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CVE-2011-1951

4.3 · MEDIUM

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 co…

Published Jul 11, 2011oneidentityCWE-399EPSS 2.46%

Overview

CVE-2011-1951 is a medium-severity vulnerability affecting oneidentity syslog-ng. It was published on July 11, 2011 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from oneidentity. Update syslog-ng to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
oneidentitysyslog-ng>= 0, < 3.2.4Affected

References

Refgit.balabit.hu/?p=bazsi/syslog-ng-3.2.git%3Ba=commit%3Bh=09710c0b105e579d35c7b5f6c66d1ea5e3a3d3ffReflists.fedoraproject.org/pipermail/package-announce/2011-June/062107.htmlRefsecunia.com/advisories/45122Refwww.openwall.com/lists/oss-security/2011/05/26/1Refwww.securityfocus.com/bid/47800Refbugzilla.redhat.com/show_bug.cgi?id=709088Refgit.balabit.hu/?p=bazsi/syslog-ng-3.2.git%3Ba=commit%3Bh=09710c0b105e579d35c7b5f6c66d1ea5e3a3d3ffReflists.fedoraproject.org/pipermail/package-announce/2011-June/062107.htmlRefsecunia.com/advisories/45122Refwww.openwall.com/lists/oss-security/2011/05/26/1

How CyberStrike helps

Frequently asked questions

What is CVE-2011-1951?

CVE-2011-1951 is a medium-severity vulnerability affecting oneidentity syslog-ng. It was published on July 11, 2011 and has a CVSS 2.0 base score of 4.3 (MEDIUM).

How severe is CVE-2011-1951?

This vulnerability has a CVSS 2.0 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-1951?

Check the references section for vendor advisories and patches from oneidentity. Update syslog-ng to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-1951?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-1951 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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