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CVE-2021-40125

MEDIUMCVSS 6.5/10EPSS 0.98%

Last modified

CVE-2021-40125 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A vulnerability in the Internet Key Exchange Version 2 (IKEv2) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to trigger a denial of service (DoS) condition on an affected device. This vulnerability is due to improper control of a resource. EPSS estimates a 0.98% chance of exploitation in the next 30 days.

Description

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to trigger a denial of service (DoS) condition on an affected device. This vulnerability is due to improper control of a resource. An attacker with the ability to spoof a trusted IKEv2 site-to-site VPN peer and in possession of valid IKEv2 credentials for that peer could exploit this vulnerability by sending malformed, authenticated IKEv2 messages to an affected device. A successful exploit could allow the attacker to trigger a reload of the device.

Metrics

CVSS 3.1
6.5/10

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

EPSS Probability
0.98%

59.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CiscoSecure Firewall Threat Defense< 6.4.0.13
CiscoSecure Firewall Threat Defense>= 6.6.0, < 6.6.5
CiscoSecure Firewall Threat Defense>= 6.7.0, < 6.7.0.3
CiscoSecure Firewall Threat Defense>= 7.0.0, < 7.0.1
CiscoAdaptive Security Appliance Software>= 9.8.0, < 9.8.4.40
CiscoAdaptive Security Appliance Software>= 9.9.0, < 9.12.4.30
CiscoAdaptive Security Appliance Software>= 9.14.0, < 9.14.3.9
CiscoAdaptive Security Appliance Software>= 9.15.0, < 9.15.1.17
CiscoAdaptive Security Appliance Software>= 9.16.0, < 9.16.2
CiscoAsa 5512-X Firmware009.016\(001.025\)
CiscoAsa 5505 Firmware009.016\(001.025\)
CiscoAsa 5515-X Firmware009.016\(001.025\)
CiscoAsa 5525-X Firmware009.016\(001.025\)
CiscoAsa 5545-X Firmware009.016\(001.025\)
CiscoAsa 5555-X Firmware009.016\(001.025\)
CiscoAsa 5580 Firmware009.016\(001.025\)
CiscoAsa 5585-X Firmware009.016\(001.025\)

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-40125?
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) implementation of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to trigger a denial of service (DoS) condition on an affected device. This vulnerability is due to improper control of a resource. An attacker with the ability to spoof a trusted IKEv2 site-to-site VPN peer and in possession of valid IKEv2 credentials for that peer could exploit this vulnerability by sending malformed, authenticated IKEv2 messages to an affected device. A successful exploit could allow the attacker to trigger a reload of the device.
How severe is CVE-2021-40125?
CVE-2021-40125 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.98% probability of exploitation in the next 30 days.
How do I fix CVE-2021-40125?
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.

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Source: NVD / NIST