["mailing-list", "x_transferred"]}, {"url": "http://seclists.org/fulldisclosure/2021/Jan/79", "name": "20210126 Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list", "x_transferred"]}, {"url": "http://www.openwall.com/lists/oss-security/2021/01/26/3", "name": "[oss-security] 20210126 Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list", "x_transferred"]}, {"url": "https://security.gentoo.org/glsa/202101-33", "name": "GLSA-202101-33", "tags": ["vendor-advisory", "x_transferred"]}, {"url": "https://www.debian.org/security/2021/dsa-4839", "name": "DSA-4839", "tags": ["vendor-advisory", "x_transferred"]}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/", "name": "FEDORA-2021-2cb63d912a", "tags": ["vendor-advisory", "x_transferred"]}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CALA5FTXIQBRRYUA2ZQNJXB6OQMAXEII/", "name": "FEDORA-2021-8840cbdccd", "tags": ["vendor-advisory", "x_transferred"]}, {"url": "http://www.openwall.com/lists/oss-security/2021/01/27/1", "name": "[oss-security] 20210127 Re: Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list", "x_transferred"]}, {"url": "http://www.openwall.com/lists/oss-security/2021/01/27/2", "name": "[oss-security] 20210127 Re: Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list", "x_transferred"]}, {"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM", "name": "20210129 Sudo Privilege Escalation Vulnerability Affecting Cisco Products: January 2021", "tags": ["vendor-advisory", "x_transferred"]}, {"url": "https://www.kb.cert.org/vuls/id/794544", "name": "VU#794544", "tags": ["third-party-advisory", "x_transferred"]}, {"url": "http://seclists.org/fulldisclosure/2021/Feb/42", "name": "20210211 APPLE-SA-2021-02-09-1 macOS Big Sur 11.2.1, macOS Catalina 10.15.7 Supplemental Update, and macOS Mojave 10.14.6 Security Update 2021-002", "tags": ["mailing-list", "x_transferred"]}, {"url": "http://www.openwall.com/lists/oss-security/2021/02/15/1", "name": "[oss-security] 20210215 Re: sudo: Ineffective NO_ROOT_MAILER and Baron Samedit", "tags": ["mailing-list", "x_transferred"]}, {"url": "https://www.oracle.com//security-alerts/cpujul2021.html", "tags": ["x_transferred"]}, {"url": "https://www.sudo.ws/stable.html#1.9.5p2", "tags": ["x_transferred"]}, {"url": "https://www.openwall.com/lists/oss-security/2021/01/26/3", "tags": ["x_transferred"]}, {"url": "http://packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html", "tags": ["x_transferred"]}, {"url": "https://security.netapp.com/advisory/ntap-20210128-0002/", "tags": ["x_transferred"]}, {"url": "https://security.netapp.com/advisory/ntap-20210128-0001/", "tags": ["x_transferred"]}, {"url": "http://packetstormsecurity.com/files/161230/Sudo-Buffer-Overflow-Privilege-Escalation.html", "tags": ["x_transferred"]}, {"url": "http://packetstormsecurity.com/files/161270/Sudo-1.9.5p1-Buffer-Overflow-Privilege-Escalation.html", "tags": ["x_transferred"]}, {"url": "http://packetstormsecurity.com/files/161293/Sudo-1.8.31p2-1.9.5p1-Buffer-Overflow.html", "tags": ["x_transferred"]}, {"url": "https://support.apple.com/kb/HT212177", "tags": ["x_transferred"]}, {"url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10348", "tags": ["x_transferred"]}, {"url": "https://www.beyondtrust.com/blog/entry/security-advisory-privilege-management-for-unix-linux-pmul-basic-and-privilege-management-for-mac-pmm-affected-by-sudo-vulnerability", "tags": ["x_transferred"]}, {"url": "https://www.synology.com/security/advisory/Synology_SA_21_02", "tags": ["x_transferred"]}, {"url": "http://www.openwall.com/lists/oss-security/2021/09/14/2", "name": "[oss-security] 20210914 Re: Oracle Solaris membership in the distros list", "tags": ["mailing-list", "x_transferred"]}, {"url": "https://www.oracle.com/security-alerts/cpuoct2021.html", "tags": ["x_transferred"]}, {"url": "https://www.oracle.com/security-alerts/cpuapr2022.html", "tags": ["x_transferred"]}, {"url": "http://www.openwall.com/lists/oss-security/2024/01/30/8", "name": "[oss-security] 20240130 Re: CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list", "x_transferred"]}, {"url": "http://www.openwall.com/lists/oss-security/2024/01/30/6", "name": "[oss-security] 20240130 CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list", "x_transferred"]}, {"url": "http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html", "tags": ["x_transferred"]}, {"url": "http://seclists.org/fulldisclosure/2024/Feb/3", "name": "20240204 CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list", "x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T16:45:51.408Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2021-3156", "role": "CISA Coordinator", "options": [{"Exploitation": "active"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-02-03T15:43:52.658146Z"}}}, {"other": {"type": "kev", "content": {"dateAdded": "2022-04-06", "reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3156"}}}], "timeline": [{"lang": "en", "time": "2022-04-06T00:00:00+00:00", "value": "CVE-2021-3156 added to CISA KEV"}], "references": [{"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3156", "tags": ["government-resource"]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-193", "description": "CWE-193 Off-by-one Error"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-03T16:16:14.448Z"}}], "cna": {"affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "references": [{"url": "https://lists.debian.org/debian-lts-announce/2021/01/msg00022.html", "name": "[debian-lts-announce] 20210126 [SECURITY] [DLA 2534-1] sudo security update", "tags": ["mailing-list"]}, {"url": "http://seclists.org/fulldisclosure/2021/Jan/79", "name": "20210126 Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list"]}, {"url": "http://www.openwall.com/lists/oss-security/2021/01/26/3", "name": "[oss-security] 20210126 Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list"]}, {"url": "https://security.gentoo.org/glsa/202101-33", "name": "GLSA-202101-33", "tags": ["vendor-advisory"]}, {"url": "https://www.debian.org/security/2021/dsa-4839", "name": "DSA-4839", "tags": ["vendor-advisory"]}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/", "name": "FEDORA-2021-2cb63d912a", "tags": ["vendor-advisory"]}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CALA5FTXIQBRRYUA2ZQNJXB6OQMAXEII/", "name": "FEDORA-2021-8840cbdccd", "tags": ["vendor-advisory"]}, {"url": "http://www.openwall.com/lists/oss-security/2021/01/27/1", "name": "[oss-security] 20210127 Re: Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list"]}, {"url": "http://www.openwall.com/lists/oss-security/2021/01/27/2", "name": "[oss-security] 20210127 Re: Baron Samedit: Heap-based buffer overflow in Sudo (CVE-2021-3156)", "tags": ["mailing-list"]}, {"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM", "name": "20210129 Sudo Privilege Escalation Vulnerability Affecting Cisco Products: January 2021", "tags": ["vendor-advisory"]}, {"url": "https://www.kb.cert.org/vuls/id/794544", "name": "VU#794544", "tags": ["third-party-advisory"]}, {"url": "http://seclists.org/fulldisclosure/2021/Feb/42", "name": "20210211 APPLE-SA-2021-02-09-1 macOS Big Sur 11.2.1, macOS Catalina 10.15.7 Supplemental Update, and macOS Mojave 10.14.6 Security Update 2021-002", "tags": ["mailing-list"]}, {"url": "http://www.openwall.com/lists/oss-security/2021/02/15/1", "name": "[oss-security] 20210215 Re: sudo: Ineffective NO_ROOT_MAILER and Baron Samedit", "tags": ["mailing-list"]}, {"url": "https://www.oracle.com//security-alerts/cpujul2021.html"}, {"url": "https://www.sudo.ws/stable.html#1.9.5p2"}, {"url": "https://www.openwall.com/lists/oss-security/2021/01/26/3"}, {"url": "http://packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html"}, {"url": "https://security.netapp.com/advisory/ntap-20210128-0002/"}, {"url": "https://security.netapp.com/advisory/ntap-20210128-0001/"}, {"url": "http://packetstormsecurity.com/files/161230/Sudo-Buffer-Overflow-Privilege-Escalation.html"}, {"url": "http://packetstormsecurity.com/files/161270/Sudo-1.9.5p1-Buffer-Overflow-Privilege-Escalation.html"}, {"url": "http://packetstormsecurity.com/files/161293/Sudo-1.8.31p2-1.9.5p1-Buffer-Overflow.html"}, {"url": "https://support.apple.com/kb/HT212177"}, {"url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10348"}, {"url": "https://www.beyondtrust.com/blog/entry/security-advisory-privilege-management-for-unix-linux-pmul-basic-and-privilege-management-for-mac-pmm-affected-by-sudo-vulnerability"}, {"url": "https://www.synology.com/security/advisory/Synology_SA_21_02"}, {"url": "http://www.openwall.com/lists/oss-security/2021/09/14/2", "name": "[oss-security] 