CVE-2023-20042 A vulnerability in the AnyConnect SSL VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco…
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 and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco Adaptive Security Appliance (ASA) Software | 9.19.1 | No fix stated |
| Cisco Adaptive Security Appliance (ASA) Software 9.18 | 9.18.1 → 9.18.2.7 | No fix stated |
| Cisco Adaptive Security Appliance (ASA) Software 9.17 | 9.17.1 → 9.17.1.20 | No fix stated |
| Cisco Adaptive Security Appliance (ASA) Software 9.16 | 9.16.1 → 9.16.4.9 | No fix stated |
| Cisco Firepower Threat Defense Software 7.3 | 7.3.0 → 7.3.1.1 | No fix stated |
| Cisco Firepower Threat Defense Software 7.2 | 7.2.0 → 7.2.3 | No fix stated |
| Cisco Firepower Threat Defense Software 7.1 | 7.1.0 → 7.1.0.3 | No fix stated |
| Cisco Firepower Threat Defense Software 7.0 | 7.0.0 → 7.0.5 | No fix stated |
References
- cisco-sa-asaftd-ssl-dos-kxG8mpUA sec.cloudapps.cisco.com
Timeline
- Published
- Last modified