Resource exhaustion in Cisco Secure Firewall Adaptive Security Appliance (ASA) and Cisco Secure Firewall Threat Defense (FTD) - CVE-2020-3196
Published: May 7, 2020
Vulnerability identifier: #VU27597
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-3196
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources in the Secure Sockets Layer (SSL)/Transport Layer Security (TLS) handler. A remote attacker can establish multiple SSL/TLS connections with specific conditions, trigger resource exhaustion and perform a denial of service (DoS) attack.
Affected software
Cisco Secure Firewall Adaptive Security Appliance (ASA)
Cisco Secure Firewall Threat Defense (FTD)
Cisco Secure Firewall Threat Defense (FTD)
How to mitigate CVE-2020-3196
Vendor recommends to update the Cisco FTD Software Release to version 6.2.3.16 (June 2020), 6.3.0.6 (future release), 6.4.0.9 (May 2020) and 6.5.0.5 (future release).
Cisco Secure Firewall Adaptive Security Appliance (ASA) - addressed in versions 9.6.4.40, 9.8.4.20, 9.9.2.66, 9.10.1.37, 9.12.3.2, 9.13.1.7