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CVE-2024-20426

HIGHCVSS 8.6/10EPSS 0.54%

Last modified

CVE-2024-20426 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol for VPN termination 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) condition on an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted IKEv2 traffic to an affected device. EPSS estimates a 0.54% chance of exploitation in the next 30 days.

Description

A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol for VPN termination 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) condition on an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted IKEv2 traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Metrics

CVSS 3.1
8.6/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

EPSS Probability
0.54%

41.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoAdaptive Security Appliance Software9.18.1
CiscoAdaptive Security Appliance Software9.18.1.3
CiscoAdaptive Security Appliance Software9.18.2
CiscoAdaptive Security Appliance Software9.18.2.5
CiscoAdaptive Security Appliance Software9.18.2.7
CiscoAdaptive Security Appliance Software9.18.2.8
CiscoAdaptive Security Appliance Software9.18.3
CiscoAdaptive Security Appliance Software9.18.3.39
CiscoAdaptive Security Appliance Software9.18.3.46
CiscoAdaptive Security Appliance Software9.18.3.53
CiscoAdaptive Security Appliance Software9.18.3.55
CiscoAdaptive Security Appliance Software9.18.3.56
CiscoAdaptive Security Appliance Software9.18.4
CiscoAdaptive Security Appliance Software9.18.4.5
CiscoAdaptive Security Appliance Software9.18.4.8
CiscoAdaptive Security Appliance Software9.18.4.22
CiscoAdaptive Security Appliance Software9.18.4.24
CiscoAdaptive Security Appliance Software9.18.4.29
CiscoAdaptive Security Appliance Software9.19.1
CiscoAdaptive Security Appliance Software9.19.1.5
CiscoAdaptive Security Appliance Software9.19.1.9
CiscoAdaptive Security Appliance Software9.19.1.12
CiscoAdaptive Security Appliance Software9.19.1.18
CiscoAdaptive Security Appliance Software9.19.1.22
CiscoAdaptive Security Appliance Software9.19.1.24
CiscoAdaptive Security Appliance Software9.19.1.27
CiscoAdaptive Security Appliance Software9.19.1.28
CiscoAdaptive Security Appliance Software9.19.1.31
CiscoAdaptive Security Appliance Software9.20.1
CiscoAdaptive Security Appliance Software9.20.1.5
CiscoAdaptive Security Appliance Software9.20.2
CiscoAdaptive Security Appliance Software9.20.2.10
CiscoAdaptive Security Appliance Software9.20.2.21
CiscoFirepower Threat Defense Software7.2.0
CiscoFirepower Threat Defense Software7.2.0.1
CiscoFirepower Threat Defense Software7.2.1
CiscoFirepower Threat Defense Software7.2.2
CiscoFirepower Threat Defense Software7.2.3
CiscoFirepower Threat Defense Software7.2.4
CiscoFirepower Threat Defense Software7.2.4.1
CiscoFirepower Threat Defense Software7.2.5
CiscoFirepower Threat Defense Software7.2.5.1
CiscoFirepower Threat Defense Software7.2.5.2
CiscoFirepower Threat Defense Software7.2.6
CiscoFirepower Threat Defense Software7.2.7
CiscoFirepower Threat Defense Software7.2.8
CiscoFirepower Threat Defense Software7.2.8.1
CiscoFirepower Threat Defense Software7.3.0
CiscoFirepower Threat Defense Software7.3.1
CiscoFirepower Threat Defense Software7.3.1.1

Showing 50 of 54 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Analyzed

Frequently Asked Questions

What is CVE-2024-20426?
A vulnerability in the Internet Key Exchange version 2 (IKEv2) protocol for VPN termination 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) condition on an affected device. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted IKEv2 traffic to an affected device. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.
How severe is CVE-2024-20426?
CVE-2024-20426 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.
How do I fix CVE-2024-20426?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-20426?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST