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Cisco FTD: CVE-2023-20042: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software AnyConnect SSL/TLS VPN Denial of Service Vulnerability

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Cisco FTD: CVE-2023-20042: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software AnyConnect SSL/TLS VPN Denial of Service Vulnerability

Severity
5
CVSS
(AV:N/AC:H/Au:N/C:N/I:N/A:C)
Published
11/01/2023
Created
02/07/2025
Added
01/29/2025
Modified
02/12/2025

Description

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 session handler under specific conditions. An attacker could exploit this vulnerability by sending crafted SSL/TLS traffic to an affected device, increasing the probability of session handler leaks. A successful exploit could allow the attacker to eventually deplete the available session handler pool, preventing new sessions from being established and causing a DoS condition.

Solution(s)

  • cisco-ftd-upgrade-latest

References

  • https://attackerkb.com/topics/cve-2023-20042
  • CVE - 2023-20042
  • https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ssl-dos-kxG8mpUA
  • cisco-sa-asaftd-ssl-dos-kxG8mpUA
  • 查看数 707
  • 已创建
  • 最后回复

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