SB2023030930 - Denial of service in Cisco IOS XR Software for ASR 9000 Series Routers
Published: March 9, 2023
Security Bulletin ID
SB2023030930
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) Input validation error (CVE-ID: CVE-2023-20049)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the incorrect handling of malformed BFD packets that are received on line cards where the bidirectional forwarding detection (BFD) hardware offload feature is enabled. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.