VIR Vulnerability Intelligence Relay

CVE-2011-3200

medium
Published 2011-09-06 · Modified 2026-04-29
💬 Discuss on Community ✚ Propose mitigation
CVSS v3
—
CVSS v4 NEW
—
not yet in upstream
VIR risk
6.0

Description

Stack-based buffer overflow in the parseLegacySyslogMsg function in tools/syslogd.c in rsyslogd in rsyslog 4.6.x before 4.6.8 and 5.2.0 through 5.8.4 might allow remote attackers to cause a denial of service (application exit) via a long TAG in a legacy syslog message.

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.

Metasploit modules

auxiliary_dos/syslog/rsyslog_long_tag rank 300
rsyslog Long Tag Off-By-Two DoS
Source fetch failed: fetch_error — view the original via the link above.

OS impact
debian Debian Fixed 5 releases
VersionStatusFixed in
trixie Fixed 5.8.5-1
sid Fixed 5.8.5-1
forky Fixed 5.8.5-1
bullseye Fixed 5.8.5-1
bookworm Fixed 5.8.5-1

Application impact
VendorProductVersionsFixed
rsyslogrsyslog4.6.0
rsyslogrsyslog4.6.1
rsyslogrsyslog4.6.2
rsyslogrsyslog4.6.3
rsyslogrsyslog4.6.4
rsyslogrsyslog4.6.5
rsyslogrsyslog4.6.6
rsyslogrsyslog4.6.7
rsyslogrsyslog5.2.0
rsyslogrsyslog5.2.1
rsyslogrsyslog5.2.2
rsyslogrsyslog5.3.1
rsyslogrsyslog5.3.2
rsyslogrsyslog5.3.3
rsyslogrsyslog5.3.4
rsyslogrsyslog5.3.5
rsyslogrsyslog5.3.6
rsyslogrsyslog5.3.7
rsyslogrsyslog5.4.0
rsyslogrsyslog5.4.1
rsyslogrsyslog5.4.2
rsyslogrsyslog5.5.0
rsyslogrsyslog5.5.1
rsyslogrsyslog5.5.2
rsyslogrsyslog5.5.3
rsyslogrsyslog5.5.4
rsyslogrsyslog5.5.5
rsyslogrsyslog5.5.6
rsyslogrsyslog5.5.7
rsyslogrsyslog5.6.0
rsyslogrsyslog5.6.1
rsyslogrsyslog5.6.2
rsyslogrsyslog5.6.3
rsyslogrsyslog5.6.4
rsyslogrsyslog5.6.5
rsyslogrsyslog5.7.0
rsyslogrsyslog5.7.1
rsyslogrsyslog5.7.2
rsyslogrsyslog5.7.3
rsyslogrsyslog5.7.4
rsyslogrsyslog5.7.5
rsyslogrsyslog5.7.6
rsyslogrsyslog5.7.7
rsyslogrsyslog5.7.8
rsyslogrsyslog5.7.9
rsyslogrsyslog5.7.10
rsyslogrsyslog5.8.0
rsyslogrsyslog5.8.1
rsyslogrsyslog5.8.2
rsyslogrsyslog5.8.3
rsyslogrsyslog5.8.4

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.