PT-2024-7436 · Cisco · Cisco Asa+1

Tristan Van Egroo · Published 2024-10-23 · Updated 2025-07-15 · CVE-2024-20402

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 a logic error in memory management when handling SSL VPN connections, which could allow an unauthenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This can be achieved by sending crafted SSL/TLS packets to the SSL VPN server of the affected device.

Recommendations: For Cisco Adaptive Security Appliance (ASA) Software, update to a version that includes the fix for this issue. For Cisco Firepower Threat Defense (FTD) Software, update to a version that includes the fix for this issue. As a temporary workaround, consider restricting access to the SSL VPN feature until a patch is available.

Fix

DoS

Access of Memory Location After End of Buffer

Weakness Enumeration

CWE-788

Related Identifiers

BDU:2024-08814

CVE-2024-20402

Affected Products

Cisco Asa

Cisco Ftd

References · 6

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-dos-hOnB9pH4 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2024-20402 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-20402 · Security Note
• https://safe-surf.ru/specialists/bulletins-nkcki/713201 · Security Note
• https://bdu.fstec.ru/vul/2024-08814 · Security Note
• https://t.me/cvenotify/129057 · Telegram Post