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CVE-2006-3121

The peel_netstring function in cl_netstring.c in the heartbeat subsystem in High-Availability...

5.0 MediumPublic exploitFix available

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.

Exploit likelihood

13.6%Up 1.0 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 5.0

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.

Record
CVE-2006-3121
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-399
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2006-3121
Updated
2026-11-02
EUVDEUVD-2006-3118 No score

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.

Record
EUVD-2006-3118
Updated
2026-11-03
GitHub AdvisoriesGHSA-qj99-gqqj-q94c No score

The peel_netstring function in cl_netstring.c in the heartbeat subsystem in High-Availability...

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.

Record
GHSA-qj99-gqqj-q94c
Updated
2026-11-02
OSV No score

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.

Record
CVE-2006-3121
Updated
2026-11-02
OSVDEBIAN-CVE-2006-3121 No score

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.

Record
DEBIAN-CVE-2006-3121
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
heartbeat
Debian:12
 before 1.2.4-14
1.2.4-14
heartbeat
Debian:13
 before 1.2.4-14
1.2.4-14
heartbeat
Debian:14
 before 1.2.4-14
1.2.4-14
heartbeat
Debian:3.1
 before 1.2.3-9sarge6, plus listed versions
1.2.3-91.2.3-9sarge11.2.3-9sarge21.2.3-9sarge31.2.3-9sarge41.2.3-9sarge5
1.2.3-9sarge6

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
Exploit-DBLinux-HA Heartbeat 2.0.6 - Remote Denial of Service2006-08-13

History

History
RecordedChangedSources
aliasesEUVD
first indexedCVE List, Exploit-DB, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2006-3121 is a medium vulnerability (CVSS 5.0) in High Availability Linux Project Heartbeat, published August 15, 2006. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 13.6%, the 96th percentile. Fixed in heartbeat 1.2.4-14.

References

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