CVE-2011-1951
MEDIUM · CVSS 4.3EPSS 2.5%EU EUVD
lib/logmatcher.c in Balabit syslog-ng before 3.2.4, when the global flag is set and when using PCRE 8.12 and possibly other versions, allows remote attackers to cause a denial of service (memory consumption) via a message that does not match a regular expression.
Key facts
- CVSS score
- 4.3 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:P- Weakness (CWE)
- CWE-399
- EPSS score
- 2.5% (85th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-1945)
- Published
- July 11, 2011
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-1945 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- oneidentity / syslog-ng
- pcre / pcre
References
- http://git.balabit.hu/?p=bazsi/syslog-ng-3.2.git%3Ba=commit%3Bh=09710c0b105e579d35c7b5f6c66d1ea5e3a3d3ff
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/062107.html(Mailing List, Third Party Advisory)
- http://secunia.com/advisories/45122(Third Party Advisory)
- http://www.openwall.com/lists/oss-security/2011/05/26/1(Mailing List, Patch, Third Party Advisory)
- http://www.securityfocus.com/bid/47800(Third Party Advisory, VDB Entry)
- https://bugzilla.redhat.com/show_bug.cgi?id=709088(Issue Tracking, Patch, Third Party Advisory)
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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