SB2022021621 - Denial of service in Cisco AsyncOS for Cisco Email Security Appliance
Published: February 16, 2022
Security Bulletin ID
SB2022021621
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource management error (CVE-ID: CVE-2022-20653)
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.
Remediation
Install update from vendor's website.