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Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software AnyConnect SSL/TLS VPN Denial of Service Vulnerability

cisco-sa-asaftd-ssl-dos-kxG8mpUA · Medium · Published · Updated

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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ssl-dos-kxG8mpUA This advisory is part of the November 2023 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see Cisco Event Response: November 2023 Semiannual Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication.

Cisco advisory · CSAF JSON

Workarounds

There are no workarounds that address this vulnerability.

CVEsCVE-2023-20042
Cisco Bug IDsCSCwd62859
CVSS ScoreBase 6.8
Base 6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:X/RL:X/RC:X
Product Names From Source
Cisco Adaptive Security Appliance (ASA) Software 9.16.1, Cisco Adaptive Security Appliance (ASA) Software 9.16.1.28, Cisco Adaptive Security Appliance (ASA) Software 9.16.2, Cisco Adaptive Security Appliance (ASA) Software 9.16.2.3, Cisco Adaptive Security Appliance (ASA) Software 9.16.2.7, Cisco Adaptive Security Appliance (ASA) Software 9.16.2.11, Cisco Adaptive Security Appliance (ASA) Software 9.16.2.13, Cisco Adaptive Security Appliance (ASA) Software 9.16.2.14, Cisco Adaptive Security Appliance (ASA) Software 9.16.3, Cisco Adaptive Security Appliance (ASA) Software 9.16.3.3, Cisco Adaptive Security Appliance (ASA) Software 9.16.3.14, Cisco Adaptive Security Appliance (ASA) Software 9.16.3.15, Cisco Adaptive Security Appliance (ASA) Software 9.16.3.19, Cisco Adaptive Security Appliance (ASA) Software 9.16.3.23, Cisco Adaptive Security Appliance (ASA) Software 9.16.4, Cisco Adaptive Security Appliance (ASA) Software 9.16.4.9, Cisco Adaptive Security Appliance (ASA) Software 9.17.1, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.7, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.9, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.10, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.11, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.13, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.15, Cisco Adaptive Security Appliance (ASA) Software 9.17.1.20, Cisco Adaptive Security Appliance (ASA) Software 9.18.1, Cisco Adaptive Security Appliance (ASA) Software 9.18.1.3, Cisco Adaptive Security Appliance (ASA) Software 9.18.2, Cisco Adaptive Security Appliance (ASA) Software 9.18.2.5, Cisco Adaptive Security Appliance (ASA) Software 9.18.2.7, Cisco Adaptive Security Appliance (ASA) Software 9.19.1, Cisco Firepower Threat Defense Software 7.0.0, Cisco Firepower Threat Defense Software 7.0.0.1, Cisco Firepower Threat Defense Software 7.0.1, Cisco Firepower Threat Defense Software 7.0.1.1, Cisco Firepower Threat Defense Software 7.0.2, Cisco Firepower Threat Defense Software 7.0.2.1, Cisco Firepower Threat Defense Software 7.0.3, Cisco Firepower Threat Defense Software 7.0.4, Cisco Firepower Threat Defense Software 7.0.5, Cisco Firepower Threat Defense Software 7.1.0, Cisco Firepower Threat Defense Software 7.1.0.1, Cisco Firepower Threat Defense Software 7.1.0.2, Cisco Firepower Threat Defense Software 7.1.0.3, Cisco Firepower Threat Defense Software 7.2.0, Cisco Firepower Threat Defense Software 7.2.0.1, Cisco Firepower Threat Defense Software 7.2.1, Cisco Firepower Threat Defense Software 7.2.2, Cisco Firepower Threat Defense Software 7.2.3, Cisco Firepower Threat Defense Software 7.3.0, Cisco Firepower Threat Defense Software 7.3.1, Cisco Firepower Threat Defense Software 7.3.1.1, Cisco Firepower Threat Defense Software 7.3.1.2, Cisco Secure Firewall Adaptive Security Appliance (ASA) Software, Cisco Secure Firewall Threat Defense (FTD) Software, Cisco Firepower 2100 Series, Cisco Firepower 1000 Series, Cisco ASA 5500-X Series Firewalls, Cisco 3000 Series Industrial Security Appliances (ISA), Cisco Firepower 9000 Series, Cisco Firepower 4100 Series, Cisco Adaptive Security Virtual Appliance (ASAv), Cisco Secure Firewall 3100 Series, Cisco Secure Firewall Threat Defense Virtual

Related Products

Product CVE Evidence
Cisco Secure Firewall Threat Defense Virtual CVE-2023-20042 Cisco OpenVuln
Cisco Secure Firewall Threat Defense (FTD) Software CVE-2023-20042 Cisco OpenVuln
Cisco Secure Firewall Adaptive Security Appliance (ASA) Software CVE-2023-20042 Cisco OpenVuln
Cisco Secure Firewall 3100 Series CVE-2023-20042 Cisco OpenVuln
Cisco Firepower Threat Defense Software CVE-2023-20042 Cisco OpenVuln
Cisco Firepower 9000 Series CVE-2023-20042 Cisco OpenVuln
Cisco Firepower 4100 Series CVE-2023-20042 Cisco OpenVuln
Cisco Firepower 2100 Series CVE-2023-20042 Cisco OpenVuln
Cisco Firepower 1000 Series CVE-2023-20042 Cisco OpenVuln
Cisco Adaptive Security Virtual Appliance (ASAv) CVE-2023-20042 Cisco OpenVuln
Cisco Adaptive Security Appliance (ASA) Software CVE-2023-20042 Cisco OpenVuln
Cisco ASA 5500-X Series Firewalls CVE-2023-20042 Cisco OpenVuln
Cisco 3000 Series Industrial Security Appliances (ISA) CVE-2023-20042 Cisco OpenVuln