CVE-2024-20481: Cisco ASA and FTD Denial-of-Service Vulnerability

CVE-2024-20481 · Severity: critical · CVSS 5.8 · Exploited in the wild · Published 2024-10-24

A resource exhaustion vulnerability in the Remote Access VPN (RAVPN) service of Cisco ASA and FTD software allows unauthenticated remote attackers to cause a denial-of-service. Attackers can exploit this by sending a large volume of VPN authentication requests, potentially requiring a device reload to restore service.

Technologies: Cisco Adaptive Security Appliance (ASA), Cisco Firepower Threat Defense (FTD). Vendors: Cisco.

Quick answers

Is CVE-2024-20481 exploited in the wild?
Yes. CVE-2024-20481 is known to be exploited in the wild, first recorded on 24 October 2024. Treat it as urgent.
How severe is CVE-2024-20481?
Critical severity, with a CVSS score of 5.8, published 24 October 2024.
Which products and versions are affected?
Cisco Adaptive Security Appliance (ASA) Software; Cisco Firepower Threat Defense (FTD) Software.
Is there a fix for CVE-2024-20481?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2024-20481 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2024-20481?
Check whether you run Cisco Adaptive Security Appliance (ASA) or Cisco Firepower Threat Defense (FTD). Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • Cisco Adaptive Security Appliance (ASA) Software
  • Cisco Firepower Threat Defense (FTD) Software

Timeline

  • 2024-10-24: disclosed
  • 2024-10-24: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2024-10-24: exploited: Reported as exploited in the wild in the advisory and CISA KEV catalog.

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