CVE-2009-2055 on CISA KEV

Cisco IOS XR 3.4.0 through 3.8.1 allows remote attackers to cause a denial of service (session reset) via a BGP UPDATE message with an invalid attribute, as demonstrated in the wild on 17 August 2009.

01What CISA says about this vulnerability

Cisco IOS XR 3.4.0 through 3.8.1 allows remote attackers to cause a denial of service (session reset) via a BGP UPDATE message with an invalid attribute, as demonstrated in the wild on 17 August 2009.

02Required action — verbatim from CISA

Apply updates per vendor instructions.

03Notes & references

• mailman.nanog.org — http://mailman.nanog.org/pipermail/nanog/2009-August/012719.html
• securitytracker.com — http://securitytracker.com/id?1022739
• www.cisco.com — http://www.cisco.com/en/US/products/products_security_advisory09186a0080af150f.s…

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

Vendor	Product	Versions
n	a / n/a	n/a

06Detection

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