rsyslog: parseLegacySyslogMsg off-by-two buffer overflow
Published Sep 6, 2011
5.0
MEDIUMCVSS 2.0
EPSS 20.76%
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.
Affected products
No data.
Configuration 1
Configuration 2
- 5.2.0
- 5.2.1
- 5.2.2
- 5.3.1
- 5.3.2
- 5.3.3
- 5.3.4
- 5.3.5
- 5.3.6
- 5.3.7
- 5.4.0
- 5.4.1
- 5.4.2
- 5.5.0
- 5.5.1
- 5.5.2
- 5.5.3
- 5.5.4
- 5.5.5
- 5.5.6
- 5.5.7
- 5.6.0
- 5.6.1
- 5.6.2
- 5.6.3
- 5.6.4
- 5.6.5
- 5.7.0
- 5.7.1
- 5.7.2
- 5.7.3
- 5.7.4
- 5.7.5
- 5.7.6
- 5.7.7
- 5.7.8
- 5.7.9
- 5.7.10
- 5.8.0
- 5.8.1
- 5.8.2
- 5.8.3
- 5.8.4
No data.
Red Hat Enterprise Linux 6
rsyslog-0:4.6.2-3.el6_1.2
Fixed · RHSA-2011:1247
Red Hat Enterprise Linux 5
rsyslog
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | rsyslog-0:4.6.2-3.el6_1.2 | Fixed | RHSA-2011:1247 |
| Red Hat Enterprise Linux 5 | rsyslog | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 20.76% (0.20759) | 97.47th | v5 (v2026.06.15) |
| Jun 15, 2026 | 20.76% (0.20759) | 97.21th | v5 (v2026.06.15) |
| Jun 13, 2026 | 65.08% (0.65079) | 98.51th | v4 (v2025.03.14) |
| May 16, 2026 | 63.91% (0.63906) | 98.44th | v4 (v2025.03.14) |
| Oct 11, 2025 | 67.39% (0.67390) | 98.48th | v4 (v2025.03.14) |
| Jul 28, 2025 | 64.78% (0.64777) | 98.36th | v4 (v2025.03.14) |
| Mar 30, 2025 | 62.01% (0.62007) | 98.20th | v4 (v2025.03.14) |
| Mar 29, 2025 | 72.12% (0.72118) | 98.34th | v4 (v2025.03.14) |
| Mar 17, 2025 | 62.01% (0.62007) | 98.18th | v4 (v2025.03.14) |
| Dec 17, 2024 | 31.16% (0.31159) | 96.99th | v3 (v2023.03.01) |
| Apr 26, 2024 | 15.53% (0.15535) | 95.84th | v3 (v2023.03.01) |
| Apr 6, 2023 | 14.26% (0.14261) | 94.83th | v3 (v2023.03.01) |
| Mar 7, 2023 | 10.60% (0.10599) | 94.08th | v3 (v2023.03.01) |
| Mar 6, 2023 | 41.60% (0.41602) | 98.27th | v2 (v2022.01.01) |
| Oct 27, 2022 | 41.60% (0.41602) | 98.19th | v2 (v2022.01.01) |
| Feb 4, 2022 | 42.47% (0.42473) | 97.61th | v2 (v2022.01.01) |
References (15)
- http://git.adiscon.com/?p=rsyslog.git%3Ba=commit%3Bh=1ca6cc236d1dabf1633238b873fb1c057e52f95e x_refsource_CONFIRM
- http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065837.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065941.html vendor-advisoryx_refsource_FEDORA
- http://lists.opensuse.org/opensuse-updates/2011-09/msg00013.html vendor-advisoryx_refsource_SUSE
- http://secunia.com/advisories/45922 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/46027 third-party-advisoryx_refsource_SECUNIA
- http://securitytracker.com/id?1026000 vdb-entryx_refsource_SECTRACK
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:134 vendor-advisoryx_refsource_MANDRIVA
- http://www.redhat.com/support/errata/RHSA-2011-1247.html vendor-advisoryx_refsource_REDHAT
- http://www.rsyslog.com/potential-dos-with-malformed-tag/ x_refsource_CONFIRMPatchVendor Advisory
- http://www.securityfocus.com/bid/49413 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2011-3200 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=727644 x_refsource_CONFIRMPatchIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-3200
- https://www.cve.org/CVERecord?id=CVE-2011-3200
Change history (0)
No recorded changes yet.