Cisco RAVPN Vulnerability to DoS Attacks
CVE-2024-20481

5.8MEDIUM

Key Information:

Vendor
Cisco
Status
Cisco Adaptive Security Appliance (asa) Software
Cisco Firepower Threat Defense Software
Vendor
CVE Published:
23 October 2024

Badges

👾 Exploit Exists🦅 CISA Reported📰 News Worthy

Summary

A vulnerability has been identified in the Remote Access VPN (RAVPN) service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software. This vulnerability enables unauthenticated remote attackers to exploit the RAVPN service through a significant number of VPN authentication requests, leading to resource exhaustion. The resulting denial of service impacts the RAVPN functionality, potentially necessitating a device reload to restore service. Other services on the device remain unaffected by this issue. Detailed insights into these types of attacks are further explored in Cisco Talos' findings regarding large-scale brute-force activities targeting VPNs.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Affected Version(s)

Cisco Adaptive Security Appliance (ASA) Software 9.8.1

Cisco Adaptive Security Appliance (ASA) Software 9.8.1.5

Cisco Adaptive Security Appliance (ASA) Software 9.8.1.7

News Articles

favicon imageCyberSecurityNews

CISA Warns of Cisco ASA & Roundcube Vulnerabilities Exploited in Wild

(CISA has announced the addition of two new vulnerabilities to its Known Exploited Vulnerabilities Catalog.

3 months ago

favicon imageThe Register

Cisco fixes bug under exploit in brute-force attacks

Cisco has patched an already exploited security hole in its Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) software that miscreants have been brute-forcing in attempted denial of service...

3 months ago

favicon imageTechTarget

Cisco ASA and FTD zero day used in password spraying attacks | Tech...

Another Cisco ASA and FTD vulnerability was disclosed on Wednesday. Organizations are urged to patch as its under active exploitation.

3 months ago

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
5.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • 📰

    First article discovered by Security Affairs

  • Vulnerability published

.