CVE Vulnerability Advisory Database
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2009-08-19
Cisco IOS XR BGP UPDATE Attribute Validation Denial of Service Vulnerability (CVE-2009-2055)
[Affected Scope] Cisco IOS XR Software versions 3.4.0 through 3.8.1 running on routing platforms
[Impact] Remote attackers can trigger a denial of service (BGP session reset) by sending a crafted BGP UPDATE message with an invalid attribute, leading to routing instability
[Mitigation] Apply official Cisco software patches or implement infrastructure ACLs and BGP TTL Security to restrict unauthorized BGP peer connections