SB2021032918 - Denial of service in Cisco IOS XE
Published: March 29, 2021
Security Bulletin ID
SB2021032918
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) Improper Check for Unusual or Exceptional Conditions (CVE-ID: CVE-2021-1446)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a logic error that occurs when an affected device inspects certain DNS packets. A remote attacker can send specially crafted DNS packets and cause denial of service condition.
Remediation
Install update from vendor's website.