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CVE-2009-2056

3.3 · LOW

Cisco IOS XR 3.8.1 and earlier allows remote authenticated users to cause a denial of service (process crash) via vectors involving a BGP UPDATE message with many AS numbers prepended to the AS path.

Published Aug 21, 2009ciscoCWE-264EPSS 1.34%

Overview

CVE-2009-2056 is a low-severity vulnerability affecting cisco ios_xr. It was published on August 21, 2009 and has a CVSS 2.0 base score of 3.3 (LOW).

This vulnerability has a CVSS 2.0 base score of 3.3, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Cisco IOS XR 3.8.1 and earlier allows remote authenticated users to cause a denial of service (process crash) via vectors involving a BGP UPDATE message with many AS numbers prepended to the AS path.

Remediation

Check the references section for vendor advisories and patches from cisco. Update ios_xr to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
ciscoios_xr0Affected

References

Refsecuritytracker.com/id?1022756Refwww.cisco.com/en/US/products/products_security_advisory09186a0080af150f.shtmlRefsecuritytracker.com/id?1022756Refwww.cisco.com/en/US/products/products_security_advisory09186a0080af150f.shtml

How CyberStrike helps

Frequently asked questions

What is CVE-2009-2056?

CVE-2009-2056 is a low-severity vulnerability affecting cisco ios_xr. It was published on August 21, 2009 and has a CVSS 2.0 base score of 3.3 (LOW).

How severe is CVE-2009-2056?

This vulnerability has a CVSS 2.0 base score of 3.3, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2009-2056?

Check the references section for vendor advisories and patches from cisco. Update ios_xr to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-2056?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-2056 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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