20210914 Re: Oracle Solaris membership in the distros list", "tags": ["mailing-list"]}, {"url": "https://www.oracle.com/security-alerts/cpuoct2021.html"}, {"url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}, {"url": "http://www.openwall.com/lists/oss-security/2024/01/30/8", "name": "[oss-security] 20240130 Re: CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list"]}, {"url": "http://www.openwall.com/lists/oss-security/2024/01/30/6", "name": "[oss-security] 20240130 CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list"]}, {"url": "http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html"}, {"url": "http://seclists.org/fulldisclosure/2024/Feb/3", "name": "20240204 CVE-2023-6246: Heap-based buffer overflow in the glibc's syslog()", "tags": ["mailing-list"]}, {"url": "https://www.vicarius.io/vsociety/posts/sudoedit-pwned-cve-2021-3156"}], "descriptions": [{"lang": "en", "value": "Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via \"sudoedit -s\" and a command-line argument that ends with a single backslash character."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "text", "description": "n/a"}]}], "providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2024-09-18T16:41:27.031Z"}}}, "cveMetadata": {"cveId": "CVE-2021-3156", "state": "PUBLISHED", "dateUpdated": "2025-10-21T23:35:29.600Z", "dateReserved": "2021-01-15T00:00:00.000Z", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "datePublished": "2021-01-26T00:00:00.000Z", "assignerShortName": "mitre"}, "dataVersion": "5.1"}

{"cisaActionDue": "2022-04-27", "cisaExploitAdd": "2022-04-06", "cisaRequiredAction": "Apply updates per vendor instructions.", "cisaVulnerabilityName": "Sudo Heap-Based Buffer Overflow Vulnerability", "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:*", "matchCriteriaId": "ED707F57-531B-4066-AFF0-7239F87B6BF5", "versionEndExcluding": "1.8.32", "versionStartIncluding": "1.8.2", "vulnerable": true}, {"criteria": "cpe:2.3:a:sudo_project:sudo:*:*:*:*:*:*:*:*", "matchCriteriaId": "38FC37F7-DE89-4078-BB55-EBFBF3A2D780", "versionEndExcluding": "1.9.5", "versionStartIncluding": "1.9.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:sudo_project:sudo:1.9.5:-:*:*:*:*:*:*", "matchCriteriaId": "436F3F62-FBA8-44CB-A5A9-AA4D7E0F9A09", "vulnerable": true}, {"criteria": "cpe:2.3:a:sudo_project:sudo:1.9.5:patch1:*:*:*:*:*:*", "matchCriteriaId": "3C21138F-EB70-4AAE-9F45-C75CCE59BA89", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*", "matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*", "matchCriteriaId": "3A756737-1CC4-42C2-A4DF-E1C893B4E2D5", "vulnerable": true}, {"criteria": "cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*", "matchCriteriaId": "5C2089EE-5D7F-47EC-8EA5-0F69790564C4", "vulnerable": true}, {"criteria": "cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:*", "matchCriteriaId": "A3C19813-E823-456A-B1CE-EC0684CE1953", "vulnerable": true}, {"criteria": "cpe:2.3:a:netapp:oncommand_unified_manager_core_package:-:*:*:*:*:*:*:*", "matchCriteriaId": "0A4D418D-B526-46B9-B439-E1963BF88C0A", "vulnerable": true}, {"criteria": "cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:*", "matchCriteriaId": "E7CF3019-975D-40BB-A8A4-894E62BD3797", "vulnerable": true}, {"criteria": "cpe:2.3:a:netapp:ontap_tools:9:*:*:*:*:vmware_vsphere:*:*", "matchCriteriaId": "C2D814BE-93EC-42EF-88C5-EA7E7DF07BE5", "vulnerable": true}, {"criteria": "cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:*", "matchCriteriaId": "A6E9EF0C-AFA8-4F7B-9FDC-1E0F7C26E737", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mcafee:web_gateway:8.2.17:*:*:*:*:*:*:*", "matchCriteriaId": "D2039589-B543-49B6-AC5F-74C4253B416D", "vulnerable": true}, {"criteria": "cpe:2.3:a:mcafee:web_gateway:9.2.8:*:*:*:*:*:*:*", "matchCriteriaId": "1E014E1E-0013-434F-9C59-178DAC089687", "vulnerable": true}, {"criteria": "cpe:2.3:a:mcafee:web_gateway:10.0.4:*:*:*:*:*:*:*", "matchCriteriaId": "3CE836FD-3453-4277-BC18-A4868C183F42", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:synology:diskstation_manager_unified_controller:3.0:*:*:*:*:*:*:*", "matchCriteriaId": "DA272C48-259B-4402-BB75-552B6983CD43", "vulnerable": true}, {"criteria": "cpe:2.3:o:synology:diskstation_manager:6.2:*:*:*:*:*:*:*", "matchCriteriaId": "D9685B12-824F-42AD-B87C-6E7A78BB7FA5", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:synology:skynas_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "53EF087B-D7E9-4F9A-803A-B0260C495C67", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:synology:skynas:-:*:*:*:*:*:*:*", "matchCriteriaId": "D0A88A76-CF8A-4D29-B480-E5317219072D", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:synology:vs960hd_firmware:-:*:*:*:*:*:*:*", "matchCriteriaId": "3D0C5120-B961-440F-B454-584BC54B549C", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:synology:vs960hd:-:*:*:*:*:*:*:*", "matchCriteriaId": "1CCBDFF9-AF42-4681-879B-CF789EBAD130", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:beyondtrust:privilege_management_for_mac:*:*:*:*:*:*:*:*", "matchCriteriaId": "38A18800-4BB0-46A1-BD9D-78EC7A07E7B9", "versionEndExcluding": "21.1.1", "vulnerable": true}, {"criteria": "cpe:2.3:a:beyondtrust:privilege_management_for_unix\\/linux:*:*:*:*:basic:*:*:*", "matchCriteriaId": "48DC5B58-0E31-480E-BF05-787287DFF42B", "versionEndExcluding": "10.3.2-10", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:oracle:micros_compact_workstation_3_firmware:310:*:*:*:*:*:*:*", "matchCriteriaId": "1CE3FF32-E472-4E90-9DE5-803AD6FD9E27", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:oracle:micros_compact_workstation_3:-:*:*:*:*:*:*:*", "matchCriteriaId": "7DA4F0AD-B8A4-4EB9-A220-FEEC9B147D3C", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:oracle:micros_es400_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "9AA5297B-05DF-4A23-B684-60F2107339B0", "versionEndIncluding": "410", "versionStartIncluding": "400", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:oracle:micros_es400:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2BBD07A-4731-41D1-AB66-77082951D99C", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:oracle:micros_kitchen_display_system_firmware:210:*:*:*:*:*:*:*", "matchCriteriaId": "57E6A365-F04F-4991-888F-D8E9391A9857", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:oracle:micros_kitchen_display_system:-:*:*:*:*:*:*:*", "matchCriteriaId": "D1424AF8-9337-427B-B6FA-C5EB8B201FB7", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:oracle:micros_workstation_5a_firmware:5a:*:*:*:*:*:*:*", "matchCriteriaId": "C78FDD3A-F241-4172-8725-7D51D8E705E7", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:oracle:micros_workstation_5a:-:*:*:*:*:*:*:*", "matchCriteriaId": "F607BA3F-246F-42BE-9EBD-A2CAE098C0C2", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:oracle:micros_workstation_6_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "D59535D6-8D64-4B8F-BC1B-5846600C9F81", "versionEndIncluding": "655", "versionStartIncluding": "610", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:oracle:micros_workstation_6:-:*:*:*:*:*:*:*", "matchCriteriaId": "82A66154-5DF0-43FF-9F70-1221D3E6F919", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:oracle:communications_performance_intelligence_center:*:*:*:*:*:*:*:*", "matchCriteriaId": "977CA754-6CE0-4FCB-9683-D81B7A15449D", "versionEndIncluding": "10.3.0.2.1", "versionStartIncluding": "10.3.0.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:communications_performance_intelligence_center:*:*:*:*:*:*:*:*", "matchCriteriaId": "29A3F7EF-2A69-427F-9F75-DDDBEE34BA2B", "versionEndIncluding": "10.4.0.3.1", "versionStartIncluding": "10.4.0.1.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:oracle:tekelec_platform_distribution:*:*:*:*:*:*:*:*", "matchCriteriaId": "26F05F85-7458-4C8F-B93F-93C92E506A40", "versionEndIncluding": "7.7.1", "versionStartIncluding": "7.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via \"sudoedit -s\" and a command-line argument that ends with a single backslash character."