medium
5.3
CWE
416
Advisory Published

cisco-sa-asaftd-ikev2-dos-g4cmrr7C: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IKEv2 Site-to-Site VPN Denial of Service Vulnerability

First published: Wed Oct 27 2021(Updated: )

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. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ikev2-dos-g4cmrr7C This advisory is part of the October 2021 release of the Cisco ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see Cisco Event Response: October 2021 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication.

Credit: This vulnerability was found by Santosh Krishnamurthy Cisco during internal security testing

Affected SoftwareAffected VersionHow to fix
Cisco ASA Software=9.16<9.16.2=9.15<9.15.1.17>=9.13<=9.14<9.14.3.9>=9.9=9.10<=9.12<9.12.4.30=9.8<9.8.4.40
9.16.2
9.15.1.17
9.14.3.9
9.12.4.30
9.8.4.40
Cisco FTD Software>=6.5.0=6.6.0<=6.7.0<6.7.0.3 (Jan 2022)>=6.2.2 and earlier=6.2.3=6.3.0<=6.4.0<6.4.0.13 (Nov 2021)
6.7.0.3 (Jan 2022)
6.4.0.13 (Nov 2021)

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(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this Cisco ASA and FTD vulnerability?

    The vulnerability ID for this Cisco ASA and FTD vulnerability is cisco-sa-asaftd-ikev2-dos-g4cmrr7C.

  • What is the severity rating of cisco-sa-asaftd-ikev2-dos-g4cmrr7C?

    The severity rating of cisco-sa-asaftd-ikev2-dos-g4cmrr7C is medium (5.3).

  • What is the affected software for cisco-sa-asaftd-ikev2-dos-g4cmrr7C?

    The affected software for cisco-sa-asaftd-ikev2-dos-g4cmrr7C are Cisco ASA Software versions 9.8.4.40 to 9.16.2 and Cisco FTD Software versions 6.2.2 and earlier, 6.3.0 to 6.7.0.3.

  • How can an authenticated, remote attacker exploit this vulnerability?

    An authenticated, remote attacker can exploit this vulnerability by triggering a denial of service (DoS) condition on an affected device.

  • How can I fix the cisco-sa-asaftd-ikev2-dos-g4cmrr7C vulnerability?

    To fix the cisco-sa-asaftd-ikev2-dos-g4cmrr7C vulnerability, upgrade to the recommended software versions: Cisco ASA Software 9.16.2, 9.15.1.17, 9.14.3.9, 9.12.4.30, or 9.8.4.40, and Cisco FTD Software 6.7.0.3 (Jan 2022) or 6.4.0.13 (Nov 2021).

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