cisco-sa-asaftd-ipsec-mitm-CKnLr4: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IPsec IKEv2 VPN Information Disclosure Vulnerability
First published: Wed Apr 27 2022(Updated: )
A vulnerability in an IPsec VPN library of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to read or modify data within an IPsec IKEv2 VPN tunnel. This vulnerability is due to an improper implementation of Galois/Counter Mode (GCM) ciphers. An attacker in a man-in-the-middle position could exploit this vulnerability by intercepting a sufficient number of encrypted messages across an affected IPsec IKEv2 VPN tunnel and then using cryptanalytic techniques to break the encryption. A successful exploit could allow the attacker to decrypt, read, modify, and re-encrypt data that is transmitted across an affected IPsec IKEv2 VPN tunnel. Cisco has released software updates that address this vulnerability. There are 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-ipsec-mitm-CKnLr4 This advisory is part of the April 2022 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: April 2022 Cisco ASA, FMC, and FTD Software Security Advisory Bundled Publication.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco ASA Software | =9.16<9.16.2.7=9.15<9.15.1.21>=9.13<=9.14<9.14.3.13=9.12<9.12.4.37 | 9.16.2.7 9.15.1.21 9.14.3.13 9.12.4.37 |
| Cisco FTD Software | >=6.5.0=6.6.0<=6.7.0<Cisco_FTD_Hotfix_AA-6.7.0.4-2.sh.REL.tarCisco_FTD_SSP_FP1K_Hotfix_AA-6.7.0.4-2.sh.REL.tarCisco_FTD_SSP_FP2K_Hotfix_AA-6.7.0.4-2.sh.REL.tarCisco_FTD_SSP_Hotfix_AA-6.7.0.4-2.sh.REL.tar=6.4.0<6.4.0.13 | Cisco_FTD_Hotfix_AA-6.7.0.4-2.sh.REL.tarCisco_FTD_SSP_FP1K_Hotfix_AA-6.7.0.4-2.sh.REL.tarCisco_FTD_SSP_FP2K_Hotfix_AA-6.7.0.4-2.sh.REL.tarCisco_FTD_SSP_Hotfix_AA-6.7.0.4-2.sh.REL.tar 6.4.0.13 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this Cisco ASA and FTD IPsec vulnerability?
The vulnerability ID for this Cisco ASA and FTD IPsec vulnerability is cisco-sa-asaftd-ipsec-mitm-CKnLr4.
What is the severity of vulnerability cisco-sa-asaftd-ipsec-mitm-CKnLr4?
The severity of vulnerability cisco-sa-asaftd-ipsec-mitm-CKnLr4 is high with a severity score of 7.4.
Which software versions are affected by vulnerability cisco-sa-asaftd-ipsec-mitm-CKnLr4?
The affected software versions for vulnerability cisco-sa-asaftd-ipsec-mitm-CKnLr4 are Cisco ASA Software versions 9.12.4.37 to 9.16.2.7, and Cisco FTD Software versions 6.4.0 to 6.7.0.
How can an attacker exploit this vulnerability?
An unauthenticated, remote attacker can exploit this vulnerability by reading or modifying data within an IPsec IKEv2 VPN tunnel.
What is the recommended remedy for vulnerability cisco-sa-asaftd-ipsec-mitm-CKnLr4?
For Cisco ASA Software, upgrade to versions 9.16.2.7, 9.15.1.21, 9.14.3.13, or 9.12.4.37. For Cisco FTD Software, apply Hotfix AA-6.7.0.4-2.sh.REL.tar or upgrade to versions 6.4.0.13 or later.
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