Attackers Can Crash Cisco Email Security Appliances by Sending Malicious Emails

Attackers Can Crash Cisco Email Security Appliances by Sending Malicious Emails

Cisco has released security updates to contain three vulnerabilities affecting its products, including one high-severity flaw in its Email Security Appliance (ESA) that could result in a denial-of-service (DoS) condition on an affected device. The weakness, assigned the identifier CVE-2022-20653 (CVSS score: 7.5), stems from a case of insufficient error handling in DNS name resolution that could