CVE-2022-20760

A vulnerability in the DNS inspection handler of Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service condition (DoS) on an affected device. This vulnerability is due to a lack of proper processing of incoming requests. An attacker could exploit this vulnerability by sending crafted DNS requests at a high rate to an affected device. A successful exploit could allow the attacker to cause the device to stop responding, resulting in a DoS condition.

• cisco secure firewall threat defense (< 6.4.0.15) • cisco secure firewall threat defense (>= 6.5.0 < 6.6.5.2) • cisco secure firewall threat defense (>= 7.0.0 < 7.0.2) • cisco secure firewall threat defense 7.1.0 • cisco adaptive security appliance software (< 9.12.4.38) • cisco adaptive security appliance software (>= 9.13.0 < 9.14.4) • cisco adaptive security appliance software (>= 9.15.0 < 9.15.1.21) • cisco adaptive security appliance software (>= 9.16.0 < 9.16.2.14) • cisco adaptive security appliance software (>= 9.17.0 < 9.17.1.7)