Insufficient verification of data authenticity in Cisco Adaptive Security Appliance (ASA) and Cisco Firewall Threat Defense (FTD) - CVE-2023-20275

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Main Vulnerability Database Vulnerabilities #VU83885

Insufficient verification of data authenticity in Cisco Adaptive Security Appliance (ASA) and Cisco Firewall Threat Defense (FTD) - CVE-2023-20275

Published: December 5, 2023


Vulnerability identifier: #VU83885
CSH Severity: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2023-20275
CWE-ID: CWE-345
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Cisco Adaptive Security Appliance (ASA)
Cisco Firewall Threat Defense (FTD)
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote user to impersonate other VPN users.

The vulnerability exists due to improper validation of the packet's inner source IP address after decryption in the AnyConnect SSL VPN feature. A remote user can send specially crafted packets through the tunnel, impersonate another VPN user's IP address and receive return packets.


Remediation

Install updates from vendor's website.

External links