UpHeron
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Servers and applications

CVE-2023-20042

A vulnerability in the AnyConnect SSL VPN feature 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. This vulnerability is due to an implementation error within the SSL/TLS session handling process that can prevent the release of a…

Severity
High 8.6
Published
1 Nov 2023
Last changed
11 Aug 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Cisco ASA and Firepower Threat DefenseServers and applications · cpe:o:cisco:adaptive_security_appliance_software
  • Version 9.19.1
  • Version 9.18.2.7
  • Version 9.18.2.5
  • Version 9.18.2
All 30 release lines
  • Version 9.16.1
  • Version 9.16.1.28
  • Version 9.16.2
  • Version 9.16.2.3
  • Version 9.16.2.7
  • Version 9.16.2.11
  • Version 9.16.2.13
  • Version 9.16.2.14
  • Version 9.16.3
  • Version 9.16.3.3
  • Version 9.16.3.14
  • Version 9.16.3.15
  • Version 9.16.3.19
  • Version 9.16.3.23
  • Version 9.16.4
  • Version 9.16.4.9
  • Version 9.17.1
  • Version 9.17.1.7
  • Version 9.17.1.9
  • Version 9.17.1.10
  • Version 9.17.1.11
  • Version 9.17.1.13
  • Version 9.17.1.15
  • Version 9.17.1.20
  • Version 9.18.1
  • Version 9.18.1.3
  • Version 9.18.2
  • Version 9.18.2.5
  • Version 9.18.2.7
  • Version 9.19.1

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2023-20042
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2023-20042