Description
A vulnerability in the AnyConnect SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to an implementation error within the SSL/TLS session handling process that can prevent the release of a session handler under specific conditions. An attacker could exploit this vulnerability by sending crafted SSL/TLS traffic to an affected device, increasing the probability of session handler leaks. A successful exploit could allow the attacker to eventually deplete the available session handler pool, preventing new sessions from being established and causing a DoS condition.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Cisco Cisco Adaptive Security Appliance (ASA) Software
9.16.1affected9.16.1.28affected9.16.2affected9.16.2.3affected9.16.2.7affected9.16.2.11affected9.16.2.13affected9.16.2.14affected9.16.3affected9.16.3.3affected9.16.3.14affected9.16.3.15affected9.16.3.19affected9.16.3.23affected9.16.4affected9.16.4.9affected9.17.1affected9.17.1.7affected9.17.1.9affected9.17.1.10affected9.17.1.11affected9.17.1.13affected9.17.1.15affected9.17.1.20affected9.18.1affected9.18.1.3affected9.18.2affected9.18.2.5affected9.18.2.7affected9.19.1affected
Cisco Cisco Firepower Threat Defense Software
7.0.0affected7.0.0.1affected7.0.1affected7.0.1.1affected7.0.2affected7.0.2.1affected7.0.3affected7.0.4affected7.0.5affected7.1.0affected7.1.0.1affected7.1.0.2affected7.1.0.3affected7.2.0affected7.2.0.1affected7.2.1affected7.2.2affected7.2.3affected7.3.0affected7.3.1affected7.3.1.1affected