PT-2024-7475 · Cisco · Cisco Asa+1

Jason Crowder · Published 2024-10-23 · Updated 2025-08-15 · CVE-2024-20495

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Cisco Adaptive Security Appliance (ASA) Software (affected versions not specified) Cisco Firepower Threat Defense (FTD) Software (affected versions not specified)

Description: The issue is related to insufficient input validation in the Remote Access VPN feature. This could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of client key data after the TLS session is established. An attacker could exploit this by sending a crafted key value to an affected system over the secure TLS session.

Recommendations: For Cisco Adaptive Security Appliance (ASA) Software, update to a version that fixes the improper validation of client key data. For Cisco Firepower Threat Defense (FTD) Software, update to a version that fixes the improper validation of client key data. As a temporary workaround, consider restricting access to the Remote Access VPN feature until a patch is available.

Fix

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2024-08855

CVE-2024-20495

Affected Products

Cisco Asa

Cisco Ftd

References · 8

• https://safe-surf.ru/specialists/bulletins-nkcki/713192 · Security Note
• https://bdu.fstec.ru/vul/2024-08855 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asa-vpn-cZf8gT · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-20495 · Security Note
• https://osv.dev/vulnerability/CVE-2024-20495 · Vendor Advisory
• https://t.me/cveNotify/130591 · Telegram Post
• https://t.me/cveNotify/132465 · Telegram Post
• https://t.me/cvedetector/8743 · Telegram Post