SB2023090728 - Authentication bypass using an alternate path or channel in Cisco Adaptive Security Appliance and Firepower Threat Defense

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Main Vulnerability Database SB2023090728

SB2023090728 - Authentication bypass using an alternate path or channel in Cisco Adaptive Security Appliance and Firepower Threat Defense

Published: September 7, 2023 Updated: September 8, 2023

Security Bulletin ID SB2023090728
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Authentication bypass using an alternate path or channel (CVE-ID: CVE-2023-20269)

CWE-ID: CWE-288 - Authentication Bypass Using an Alternate Path or Channel

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:A/U:Amber


The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to improper separation of authentication, authorization, and accounting (AAA) between the remote access VPN feature and the HTTPS management and site-to-site VPN features. A remote user can perform a brute-force attack and establish a clientless SSL VPN session with an unauthorized user.

Note, the vulnerability is being actively exploited in the wild.


Remediation

Install update from vendor's website.

References