Exploited
medium
5.8
CWE
772 119
Advisory Published
Updated

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

First published: Wed Oct 23 2024(Updated: )

A vulnerability in the Remote Access VPN (RAVPN) service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) of the RAVPN service. This vulnerability is due to resource exhaustion. An attacker could exploit this vulnerability by sending a large number of VPN authentication requests to an affected device. A successful exploit could allow the attacker to exhaust resources, resulting in a DoS of the RAVPN service on the affected device. Depending on the impact of the attack, a reload of the device may be required to restore the RAVPN service. Services that are not related to VPN are not affected. Cisco Talos discussed these attacks in the blog post Large-scale brute-force activity targeting VPNs, SSH services with commonly used login credentials.

Credit: ykramarz@cisco.com psirt@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco Firepower Threat Defense (FTD)
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.2
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.3
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.4
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.5
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.6
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.7
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.8
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.9
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.10
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.11
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.12
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.13
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.14
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.15
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.16
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.17
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.2.3.18
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.2
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.3
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.4
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.5
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.6
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.7
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.8
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.9
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.10
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.11
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.12
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.13
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.14
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.15
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.16
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.17
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.4.0.18
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.6.0
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.6.0.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.6.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.6.3
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.6.4
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.6.5
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.6.5.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.6.5.2
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.6.7
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.6.7.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.6.7.2
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.7.0
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.7.0.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.7.0.2
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=6.7.0.3
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.0
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.0.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.1.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.2
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.2.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.3
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.4
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.5