}, {"lang": "es", "value": "Sudo versiones anteriores a 1.9.5p2 contiene un error de desbordamiento que puede resultar en un desbordamiento de b\u00fafer basado en la pila, lo que permite la escalada de privilegios a root a trav\u00e9s de \"sudoedit -s\" y un argumento de l\u00ednea de comandos que termina con un solo car\u00e1cter de barra invertida"}], "id": "CVE-2021-3156", "lastModified": "2025-10-22T00:17:43.797", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2021-01-26T21:15:12.987", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/161230/Sudo-Buffer-Overflow-Privilege-Escalation.html"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/161270/Sudo-1.9.5p1-Buffer-Overflow-Privilege-Escalation.html"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/161293/Sudo-1.8.31p2-1.9.5p1-Buffer-Overflow.html"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2021/Feb/42"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2021/Jan/79"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2024/Feb/3"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/01/26/3"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/01/27/1"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/01/27/2"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/02/15/1"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/09/14/2"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Mailing List"], "url": "http://www.openwall.com/lists/oss-security/2024/01/30/6"}, {"source": "cve@mitre.org", "tags": ["Mailing List"], "url": "http://www.openwall.com/lists/oss-security/2024/01/30/8"}, {"source": "cve@mitre.org", "tags": ["Broken Link", "Third Party Advisory"], "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10348"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/01/msg00022.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Release Notes"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CALA5FTXIQBRRYUA2ZQNJXB6OQMAXEII/"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Release Notes"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202101-33"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20210128-0001/"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20210128-0002/"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://support.apple.com/kb/HT212177"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://www.beyondtrust.com/blog/entry/security-advisory-privilege-management-for-unix-linux-pmul-basic-and-privilege-management-for-mac-pmm-affected-by-sudo-vulnerability"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-4839"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.kb.cert.org/vuls/id/794544"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2021/01/26/3"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com//security-alerts/cpujul2021.html"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"}, {"source": "cve@mitre.org", "tags": ["Release Notes"], "url": "https://www.sudo.ws/stable.html#1.9.5p2"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://www.synology.com/security/advisory/Synology_SA_21_02"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://www.vicarius.io/vsociety/posts/sudoedit-pwned-cve-2021-3156"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/161160/Sudo-Heap-Based-Buffer-Overflow.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/161230/Sudo-Buffer-Overflow-Privilege-Escalation.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/161270/Sudo-1.9.5p1-Buffer-Overflow-Privilege-Escalation.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/161293/Sudo-1.8.31p2-1.9.5p1-Buffer-Overflow.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory", "VDB Entry"], "url": "http://packetstormsecurity.com/files/176932/glibc-syslog-Heap-Based-Buffer-Overflow.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2021/Feb/42"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2021/Jan/79"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2024/Feb/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/01/26/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/01/27/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/01/27/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/02/15/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2021/09/14/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List"], "url": "http://www.openwall.com/lists/oss-security/2024/01/30/6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "http://www.openwall.com/lists/oss-security/2024/01/30/8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Broken Link", "Third Party Advisory"], "url": "https://kc.mcafee.com/corporate/index?page=content&id=SB10348"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/01/msg00022.