CVE-2020-3191

A vulnerability in DNS over IPv6 packet processing for Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to unexpectedly reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper length validation of a field in an IPv6 DNS packet. An attacker could exploit this vulnerability by sending a crafted DNS query over IPv6, which traverses the affected device. An exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. This vulnerability is specific to DNS over IPv6 traffic only.

• cisco secure firewall threat defense (>= 6.2.3 < 6.2.3.16) • cisco secure firewall threat defense (>= 6.3.0 < 6.3.0.6) • cisco secure firewall threat defense (>= 6.4.0 < 6.4.0.6) • cisco asa 5505 firmware 9.4\(1\) • cisco asa 5505 firmware 96.4\(0.42\) • cisco asa 5510 firmware 9.4\(1\) • cisco asa 5510 firmware 96.4\(0.42\) • cisco asa 5512-x firmware 9.4\(1\) • cisco asa 5512-x firmware 96.4\(0.42\) • cisco asa 5515-x firmware 9.4\(1\) • cisco asa 5515-x firmware 96.4\(0.42\) • cisco asa 5520 firmware 9.4\(1\) • cisco asa 5520 firmware 96.4\(0.42\) • cisco asa 5525-x firmware 9.4\(1\) • cisco asa 5525-x firmware 96.4\(0.42\) • cisco asa 5540 firmware 9.4\(1\) • cisco asa 5540 firmware 96.4\(0.42\) • cisco asa 5545-x firmware 9.4\(1\) • cisco asa 5545-x firmware 96.4\(0.42\) • cisco asa 5550 firmware 9.4\(1\) • cisco asa 5550 firmware 96.4\(0.42\) • cisco asa 5555-x firmware 9.4\(1\) • cisco asa 5555-x firmware 96.4\(0.42\) • cisco asa 5580 firmware 9.4\(1\) • cisco asa 5580 firmware 96.4\(0.42\) • cisco asa 5585-x firmware 9.4\(1\) • cisco asa 5585-x firmware 96.4\(0.42\) • cisco adaptive security appliance software (>= 9.6 < 9.6.4.36) • cisco adaptive security appliance software (>= 9.8 < 9.8.4.12) • cisco adaptive security appliance software (>= 9.9 < 9.9.2.66) • cisco adaptive security appliance software (>= 9.10 < 9.10.1.37) • cisco adaptive security appliance software (>= 9.12 < 9.12.2.9)