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
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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
- http://securitytracker.com/id?1022739Broken Link
- http://www.cisco.com/en/US/products/products_security_advisory09186a0080af150f.shtmlPatch, Vendor Advisory
- 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
- Last Modified
- Status
- Analyzed
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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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