CVEs / CVE-2009-2055
CVE-2009-2055: Cisco IOS XR Border Gateway Protocol (BGP) Denial-of-Service Vulnerability
- Known exploited in the CISA KEV catalog since 25 Mar 2022
- medium 4.3 CVSS 2.0 (NVD)
- EPSS 3.31% chance of exploitation in the next 30 days, higher than 88% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Cisco IOS XR,when BGP is the configured routing feature, allows remote attackers to cause a denial-of-service (DoS).
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a n/a | n/a | — |
Exploitation
| In CISA KEV since | 25 Mar 2022 |
|---|---|
| Due date for US federal agencies | 15 Apr 2022 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 2.0 | 4.3 mediumAV:N/AC:M/Au:N/C:N/I:N/A:PScored by NVD |
|---|---|
| Weakness | CWE-20 |
References
- CVE-2009-2055 on NVD
- CVE-2009-2055 in the CISA KEV catalog
- http://mailman.nanog.org/pipermail/nanog/2009-August/012719.html Mailing List
- http://securitytracker.com/id?1022739 Broken Link
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080af150f.shtml Patch, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-2055 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.