CVE-2020-3555

A vulnerability in the SIP inspection process of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a crash and reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to a watchdog timeout and crash during the cleanup of threads that are associated with a SIP connection that is being deleted from the connection list. An attacker could exploit this vulnerability by sending a high rate of crafted SIP traffic through an affected device. A successful exploit could allow the attacker to cause a watchdog timeout and crash, resulting in a crash and reload of the affected device.

• cisco adaptive security appliance (< 9.6.4.43) • cisco secure firewall threat defense (<= 6.2.2) • cisco secure firewall threat defense (>= 6.3.0 < 6.3.0.6) • cisco secure firewall threat defense (>= 6.4.0 < 6.4.0.10) • cisco secure firewall threat defense (>= 6.5.0 < 6.5.0.5) • cisco secure firewall threat defense 6.6.0 • cisco adaptive security appliance software (>= 9.7.0 < 9.8.4.24) • cisco adaptive security appliance software (>= 9.9.0 < 9.9.2.80) • cisco adaptive security appliance software (>= 9.10.0 < 9.10.1.43) • cisco adaptive security appliance software (>= 9.12.0 < 9.12.4.2) • cisco adaptive security appliance software (>= 9.13.0 < 9.13.1.13) • cisco adaptive security appliance software (>= 9.14.0 < 9.14.1.19)