CVE-2020-3572
A vulnerability in the SSL/TLS session handler of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allo…
Impact
A vulnerability in the SSL/TLS session handler 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. The vulnerability is due to a memory leak when closing SSL/TLS connections in a specific state. An attacker could exploit this vulnerability by establishing several SSL/TLS sessions and ensuring they are closed under certain conditions. A successful exploit could allow the attacker to exhaust memory resources in the affected device, which would prevent it from processing new SSL/TLS connections, resulting in a DoS. Manual intervention is required to recover an affected device.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Adaptive Security Appliance | before 9.6 |
| Cisco | Secure Firewall Threat Defense | before 6.3.0.6 from 6.4.0 before 6.4.0.10 from 6.5.0 before 6.6.1 |
| Cisco | Adaptive Security Appliance Software | from 9.8.0 before 9.8.4.26 from 9.9.0 before 9.9.2.80 from 9.10.0 before 9.10.1.44 from 9.12.0 before 9.12.4.4 from 9.13.0 before 9.13.1.13 from 9.14.0 before 9.14.1.19 |