Cisco Email Security Appliance Resource Management Error Vulnerability (CNVD-2022-13368)

The Cisco Email Security Appliance (ESA) is an email security appliance from Cisco, U.S.A. A resource management error vulnerability exists in the Cisco Email Security Appliance DNS Verification, which could be exploited by an attacker to cause the appliance to be inaccessible from the management interface to access or process other email messages for a period of time until the appliance recovers, resulting in a DoS condition.