CVE-2020-3196
Cisco Secure Firewall Threat Defense
A vulnerability in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) handler of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to exhaust memory resources on the affected device, leading to a denial of service (DoS) condition. The vulnerability is due to improper resource management for inbound SSL/TLS connections. An attacker could exploit this vulnerability by establishing multiple SSL/TLS connections with specific conditions to the affected device. A successful exploit could allow the attacker to exhaust the memory on the affected device, causing the device to stop accepting new SSL/TLS connections and resulting in a DoS condition for services on the device that process SSL/TLS traffic. Manual intervention is required to recover an affected device.
Exploitation status
- A vendor advisory or patch reference has been published.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 8.6 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H- Weakness
- CWE-400
- Assigned by
- psirt@cisco.com
Dates
- Published
- 2020-05-06
- Last modified
- 2026-08-11
- Sources
- NVD
Affected products
- Cisco Secure Firewall Threat Defense6.2.3 - 6.2.3.16, 6.3.0 - 6.3.0.6, 6.4.0 - 6.4.0.9, 6.5.0 - 6.5.0.5
- Cisco Asa 5505 Firmware9.4\(4\), 9.8\(4.18\), 100.13\(0\)
- Cisco Asa 5505all versions
- Cisco Asa 5510 Firmware9.4\(4\), 9.8\(4.18\), 100.13\(0\)
- Cisco Asa 5510all versions
- Cisco Asa 5512-X Firmware9.4\(4\), 9.8\(4.18\), 100.13\(0\)
- Cisco Asa 5512-Xall versions
- Cisco Asa 5515-X Firmware9.4\(4\), 9.8\(4.18\), 100.13\(0\)
- Cisco Asa 5515-Xall versions
- Cisco Asa 5520 Firmware9.4\(4\), 9.8\(4.18\), 100.13\(0\)
- Cisco Asa 5520all versions
- Cisco Asa 5525-X Firmware9.4\(4\), 9.8\(4.18\), 100.13\(0\)
As listed in the NVD configuration data. Not a statement about your estate.