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CVE-2011-2665

5.0 · MEDIUM

reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.3 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a SIP pa…

Published Jul 6, 2011digiumEPSS 3.97%

Overview

CVE-2011-2665 is a medium-severity vulnerability affecting digium asterisk. It was published on July 6, 2011 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

reqresp_parser.c in the SIP channel driver in Asterisk Open Source 1.8.x before 1.8.4.3 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via a SIP packet with a Contact header that lacks a < (less than) character.

Remediation

Check the references section for vendor advisories and patches from digium. Update asterisk 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

References

Refdownloads.asterisk.org/pub/security/AST-2011-009-1.8.diffRefdownloads.asterisk.org/pub/security/AST-2011-009.htmlReflists.fedoraproject.org/pipermail/package-announce/2011-July/062628.htmlRefsecunia.com/advisories/45048Refsecunia.com/advisories/45201Refsecunia.com/advisories/45239Refwww.debian.org/security/2011/dsa-2276Refdownloads.asterisk.org/pub/security/AST-2011-009-1.8.diffRefdownloads.asterisk.org/pub/security/AST-2011-009.htmlReflists.fedoraproject.org/pipermail/package-announce/2011-July/062628.html

How CyberStrike helps

Frequently asked questions

What is CVE-2011-2665?

CVE-2011-2665 is a medium-severity vulnerability affecting digium asterisk. It was published on July 6, 2011 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2011-2665?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-2665?

Check the references section for vendor advisories and patches from digium. Update asterisk 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-2011-2665?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-2665 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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