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.6
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.6.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.0.6.2
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.1.0
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.1.0.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.1.0.2
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.1.0.3
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.0
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.0.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.2
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.3
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.4
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.4.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.5
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.5.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.5.2
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.6
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.7
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.8
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.2.8.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.3.0
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.3.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.3.1.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.3.1.2
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.4.0
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.4.1
Cisco Firepower Management Center (FMC) and Firepower Threat Defense (FTD) Software=7.4.1.1
Cisco Adaptive Security Appliance Software=9.8.1
Cisco Adaptive Security Appliance Software=9.8.1.5
Cisco Adaptive Security Appliance Software=9.8.1.7
Cisco Adaptive Security Appliance Software=9.8.2
Cisco Adaptive Security Appliance Software=9.8.2.8
Cisco Adaptive Security Appliance Software=9.8.2.14
Cisco Adaptive Security Appliance Software=9.8.2.15
Cisco Adaptive Security Appliance Software=9.8.2.17
Cisco Adaptive Security Appliance Software=9.8.2.20
Cisco Adaptive Security Appliance Software=9.8.2.24
Cisco Adaptive Security Appliance Software=9.8.2.26
Cisco Adaptive Security Appliance Software=9.8.2.28
Cisco Adaptive Security Appliance Software=9.8.2.33
Cisco Adaptive Security Appliance Software=9.8.2.35
Cisco Adaptive Security Appliance Software=9.8.2.38
Cisco Adaptive Security Appliance Software=9.8.2.45
Cisco Adaptive Security Appliance Software=9.8.3
Cisco Adaptive Security Appliance Software=9.8.3.8
Cisco Adaptive Security Appliance Software=9.8.3.11
Cisco Adaptive Security Appliance Software=9.8.3.14
Cisco Adaptive Security Appliance Software=9.8.3.16
Cisco Adaptive Security Appliance Software=9.8.3.18
Cisco Adaptive Security Appliance Software=9.8.3.21
Cisco Adaptive Security Appliance Software=9.8.3.26
Cisco Adaptive Security Appliance Software=9.8.3.29
Cisco Adaptive Security Appliance Software=9.8.4
Cisco Adaptive Security Appliance Software=9.8.4.3
Cisco Adaptive Security Appliance Software=9.8.4.7
Cisco Adaptive Security Appliance Software=9.8.4.8
Cisco Adaptive Security Appliance Software=9.8.4.10
Cisco Adaptive Security Appliance Software=9.8.4.12
Cisco Adaptive Security Appliance Software=9.8.4.15
Cisco Adaptive Security Appliance Software=9.8.4.17
Cisco Adaptive Security Appliance Software=9.8.4.20
Cisco Adaptive Security Appliance Software=9.8.4.22
Cisco Adaptive Security Appliance Software=9.8.4.25
Cisco Adaptive Security Appliance Software=9.8.4.26
Cisco Adaptive Security Appliance Software=9.8.4.29
Cisco Adaptive Security Appliance Software=9.8.4.32
Cisco Adaptive Security Appliance Software=9.8.4.33
Cisco Adaptive Security Appliance Software=9.8.4.34
Cisco Adaptive Security Appliance Software=9.8.4.35
Cisco Adaptive Security Appliance Software=9.8.4.39
Cisco Adaptive Security Appliance Software=9.8.4.40
Cisco Adaptive Security Appliance Software=9.8.4.41
Cisco Adaptive Security Appliance Software=9.8.4.43
Cisco Adaptive Security Appliance Software=9.8.4.44
Cisco Adaptive Security Appliance Software=9.8.4.45
Cisco Adaptive Security Appliance Software=9.8.4.46
Cisco Adaptive Security Appliance Software=9.8.4.48
Cisco Adaptive Security Appliance Software=9.12.1
Cisco Adaptive Security Appliance Software=9.12.1.2
Cisco Adaptive Security Appliance Software=9.12.1.3
Cisco Adaptive Security Appliance Software=9.12.2
