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.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firepower_threat_defense | Cisco | 7.0.0 (including) | 7.0.0 (including) |
| Firepower_threat_defense | Cisco | 7.0.0.1 (including) | 7.0.0.1 (including) |
| Firepower_threat_defense | Cisco | 7.0.1 (including) | 7.0.1 (including) |
| Firepower_threat_defense | Cisco | 7.0.1.1 (including) | 7.0.1.1 (including) |
| Firepower_threat_defense | Cisco | 7.0.2 (including) | 7.0.2 (including) |
| Firepower_threat_defense | Cisco | 7.0.2.1 (including) | 7.0.2.1 (including) |
| Firepower_threat_defense | Cisco | 7.0.3 (including) | 7.0.3 (including) |
| Firepower_threat_defense | Cisco | 7.0.4 (including) | 7.0.4 (including) |
| Firepower_threat_defense | Cisco | 7.0.5 (including) | 7.0.5 (including) |
| Firepower_threat_defense | Cisco | 7.1.0 (including) | 7.1.0 (including) |
| Firepower_threat_defense | Cisco | 7.1.0.1 (including) | 7.1.0.1 (including) |
| Firepower_threat_defense | Cisco | 7.1.0.2 (including) | 7.1.0.2 (including) |
| Firepower_threat_defense | Cisco | 7.1.0.3 (including) | 7.1.0.3 (including) |
| Firepower_threat_defense | Cisco | 7.2.0 (including) | 7.2.0 (including) |
| Firepower_threat_defense | Cisco | 7.2.0.1 (including) | 7.2.0.1 (including) |
| Firepower_threat_defense | Cisco | 7.2.1 (including) | 7.2.1 (including) |
| Firepower_threat_defense | Cisco | 7.2.2 (including) | 7.2.2 (including) |
| Firepower_threat_defense | Cisco | 7.2.3 (including) | 7.2.3 (including) |
| Firepower_threat_defense | Cisco | 7.3.0 (including) | 7.3.0 (including) |
| Firepower_threat_defense | Cisco | 7.3.1 (including) | 7.3.1 (including) |
| Firepower_threat_defense | Cisco | 7.3.1.1 (including) | 7.3.1.1 (including) |