rsyslog: DoS due integer signedness error while extending rsyslog counted string buffer
Published Sep 25, 2012
2.1
LOWCVSS 2.0
EPSS 0.42%
Description
Integer overflow in the rsCStrExtendBuf function in runtime/stringbuf.c in the imfile module in rsyslog 4.x before 4.6.6, 5.x before 5.7.4, and 6.x before 6.1.4 allows local users to cause a denial of service (daemon hang) via a large file, which triggers a heap-based buffer overflow.
Affected products
No data.
Configuration 1
- 4.1.0
- 4.1.1
- 4.1.2
- 4.1.3
- 4.1.4
- 4.1.5
- 4.1.6
- 4.1.7
- 4.2.0
- 4.3.0
- 4.3.1
- 4.3.2
- 4.4.0
- 4.4.1
- 4.4.2
- 4.5.0
- 4.5.1
- 4.5.2
- 4.5.3
- 4.5.4
- 4.5.5
- 4.5.6
- 4.5.7
- 4.5.8
- 4.6.0
- 4.6.1
- 4.6.2
- 4.6.3
- 4.6.4
- 4.6.5
Configuration 2
- 5.1.0
- 5.1.1
- 5.1.2
- 5.1.3
- 5.1.4
- 5.1.5
- 5.1.6
- 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
No data.
Red Hat Enterprise Linux 6
rsyslog-0:5.8.10-2.el6
Fixed · RHSA-2012:0796
Red Hat Enterprise Linux 5
rsyslog
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | rsyslog-0:5.8.10-2.el6 | Fixed | RHSA-2012:0796 |
| 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:L/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 (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.42% (0.00420) | 33.95th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.42% (0.00420) | 33.31th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.09% (0.00090) | 23.48th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.28% (0.01282) | 68.34th | v2 (v2022.01.01) |
| Feb 13, 2023 | 1.28% (0.01282) | 67.79th | v2 (v2022.01.01) |
| Feb 3, 2023 | 1.55% (0.01547) | 74.40th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.28% (0.01282) | 65.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.28% (0.01282) | 41.72th | v2 (v2022.01.01) |
References (15)
- http://bugzilla.adiscon.com/show_bug.cgi?id=221 x_refsource_CONFIRM
- http://git.adiscon.com/?p=rsyslog.git%3Ba=commit%3Bh=6bad782f154b7f838c7371bf99c13f6dc4ec4101 x_refsource_CONFIRM
- http://rsyslog.com/changelog-for-4-6-6-v4-stable/ x_refsource_CONFIRM
- http://rsyslog.com/changelog-for-5-7-4-v5-beta/ x_refsource_CONFIRM
- http://rsyslog.com/changelog-for-6-1-4-devel/ x_refsource_CONFIRM
- http://secunia.com/advisories/45848 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/47698 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.openwall.com/lists/oss-security/2011/12/22/2 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/bid/51171 vdb-entryx_refsource_BID
- http://www.securitytracker.com/id?1026556 vdb-entryx_refsource_SECTRACK
- http://www.ubuntu.com/usn/USN-1338-1 vendor-advisoryx_refsource_UBUNTUPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2011-4623 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=769822 x_refsource_MISCIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-4623
- https://www.cve.org/CVERecord?id=CVE-2011-4623
Change history (0)
No recorded changes yet.