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

Missing Release of Resource after Effective Lifetime
CVE-2024-20481

Vulnerability details

Advisory: SB2024102373 - Denial of service and brute-force attack in Cisco ASA and FTD Remote Access VPN

Vulnerable component: Cisco Adaptive Security Appliance (ASA)

CVE-ID: CVE-2024-20481

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

CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime

Description:

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to resource exhaustion in the Remote Access VPN (RAVPN) service. A remote attacker can perform password spraying attack, cause resource exhaustion and perform a denial of service attack against the RAVPN service.

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

External links:

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-bf-dos-vDZhLqrW


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.