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Fencer Intel
medium 5.0

CVE-2011-3200 json

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 thr…

published 2011-09-06 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-3164

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
20.8%
EPSS 20.8% chance of exploitation in 30 days, percentile 97%
public exploits
1
Metasploit

Summary

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.

Patch / fix

  • rsyslog Debian 14, Debian 13, Debian 12 5.8.5-1

debian advisories DEBIAN-CVE-2011-3200

  • rsyslog RHEL 6 4.6.2-3.el6_1.2
  • rsyslog-relp RHEL 6 4.6.2-3.el6_1.2
  • rsyslog-mysql RHEL 6 4.6.2-3.el6_1.2
  • rsyslog-pgsql RHEL 6 4.6.2-3.el6_1.2
  • rsyslog-gnutls RHEL 6 4.6.2-3.el6_1.2
  • rsyslog-gssapi RHEL 6 4.6.2-3.el6_1.2

red hat advisories RHSA-2011:1247

  • rsyslog openSUSE Tumbleweed 8.23.0-2.1

opensuse advisories openSUSE-SU-2024:10498-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-3200 updated cvss 2.9

rsyslog: parseLegacySyslogMsg off-by-two buffer overflow

  • Red Hat Enterprise Linux Server (v. 6) rsyslog 4.6.2-3.el6_1.2, rsyslog-relp 4.6.2-3.el6_1.2, rsyslog-mysql 4.6.2-3.el6_1.2, rsyslog-pgsql 4.6.2-3.el6_1.2, rsyslog-gnutls 4.6.2-3.el6_1.2, rsyslog-gssapi 4.6.2-3.el6_1.2
    fixed: vendor fix RHSA-2011:1247
  • Red Hat Enterprise Linux 5 rsyslog
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (Metasploit auxiliary/dos/syslog/rsyslog_long_tag)
  2. Published

Exploit prediction

20.76% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.