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

1) Authentication bypass using an alternate path or channel

EUVDB-ID: #VU80521

Risk: High

CVSSv3.1: 7.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N/E:H/RL:O/RC:C]

CVE-ID: CVE-2023-20269

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

Exploit availability: No

Description

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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Adaptive Security Appliance (ASA): 6.2.3 - 9.19.1.18

Cisco Firepower Threat Defense (FTD): 6.2.3 - 9.19.1.18

External links

http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ravpn-auth-8LyfCkeC

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.