PT-2023-7121 · Cisco · Cisco Asa+1

Published 2023-11-01 · Updated 2024-01-25 · CVE-2023-20042

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco Adaptive Security Appliance (ASA) Software (affected versions not specified) Cisco Firepower Threat Defense (FTD) Software (affected versions not specified)

Description A vulnerability in the AnyConnect SSL VPN feature could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This issue 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 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.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Improper Resource Release

Weakness Enumeration

CWE-404

Related Identifiers

BDU:2023-08148

CVE-2023-20042

Affected Products

Cisco Asa

Cisco Ftd

References · 8

• https://osv.dev/vulnerability/CVE-2023-20042 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-08148 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ssl-dos-kxG8mpUA · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-20042 · Security Note
• https://t.me/cibsecurity/73380 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2023110150 · Note
• https://twitter.com/CVEnew/status/1719768435821891813 · Twitter Post
• https://twitter.com/shah_sheikh/status/1720094766506168781 · Twitter Post