CVE-2009-2055
Last modified
CVE-2009-2055 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 3.33% chance of exploitation in the next 30 days.
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
Exploitation Status
This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by .
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Ios Xr | 3.4 |
| Cisco | Ios Xr | 3.4.0 |
| Cisco | Ios Xr | 3.4.1 |
| Cisco | Ios Xr | 3.4.2 |
| Cisco | Ios Xr | 3.4.3 |
| Cisco | Ios Xr | 3.5 |
| Cisco | Ios Xr | 3.5.2 |
| Cisco | Ios Xr | 3.5.3 |
| Cisco | Ios Xr | 3.5.4 |
| Cisco | Ios Xr | 3.6.0 |
| Cisco | Ios Xr | 3.6.1 |
| Cisco | Ios Xr | 3.6.2 |
| Cisco | Ios Xr | 3.6.3 |
| Cisco | Ios Xr | 3.7.0 |
| Cisco | Ios Xr | 3.7.1 |
| Cisco | Ios Xr | 3.7.2 |
| Cisco | Ios Xr | 3.7.3 |
| Cisco | Ios Xr | 3.8.0 |
| Cisco | Ios Xr | 3.8.1 |
References
- https://securitytracker.com/id?1022739Broken Link
- https://www.cisco.com/en/US/products/products_security_advisory09186a0080af150f.shtmlPatch, Vendor Advisory
- https://securitytracker.com/id?1022739Broken Link
- https://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
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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