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CVE-2015-2327

7.5 · HIGH

PCRE before 8.36 mishandles the /(((a\2)|(a*)\g<-1>))*/ pattern and related patterns with certain internal recursive back references, which allows remote attackers to cause a denial of service (seg…

Published Dec 2, 2015pcreCWE-119EPSS 4.05%

Overview

CVE-2015-2327 is a high-severity vulnerability affecting pcre perl_compatible_regular_expression_library. It was published on December 2, 2015 and has a CVSS 2.0 base score of 7.5 (HIGH).

This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

PCRE before 8.36 mishandles the /(((a\2)|(a*)\g<-1>))*/ pattern and related patterns with certain internal recursive back references, which allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.

Remediation

Check the references section for vendor advisories and patches from pcre. Update perl_compatible_regular_expression_library 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
pcreperl_compatible_regular_expression_library0Affected

References

Refrhn.redhat.com/errata/RHSA-2016-2750.htmlRefvcs.pcre.org/pcre/code/trunk/ChangeLog?view=markupRefwww.fortiguard.com/advisory/FG-VD-15-010/Refwww.openwall.com/lists/oss-security/2015/11/29/1Refwww.securityfocus.com/bid/74924Refbugs.exim.org/show_bug.cgi?id=1503Refjira.mongodb.org/browse/SERVER-17252Refrhn.redhat.com/errata/RHSA-2016-2750.htmlRefvcs.pcre.org/pcre/code/trunk/ChangeLog?view=markupRefwww.fortiguard.com/advisory/FG-VD-15-010/

How CyberStrike helps

Frequently asked questions

What is CVE-2015-2327?

CVE-2015-2327 is a high-severity vulnerability affecting pcre perl_compatible_regular_expression_library. It was published on December 2, 2015 and has a CVSS 2.0 base score of 7.5 (HIGH).

How severe is CVE-2015-2327?

This vulnerability has a CVSS 2.0 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2015-2327?

Check the references section for vendor advisories and patches from pcre. Update perl_compatible_regular_expression_library 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-2015-2327?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2015-2327 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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