#VU62669 Missing Required Cryptographic Step in Cisco Adaptive Security Appliance (ASA) and Cisco Firewall Threat Defense (FTD) - CVE-2022-20742
Published: April 27, 2022
Vulnerability identifier: #VU62669
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2022-20742
CWE-ID: CWE-325
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerable software:
Cisco Adaptive Security Appliance (ASA)
Cisco Firewall Threat Defense (FTD)
Cisco Adaptive Security Appliance (ASA)
Cisco Firewall Threat Defense (FTD)
Software vendor:
Cisco Systems, Inc
Cisco Systems, Inc
Description
The vulnerability allows a remote attacker to read or modify data within an IPsec IKEv2 VPN tunnel.
The vulnerability exists due to improper implementation of Galois/Counter Mode (GCM) ciphers in an IPsec VPN library. A remote attacker can perform MitM attack by intercepting a sufficient number of encrypted messages across an affected IPsec IKEv2 VPN tunnel and then using cryptanalytic techniques to break the encryption.
Remediation
Install updates from vendor's website.