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CVE-2006-3121

5.0 · MEDIUM

The peel_netstring function in cl_netstring.c in the heartbeat subsystem in High-Availability Linux before 1.2.5, and 2.0 before 2.0.7, allows remote attackers to cause a denial of service (crash)…

Published Aug 17, 2006high_availability_linux_projectCWE-399EPSS 13.59%

Overview

CVE-2006-3121 is a medium-severity vulnerability affecting high_availability_linux_project heartbeat. It was published on August 17, 2006 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

The peel_netstring function in cl_netstring.c in the heartbeat subsystem in High-Availability Linux before 1.2.5, and 2.0 before 2.0.7, allows remote attackers to cause a denial of service (crash) via the length parameter in a heartbeat message.

Remediation

Check the references section for vendor advisories and patches from high_availability_linux_project. Update heartbeat 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

Refsecunia.com/advisories/21505Refsecunia.com/advisories/21511Refsecunia.com/advisories/21518Refsecunia.com/advisories/21521Refsecunia.com/advisories/21629Refsecurity.gentoo.org/glsa/glsa-200608-23.xmlRefwww.debian.org/security/2006/dsa-1151Refwww.linux-ha.org/SecurityIssuesRefwww.linux-ha.org/_cache/SecurityIssues__sec03.txtRefwww.mandriva.com/security/advisories?name=MDKSA-2006:142

How CyberStrike helps

Frequently asked questions

What is CVE-2006-3121?

CVE-2006-3121 is a medium-severity vulnerability affecting high_availability_linux_project heartbeat. It was published on August 17, 2006 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2006-3121?

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-2006-3121?

Check the references section for vendor advisories and patches from high_availability_linux_project. Update heartbeat 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-2006-3121?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2006-3121 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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