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Release Notes"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CALA5FTXIQBRRYUA2ZQNJXB6OQMAXEII/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Release Notes"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LHXK6ICO5AYLGFK2TAX5MZKUXTUKWOJY/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202101-33"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20210128-0001/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.netapp.com/advisory/ntap-20210128-0002/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://support.apple.com/kb/HT212177"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sudo-privesc-jan2021-qnYQfcM"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.beyondtrust.com/blog/entry/security-advisory-privilege-management-for-unix-linux-pmul-basic-and-privilege-management-for-mac-pmm-affected-by-sudo-vulnerability"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2021/dsa-4839"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "US Government Resource"], "url": "https://www.kb.cert.org/vuls/id/794544"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2021/01/26/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com//security-alerts/cpujul2021.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuapr2022.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes"], "url": "https://www.sudo.ws/stable.html#1.9.5p2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.synology.com/security/advisory/Synology_SA_21_02"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-3156"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-193"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-193"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2021:0227", "cpe": "cpe:/o:redhat:rhel_els:6", "package": "sudo-0:1.8.6p3-29.el6_10.4", "product_name": "Red Hat Enterprise Linux 6 Extended Lifecycle Support", "release_date": "2021-01-26T00:00:00Z"}, {"advisory": "RHSA-2021:0221", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "sudo-0:1.8.23-10.el7_9.1", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2021-01-27T00:00:00Z"}, {"advisory": "RHSA-2021:0226", "cpe": "cpe:/o:redhat:rhel_aus:7.2", "package": "sudo-0:1.8.6p7-17.el7_2.3", "product_name": "Red Hat Enterprise Linux 7.2 Advanced Update Support", "release_date": "2021-01-26T00:00:00Z"}, {"advisory": "RHSA-2021:0225", "cpe": "cpe:/o:redhat:rhel_aus:7.3", "package": "sudo-0:1.8.6p7-23.el7_3.3", "product_name": "Red Hat Enterprise Linux 7.3 Advanced Update Support", "release_date": "2021-01-26T00:00:00Z"}, {"advisory": "RHSA-2021:0224", "cpe": "cpe:/o:redhat:rhel_aus:7.4", "package": "sudo-0:1.8.19p2-12.el7_4.2", "product_name": "Red Hat Enterprise Linux 7.4 Advanced Update Support", "release_date": "2021-01-26T00:00:00Z"}, {"advisory": "RHSA-2021:0224", "cpe": "cpe:/o:redhat:rhel_tus:7.4", "package": "sudo-0:1.8.19p2-12.el7_4.2", "product_name": "Red Hat Enterprise Linux 7.4 Telco Extended Update Support", "release_date": "2021-01-26T00:00:00Z"}, {"advisory": "RHSA-2021:0224", "cpe": "cpe:/o:redhat:rhel_e4s:7.4", "package": "sudo-0:1.8.19p2-12.el7_4.2", "product_name": "Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions", "release_date": "2021-01-26T00:00:00Z"}, {"advisory": "RHSA-2021:0223", "cpe": "cpe:/o:redhat:rhel_eus:7.6", "package": "sudo-0:1.8.23-3.el7_6.2", "product_name": "Red Hat Enterprise Linux 7.6 Extended Update Support", "release_date": "2021-01-27T00:00:00Z"}, {"advisory": "RHSA-2021:0222", "cpe": "cpe:/o:redhat:rhel_eus:7.7", "package": "sudo-0:1.8.23-4.el7_7.3", "product_name": "Red Hat Enterprise Linux 7.7 Extended Update Support", "release_date": "2021-01-26T00:00:00Z"}, {"advisory": "RHSA-2021:0218", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "sudo-0:1.8.29-6.el8_3.1", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-01-26T00:00:00Z"}, {"advisory": "RHSA-2021:0220", "cpe": "cpe:/o:redhat:rhel_eus:8.1", "package": "sudo-0:1.8.25p1-8.el8_1.2", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2021-01-26T00:00:00Z"}, {"advisory": "RHSA-2021:0219", "cpe": "cpe:/o:redhat:rhel_eus:8.2", "package": "sudo-0:1.8.29-5.el8_2.1", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2021-01-26T00:00:00Z"}, {"advisory": "RHSA-2021:0395", "cpe": "cpe:/o:redhat:enterprise_linux:7::hypervisor", "package": "redhat-virtualization-host-0:4.3.13-20210127.0.el7_9", "product_name": "Red Hat Virtualization 4 for Red Hat Enterprise Linux 7", "release_date": "2021-02-03T00:00:00Z"}, {"advisory": "RHSA-2021:0401", "cpe": "cpe:/o:redhat:rhev_hypervisor:4.4::el8", "package": "redhat-virtualization-host-0:4.4.4-20210201.0.el8_3", "product_name": "Red Hat Virtualization 4 for Red Hat Enterprise Linux 8", "release_date": "2021-02-03T00:00:00Z"}], "bugzilla": {"description": "sudo: Heap buffer overflow in argument parsing", "id": "1917684", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1917684"}, "csaw": true, "cvss3": {"cvss3_base_score": "7.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-122", "details": ["Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via \"sudoedit -s\" and a command-line argument that ends with a single backslash character.", "A flaw was found in sudo. A heap-based buffer overflow was found in the way sudo parses command line arguments. This flaw is exploitable by any local user who can execute the sudo command (by default, any local user can execute sudo) without authentication. Successful exploitation of this flaw could lead to privilege escalation. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability."], "mitigation": {"lang": "en:us", "value": "Red Hat Product Security strongly recommends customers to update to fixed sudo packages once they are available. For customers who cannot update immediately, the following interim partial mitigation using systemtap is suggested:\n1. Install required systemtap packages and dependencies: \n```\nsystemtap yum-utils kernel-devel-\"$(uname -r)\"\n```\nThen for RHEL 7 install kernel debuginfo, using:\n```\ndebuginfo-install -y kernel-\"$(uname -r)\" \n```\nThen for RHEL 8 & 6 install sudo debuginfo, using:\n```\ndebuginfo-install sudo\n```\n2. Create the following systemtap script: (call the file as sudoedit-block.stap)\n```\nprobe process(\"/usr/bin/sudo\").function(\"main\") {\ncommand = cmdline_args(0,0,\"\");\nif (isinstr(command, \"edit\")) {\nraise(9);\n}\n}\n```\n3. Install the script using the following command: (using root)\n```\n# nohup stap -g sudoedit-block.stap &\n```\n(This should output the PID number of the systemtap script)\nThis script will cause the vulnerable sudoedit binary to stop working. The sudo command will still work as usual.\nThe above change does not persist across reboots and must be applied after each reboot.\nPlease consult How to make a systemtap kernel module load persistently across reboots? (https://access.redhat.com/solutions/5752521) to learn how to\nturn this into a service managed by initd. \n4. Once the new fixed packages are installed, the systemtap script can be removed by killing the systemtap process. For example, by using:\n```\n# kill -s SIGTERM 7590\n```\n(where 7590 is the PID of the systemtap process)"}, "name": "CVE-2021-3156", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "sudo", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "sudo", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-01-26T18:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-3156\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-3156\nhttps://www.qualys.com/2021/01/26/cve-2021-3156/baron-samedit-heap-based-overflow-sudo.txt\nhttps://www.sudo.ws/alerts/unescape_overflow.html\nhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog"], "statement": "This flaw does not affect the versions of sudo shipped with Red Hat Enterprise Linux 5, because the vulnerable code was not present in these versions.", "threat_severity": "Important"}