Input validation error in Cisco Adaptive Security Appliance (ASA) and Cisco Firewall Threat Defense (FTD) - CVE-2020-3191

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Main Vulnerability Database Vulnerabilities #VU27594

Input validation error in Cisco Adaptive Security Appliance (ASA) and Cisco Firewall Threat Defense (FTD) - CVE-2020-3191

Published: May 7, 2020 / Updated: May 7, 2020


Vulnerability identifier: #VU27594
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-2020-3191
CWE-ID: CWE-20
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 improper length validation of a field in an IPv6 DNS packet. A remote attacker can send a specially crafted DNS query over IPv6 and perform a denial of service (DoS) attack.


Affected software

Cisco Adaptive Security Appliance (ASA)
Cisco Firewall Threat Defense (FTD)

How to mitigate CVE-2020-3191

Install updarom vendor's website.

Cisco Adaptive Security Appliance (ASA) - addressed in versions 9.6.4.36, 9.8.4.12, 9.9.2.66, 9.10.1.37, 9.12.2.9
Cisco Firewall Threat Defense (FTD) - update to 6.4.0.6

External References

Related Security Bulletins