SB2022101734 - Denial of service in Junos OS and Junos OS Evolved BGP implementation
Published: October 17, 2022
Security Bulletin ID
SB2022101734
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) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2022-22220)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a race condition in Routing Protocol Daemon (rpd) when handling BGP traffic. When a BGP flow route with redirect IP extended community is received, and the reachability to the next-hop of the corresponding redirect IP is flapping, the rpd process might crash.
Remediation
Install update from vendor's website.