Cisco Firewalls Vulnerabilities & Security Advisories

Medium [CVE-2023-20269] vulnerability in the remote access VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to conduct a brute force attack in an attempt to identify valid username and password combinations or an authenticated, remote attacker to establish a clientless SSL VPN session with an unauthorized user

An unauthenticated remote attacker could exploit a flaw in the remote access VPN feature of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software to conduct a brute force attack in an attempt to identify valid username and password combinations or an authenticated, remote attacker to establish a clientless SSL VPN session with an unauthorized user. The flaw is caused by improper separation of authentication, authorization, and accounting (AAA) between the remote access VPN feature and the HTTPS management and site-to-site VPN features. Establish a clientless SSL VPN session (only when running Cisco ASA Software Release 9.16 or earlier). Affected products named by the advisory: Secure Firewall Adaptive Security Appliance (ASA) Software; ASA 5500-X Series Firewalls; 3000 Series Industrial Security Appliances (ISA); Firepower 9000 Series; and 4 more. Affected products named by the advisory: Firepower 4100 Series; Adaptive Security Virtual Appliance (ASAv); Firepower 2100 Series; Firepower 1000 Series.