CVE-2011-1951

Name: CVE-2011-1951
Creator: NVD / NIST
Published: 2011-07-11T20:55:01.207+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.46%

Last modified Jun 16, 2026

CVE-2011-1951 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.46% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

2.46%

82.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-399

Affected Software

Vendor	Product	Versions
Oneidentity	Syslog-Ng	< 3.2.4

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.htmlMailing List, Third Party Advisory
http://secunia.com/advisories/45122Third Party Advisory
http://www.openwall.com/lists/oss-security/2011/05/26/1Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/47800Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=709088Issue Tracking, Patch, Third Party Advisory
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.htmlMailing List, Third Party Advisory
http://secunia.com/advisories/45122Third Party Advisory
http://www.openwall.com/lists/oss-security/2011/05/26/1Mailing List, Patch, Third Party Advisory
http://www.securityfocus.com/bid/47800Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=709088Issue Tracking, Patch, Third Party Advisory

Timeline

Published: Jul 11, 2011
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-1951?

How severe is CVE-2011-1951?

Severity scoring for CVE-2011-1951 is pending analysis. The EPSS model estimates a 2.46% probability of exploitation in the next 30 days.

How do I fix CVE-2011-1951?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-1951?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST