VIR Vulnerability Intelligence Relay

CVE-2011-5129

medium
Published 2012-08-30 · Modified 2026-04-29
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
—
CVSS v4 NEW
—
not yet in upstream
VIR risk
6.0

Description

Heap-based buffer overflow in XChat 2.8.9 and earlier allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long response string.

Predictions

Exploit likelihood
20%
Patch ETA
—

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 with source_tier=community-verified.

Exploits

Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.

Exploit-DB

EDB-18159 dos linux verified
Jane Doe · 2011-11-25

XChat 2.8.9 - Heap Overflow Denial of Service

Source code queued for fetch — refresh in a moment.

Application impact
VendorProductVersionsFixed
xchatxchat{"endIncluding":"2.8.9"}
xchatxchat1.2.1
xchatxchat1.3.9
xchatxchat1.3.10
xchatxchat1.3.11
xchatxchat1.3.12
xchatxchat1.3.13
xchatxchat1.4
xchatxchat1.4.1
xchatxchat1.4.2
xchatxchat1.4.3
xchatxchat1.5.6
xchatxchat1.8.0
xchatxchat1.8.1
xchatxchat1.8.2
xchatxchat1.8.3
xchatxchat1.8.4
xchatxchat1.8.5
xchatxchat1.8.6
xchatxchat1.8.7
xchatxchat1.8.8
xchatxchat1.8.9
xchatxchat1.9.0
xchatxchat1.9.1
xchatxchat1.9.2
xchatxchat1.9.3
xchatxchat1.9.4
xchatxchat1.9.5
xchatxchat1.9.6
xchatxchat1.9.7
xchatxchat1.9.8
xchatxchat1.9.9
xchatxchat2.0.0
xchatxchat2.0.1
xchatxchat2.0.2
xchatxchat2.0.3
xchatxchat2.0.4
xchatxchat2.0.5
xchatxchat2.0.6
xchatxchat2.0.7
xchatxchat2.0.8
xchatxchat2.6.7
xchatxchat2.8.0
xchatxchat2.8.1
xchatxchat2.8.3
xchatxchat2.8.4
xchatxchat2.8.5
xchatxchat2.8.6
xchatxchat2.8.7
xchatxchat2.8.7b
xchatxchat2.8.8

References

CWEs

CWE-119

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.