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IMMUNITYSEC

CVE-2024-20481

5.8
MEDIUM
CVSS 3.1
EPSS 15.8% · 97th pctCISA KEV · Exploited in the wild
2024-10-23•Updated 2025-10-21•KEV 2024-10-24
CISA Known Exploited Vulnerabilities

Cisco ASA and FTD Denial-of-Service Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.

Added to KEV
2024-10-24
Remediation due
2024-11-14

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

CISA notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-bf-dos-vDZhLqrW ; https://nvd.nist.gov/vuln/detail/CVE-2024-20481

Description

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.

Severity

CVSS 3.1 · CNA5.8 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L
SSVC · CISA-ADP
Exploitationactive
Automatableyes
Technical impactpartial

Affected Products

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

References

1 Links

Record Details

Published
2024-10-23
Last updated
2025-10-21
Assigner (CNA)
cisco
Credited to
-

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