Cisco Security Advisory - Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IPsec IKEv2 VPN Information Disclosure Vulnerability

[Netwörkheäd]

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IPsec IKEv2 VPN Information Disclosure Vulnerability

<p>A vulnerability in an IPsec VPN library of Cisco&nbsp;Adaptive Security Appliance (ASA) Software and Cisco&nbsp;Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to read or modify data within an IPsec IKEv2 VPN tunnel.</p>
<p>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.</p>
<p>Cisco&nbsp;has released software updates that address this vulnerability. There are workarounds that address this vulnerability.</p>
<p>This advisory is available at the following link:<br><a href="https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ipsec-mitm-CKnLr4">https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-ipsec-mitm-CKnLr4</a></p>
<p>This advisory is part of the April 2022 release of the Cisco&nbsp;ASA, FTD, and FMC Security Advisory Bundled publication. For a complete list of the advisories and links to them, see <a href="https://tools.cisco.com/security/center/viewErp.x?alertId=ERP-74836">Cisco&nbsp;Event Response: April 2022 Cisco&nbsp;ASA, FMC, and FTD Software Security Advisory Bundled Publication</a>.</p>

     
         
Security Impact Rating:  High
   
   
       
CVE: CVE-2022-20742
Source: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software IPsec IKEv2 VPN Information Disclosure Vulnerability

[deanwebb]

This is a big deal, as IKEv2 was supposed to be safe. This isn't a vuln in IKEv2 itself, but the software around it. Get the patch, peeps.