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{"bugzilla": {"description": "rubygem-rack: Rack QueryParser has an unsafe default allowing params_limit bypass via semicolon-separated parameters", "id": "2398167", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2398167"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "(CWE-400|CWE-770)", "details": ["Rack is a modular Ruby web server interface. Prior to version 2.2.18, Rack::QueryParser enforces its params_limit only for parameters separated by &, while still splitting on both & and ;. As a result, attackers could use ; separators to bypass the parameter count limit and submit more parameters than intended. Applications or middleware that directly invoke Rack::QueryParser with its default configuration (no explicit delimiter) could be exposed to increased CPU and memory consumption. This can be abused as a limited denial-of-service vector. This issue has been patched in version 2.2.18.", "An unsafe default behavior in Rack::QueryParser allows bypass of the params_limit parameter count restriction when query string parameters are delimited by semicolons (;) rather than ampersands (&). The parser counts only & when enforcing the limit, while still splitting on both & and ;. As a result, an attacker can supply a crafted HTTP query using ; delimiters to exceed the intended parameter count, potentially causing performance degradation or exhaustion of resources (denial of service)."], "mitigation": {"lang": "en:us", "value": "No action is required for typical Rack applications that use the framework\u2019s default request-handling mechanisms, as these are not impacted.\nFor custom implementations or middleware that directly invoke Rack::QueryParser, administrators should:\nUse explicit delimiters: Configure QueryParser to use a specific delimiter (e.g. &) rather than accepting both & and ;.\nLimit request size and parameters: Enforce request size and parameter count limits at upstream layers (such as a web server, reverse proxy, or WAF) to prevent excessive resource consumption.\nPrefer safe APIs: Use Rack::Request or other higher-level request parsing APIs, which apply safe defaults and avoid this vulnerability."}, "name": "CVE-2025-59830", "package_state": 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"openshift-logging/log-file-metric-exporter-rhel9", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Affected", "package_name": "openshift-logging/logging-view-plugin-rhel9", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:logging:5", "fix_state": "Affected", "package_name": "openshift-logging/vector-rhel9", "product_name": "Logging Subsystem for Red Hat OpenShift"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp21/zync", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp22/zync", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp24/zync", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp25/zync", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp26/zync", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp2/zync-rhel7", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp2/zync-rhel8", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/a:redhat:red_hat_3scale_amp:2", "fix_state": "Affected", "package_name": "3scale-amp2/zync-rhel9", "product_name": "Red Hat 3scale API Management Platform 2"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "pcs", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": 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{"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "pcs", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "ruby", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "ruby:3.3/ruby", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Affected", "package_name": "rhosp13/openstack-cinder-backup", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Affected", "package_name": "rhosp13/openstack-cinder-volume", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Affected", "package_name": "rhosp13/openstack-haproxy", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Affected", "package_name": "rhosp13/openstack-manila-share", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Affected", "package_name": "rhosp13/openstack-mariadb", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Affected", "package_name": "rhosp13/openstack-ovn-northd", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Affected", "package_name": "rhosp13/openstack-rabbitmq", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Affected", "package_name": "rhosp13/openstack-redis", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "rubygem-rack", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "satellite:el8/rubygem-rack", "product_name": "Red Hat Satellite 6"}], "public_date": "2025-09-25T14:37:06Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-59830\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-59830\nhttps://github.com/rack/rack/commit/54e4ffdd5affebcb0c015cc6ae74635c0831ed71\nhttps://github.com/rack/rack/security/advisories/GHSA-625h-95r8-8xpm"], "statement": "The overall severity of this flaw is rated as High, as it can result in significant resource exhaustion under certain configurations.\nHowever, in practice, most Rack-based applications use Rack::Request, which invokes the parser safely. Therefore, the effective risk for typical deployments is considered Low.\nThis means that while the flaw is theoretically serious, the likelihood of real-world impact is limited to edge cases where the vulnerable component (Rack::QueryParser) is used directly.", "threat_severity": "Important"}