CVE-2009-2055

MediumCVSS 5.9/10Known exploited (CISA KEV)Last modified Jun 16, 2026

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.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-20

Affected software

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

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

Timeline

Published: Aug 19, 2009
Last modified: Jun 16, 2026
Added to CISA KEV: Mar 25, 2022
NVD status: Analyzed

Related CVEs from 2009

CVE-2009-20563.3Cisco IOS XR 3.8.1 and earlier allows remote authenticated users to cause a denial of service (process crash) via vectors involving a BGP UP CVE-2009-20575.8Microsoft Internet Explorer before 8 uses the HTTP Host header to determine the context of a document provided in a (1) 4xx or (2) 5xx CONNE CVE-2009-20586.8Apple Safari before 3.2.2 uses the HTTP Host header to determine the context of a document provided in a (1) 4xx or (2) 5xx CONNECT response CVE-2009-20596.8Opera, possibly before 9.25, uses the HTTP Host header to determine the context of a document provided in a (1) 4xx or (2) 5xx CONNECT respo CVE-2009-20605.8src/net/http/http_transaction_winhttp.cc in Google Chrome before 1.0.154.53 uses the HTTP Host header to determine the context of a document CVE-2009-20619.3Mozilla Firefox before 3.0.10 processes a 3xx HTTP CONNECT response before a successful SSL handshake, which allows man-in-the-middle attack CVE-2009-20626.8Apple Safari before 3.2.2 processes a 3xx HTTP CONNECT response before a successful SSL handshake, which allows man-in-the-middle attackers CVE-2009-20636.8Opera, possibly before 9.25, processes a 3xx HTTP CONNECT response before a successful SSL handshake, which allows man-in-the-middle attacke CVE-2009-20646.8Microsoft Internet Explorer 8, and possibly other versions, detects http content in https web pages only when the top-level frame uses https CVE-2009-20656.8Mozilla Firefox 3.0.10, and possibly other versions, detects http content in https web pages only when the top-level frame uses https, which CVE-2009-20666.8Apple Safari detects http content in https web pages only when the top-level frame uses https, which allows man-in-the-middle attackers to e CVE-2009-20676.8Opera detects http content in https web pages only when the top-level frame uses https, which allows man-in-the-middle attackers to execute