UpHeron
All vulnerabilities

Servers and applications

CVE-2020-3191

A vulnerability in DNS over IPv6 packet processing for Cisco Adaptive Security Appliance (ASA) Software and Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to unexpectedly reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper length validation of a field in an IPv6 DNS packet. An attacker could…

Severity
High 8.6
Published
6 May 2020
Last changed
11 Aug 2026
Added to UpHeron
1 Nov 2026
Fixed in
9.6.4.36, 9.8.4.12, 9.9.2.66, 9.10.1.37, 9.12.2.9
Sources
NVD

Affected software

SoftwareAffected versions
Cisco ASA and Firepower Threat DefenseServers and applications · cpe:o:cisco:adaptive_security_appliance_software
  • From 9.6 before 9.6.4.36
  • From 9.8 before 9.8.4.12
  • From 9.9 before 9.9.2.66
  • From 9.10 before 9.10.1.37
  • From 9.12 before 9.12.2.9

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2020-3191
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2020-3191