Zero-day vulnerability in Cisco Adaptive Security Appliance (ASA)

Code Injection
CVE-2024-20359

Vulnerability details

Advisory: SB2024042463 - Code execution in Cisco Adaptive Security Appliance and Firepower Threat Defense

Vulnerable component: Cisco Adaptive Security Appliance (ASA)

CVE-ID: CVE-2024-20359

CVSSv3 score: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N/E:H/RL:O/RC:C

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Description:

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper input validation in a legacy capability that allowed for the preloading of VPN clients and plug-ins. A local user can copy a crafted file to the disk0: file system of an affected device and execute arbitrary code with root privileges.

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

External links:

https://blog.talosintelligence.com/arcanedoor-new-espionage-focused-campaign-found-targeting-perimet...

About zero-day vulnerabilities

Zero-day vulnerability is an undisclosed vulnerability in software that hackers can exploit to compromise computer programs, gain unauthorized access to sensitive data, penetrate networks, etc. We consider vulnerability a zero-day when there is no solution provided from software vendor and the vulnerability is being actively exploited by malicious actors.

Zero-day candidate is a potential zero-day vulnerability in software which might have been used in targeted attacks, however there is no evidence to support this suggestion.