Cisco Adaptive Security Appliance Software=9.12.2.1
Cisco Adaptive Security Appliance Software=9.12.2.4
Cisco Adaptive Security Appliance Software=9.12.2.5
Cisco Adaptive Security Appliance Software=9.12.2.9
Cisco Adaptive Security Appliance Software=9.12.3
Cisco Adaptive Security Appliance Software=9.12.3.2
Cisco Adaptive Security Appliance Software=9.12.3.7
Cisco Adaptive Security Appliance Software=9.12.3.9
Cisco Adaptive Security Appliance Software=9.12.3.12
Cisco Adaptive Security Appliance Software=9.12.4
Cisco Adaptive Security Appliance Software=9.12.4.2
Cisco Adaptive Security Appliance Software=9.12.4.4
Cisco Adaptive Security Appliance Software=9.12.4.7
Cisco Adaptive Security Appliance Software=9.12.4.8
Cisco Adaptive Security Appliance Software=9.12.4.10
Cisco Adaptive Security Appliance Software=9.12.4.13
Cisco Adaptive Security Appliance Software=9.12.4.18
Cisco Adaptive Security Appliance Software=9.12.4.24
Cisco Adaptive Security Appliance Software=9.12.4.26
Cisco Adaptive Security Appliance Software=9.12.4.29
Cisco Adaptive Security Appliance Software=9.12.4.30
Cisco Adaptive Security Appliance Software=9.12.4.35
Cisco Adaptive Security Appliance Software=9.12.4.37
Cisco Adaptive Security Appliance Software=9.12.4.38
Cisco Adaptive Security Appliance Software=9.12.4.39
Cisco Adaptive Security Appliance Software=9.12.4.40
Cisco Adaptive Security Appliance Software=9.12.4.41
Cisco Adaptive Security Appliance Software=9.12.4.47
Cisco Adaptive Security Appliance Software=9.12.4.48
Cisco Adaptive Security Appliance Software=9.12.4.50
Cisco Adaptive Security Appliance Software=9.12.4.52
Cisco Adaptive Security Appliance Software=9.12.4.54
Cisco Adaptive Security Appliance Software=9.12.4.55
Cisco Adaptive Security Appliance Software=9.12.4.56
Cisco Adaptive Security Appliance Software=9.12.4.58
Cisco Adaptive Security Appliance Software=9.12.4.62
Cisco Adaptive Security Appliance Software=9.12.4.65
Cisco Adaptive Security Appliance Software=9.12.4.67
Cisco Adaptive Security Appliance Software=9.14.1
Cisco Adaptive Security Appliance Software=9.14.1.6
Cisco Adaptive Security Appliance Software=9.14.1.10
Cisco Adaptive Security Appliance Software=9.14.1.15
Cisco Adaptive Security Appliance Software=9.14.1.19
Cisco Adaptive Security Appliance Software=9.14.1.30
Cisco Adaptive Security Appliance Software=9.14.2
Cisco Adaptive Security Appliance Software=9.14.2.4
Cisco Adaptive Security Appliance Software=9.14.2.8
Cisco Adaptive Security Appliance Software=9.14.2.13
Cisco Adaptive Security Appliance Software=9.14.2.15
Cisco Adaptive Security Appliance Software=9.14.3
Cisco Adaptive Security Appliance Software=9.14.3.1
Cisco Adaptive Security Appliance Software=9.14.3.9
Cisco Adaptive Security Appliance Software=9.14.3.11
Cisco Adaptive Security Appliance Software=9.14.3.13
Cisco Adaptive Security Appliance Software=9.14.3.15
Cisco Adaptive Security Appliance Software=9.14.3.18
Cisco Adaptive Security Appliance Software=9.14.4
Cisco Adaptive Security Appliance Software=9.14.4.6
Cisco Adaptive Security Appliance Software=9.14.4.7
Cisco Adaptive Security Appliance Software=9.14.4.12
Cisco Adaptive Security Appliance Software=9.14.4.13
Cisco Adaptive Security Appliance Software=9.14.4.14
Cisco Adaptive Security Appliance Software=9.14.4.15
Cisco Adaptive Security Appliance Software=9.14.4.17
Cisco Adaptive Security Appliance Software=9.14.4.22
Cisco Adaptive Security Appliance Software=9.14.4.23
Cisco Adaptive Security Appliance Software=9.14.4.24
Cisco Adaptive Security Appliance Software=9.15.1
Cisco Adaptive Security Appliance Software=9.15.1.1
Cisco Adaptive Security Appliance Software=9.15.1.7
Cisco Adaptive Security Appliance Software=9.15.1.10
Cisco Adaptive Security Appliance Software=9.15.1.15
Cisco Adaptive Security Appliance Software=9.15.1.16
Cisco Adaptive Security Appliance Software=9.15.1.17
Cisco Adaptive Security Appliance Software=9.15.1.21
Cisco Adaptive Security Appliance Software=9.16.1
Cisco Adaptive Security Appliance Software=9.16.1.28
Cisco Adaptive Security Appliance Software=9.16.2
Cisco Adaptive Security Appliance Software=9.16.2.3
Cisco Adaptive Security Appliance Software=9.16.2.7
Cisco Adaptive Security Appliance Software=9.16.2.11
Cisco Adaptive Security Appliance Software=9.16.2.13
