Resource management error in Cisco AsyncOS for Cisco Email Security Appliance - CVE-2022-20653
Published: February 16, 2022
Vulnerability identifier: #VU60660
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2022-20653
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources in the DNS-based Authentication of Named Entities (DANE) email verification component when handling DNS name resolution. A remote attacker can send a specially crafted email message to the system and perform a denial of service (DoS) attack.
Affected software
Cisco AsyncOS for Cisco Email Security Appliance
How to mitigate CVE-2022-20653
Install updates from vendor's website.
Cisco AsyncOS for Cisco Email Security Appliance - addressed in versions 13.0.3, 13.5.4.102, 14.0.2.020