A vulnerability in the Zone-Based Policy Firewall feature of Cisco IOS XE Software could allow an unauthenticated, remote attacker to prevent the Zone-Based Policy Firewall from correctly classifying traffic. This vulnerability exists because ICMP and UDP responder-to-initiator flows are not inspected when the Zone-Based Policy Firewall has either Unified Threat Defense (UTD) or Application Quality of Experience (AppQoE) configured. An attacker could exploit this vulnerability by attempting to send UDP or ICMP flows through the network. A successful exploit could allow the attacker to inject traffic through the Zone-Based Policy Firewall, resulting in traffic being dropped because it is incorrectly classified or in incorrect reporting figures being produced by high-speed logging (HSL).
                
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Affected Vendors & Products
References
        History
                    Thu, 07 Nov 2024 22:15:00 +0000
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 MITRE
                        MITRE
                    Status: PUBLISHED
Assigner: cisco
Published: 2021-09-23T02:25:25.516249Z
Updated: 2024-11-07T21:59:39.681Z
Reserved: 2020-11-13T00:00:00
Link: CVE-2021-1625
 Vulnrichment
                        Vulnrichment
                    Updated: 2024-08-03T16:18:11.123Z
 NVD
                        NVD
                    Status : Modified
Published: 2021-09-23T03:15:13.733
Modified: 2024-11-21T05:44:46.170
Link: CVE-2021-1625
 Redhat
                        Redhat
                    No data.