SB2022092918 - Denial of service in Cisco IOS XE Software
Published: September 29, 2022
Security Bulletin ID
SB2022092918
Severity
High
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) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2022-20837)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a logic error in the DNS application layer gateway (ALG) functionality that is used by Network Address Translation (NAT). A remote attacker can send specially crafted DNS packets and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.