VulnerabilityAnalyzed
CVE-2009-2055
Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability
KEVMEDIUM 5.9EPSS 3.33%
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 15 April 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.33% probability · 88th percentile
- CISA KEV
- Listed 25 March 2022 · due 15 April 2022
- Weakness
- CWE-20
- Affected
- cisco/ios xr
- Source
- psirt@cisco.com
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2009-2055
References
- http://mailman.nanog.org/pipermail/nanog/2009-August/012719.htmlMailing List
- http://securitytracker.com/id?1022739Broken Link
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080af150f.shtmlPatch, Vendor Advisory
- http://mailman.nanog.org/pipermail/nanog/2009-August/012719.htmlMailing List
- http://securitytracker.com/id?1022739Broken Link
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080af150f.shtmlPatch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-2055US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.