Cisco Adaptive Security Appliance Software=9.16.2.14
Cisco Adaptive Security Appliance Software=9.16.3
Cisco Adaptive Security Appliance Software=9.16.3.3
Cisco Adaptive Security Appliance Software=9.16.3.14
Cisco Adaptive Security Appliance Software=9.16.3.15
Cisco Adaptive Security Appliance Software=9.16.3.19
Cisco Adaptive Security Appliance Software=9.16.3.23
Cisco Adaptive Security Appliance Software=9.16.4
Cisco Adaptive Security Appliance Software=9.16.4.9
Cisco Adaptive Security Appliance Software=9.16.4.14
Cisco Adaptive Security Appliance Software=9.16.4.18
Cisco Adaptive Security Appliance Software=9.16.4.19
Cisco Adaptive Security Appliance Software=9.16.4.27
Cisco Adaptive Security Appliance Software=9.16.4.38
Cisco Adaptive Security Appliance Software=9.16.4.39
Cisco Adaptive Security Appliance Software=9.16.4.42
Cisco Adaptive Security Appliance Software=9.16.4.48
Cisco Adaptive Security Appliance Software=9.16.4.55
Cisco Adaptive Security Appliance Software=9.16.4.57
Cisco Adaptive Security Appliance Software=9.16.4.61
Cisco Adaptive Security Appliance Software=9.17.1
Cisco Adaptive Security Appliance Software=9.17.1.7
Cisco Adaptive Security Appliance Software=9.17.1.9
Cisco Adaptive Security Appliance Software=9.17.1.10
Cisco Adaptive Security Appliance Software=9.17.1.11
Cisco Adaptive Security Appliance Software=9.17.1.13
Cisco Adaptive Security Appliance Software=9.17.1.15
Cisco Adaptive Security Appliance Software=9.17.1.20
Cisco Adaptive Security Appliance Software=9.17.1.30
Cisco Adaptive Security Appliance Software=9.17.1.33
Cisco Adaptive Security Appliance Software=9.17.1.39
Cisco Adaptive Security Appliance Software=9.18.1
Cisco Adaptive Security Appliance Software=9.18.1.3
Cisco Adaptive Security Appliance Software=9.18.2
Cisco Adaptive Security Appliance Software=9.18.2.5
Cisco Adaptive Security Appliance Software=9.18.2.7
Cisco Adaptive Security Appliance Software=9.18.2.8
Cisco Adaptive Security Appliance Software=9.18.3
Cisco Adaptive Security Appliance Software=9.18.3.39
Cisco Adaptive Security Appliance Software=9.18.3.46
Cisco Adaptive Security Appliance Software=9.18.3.53
Cisco Adaptive Security Appliance Software=9.18.3.55
Cisco Adaptive Security Appliance Software=9.18.3.56
Cisco Adaptive Security Appliance Software=9.18.4
Cisco Adaptive Security Appliance Software=9.18.4.5
Cisco Adaptive Security Appliance Software=9.18.4.8
Cisco Adaptive Security Appliance Software=9.18.4.22
Cisco Adaptive Security Appliance Software=9.18.4.24
Cisco Adaptive Security Appliance Software=9.19.1
Cisco Adaptive Security Appliance Software=9.19.1.5
Cisco Adaptive Security Appliance Software=9.19.1.9
Cisco Adaptive Security Appliance Software=9.19.1.12
Cisco Adaptive Security Appliance Software=9.19.1.18
Cisco Adaptive Security Appliance Software=9.19.1.22
Cisco Adaptive Security Appliance Software=9.19.1.24
Cisco Adaptive Security Appliance Software=9.19.1.27
Cisco Adaptive Security Appliance Software=9.19.1.28
Cisco Adaptive Security Appliance Software=9.19.1.31
Cisco Adaptive Security Appliance Software=9.20.1
Cisco Adaptive Security Appliance Software=9.20.1.5
Cisco Adaptive Security Appliance Software=9.20.2
Cisco Adaptive Security Appliance Software=9.20.2.10
Cisco Adaptive Security Appliance Software=9.20.2.21

Remedy

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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Reference Links

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of CVE-2024-20481?

    CVE-2024-20481 is rated as a high severity vulnerability.

  • How do I fix CVE-2024-20481?

    To fix CVE-2024-20481, upgrade to the latest Cisco Adaptive Security Appliance (ASA) or Firepower Threat Defense (FTD) software version as recommended by Cisco.

  • What types of attacks can exploit CVE-2024-20481?

    CVE-2024-20481 can be exploited to cause a denial of service (DoS) condition on the affected service.

  • Which Cisco products are affected by CVE-2024-20481?

    CVE-2024-20481 affects specific versions of Cisco Adaptive Security Appliance (ASA) and Cisco Firepower Threat Defense (FTD) software.

  • Is authentication required to exploit CVE-2024-20481?

    No, CVE-2024-20481 can be exploited by unauthenticated, remote attackers.

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