What’s Vulnerable › Vulnerabilities

CVE-2015-2327

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2015-12-02 · updated 2026-06-17
• Weakness: CWE-119

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.

Affected products

• PCRE Perl Compatible Regular Expression Library: through 8.35

References

• http://rhn.redhat.com/errata/RHSA-2016-2750.html
• http://vcs.pcre.org/pcre/code/trunk/ChangeLog?view=markup
• http://www.fortiguard.com/advisory/FG-VD-15-010/
• http://www.openwall.com/lists/oss-security/2015/11/29/1
• http://www.securityfocus.com/bid/74924
• https://bugs.exim.org/show_bug.cgi?id=1503
• https://jira.mongodb.org/browse/SERVER-17252
• http://rhn.redhat.com/errata/RHSA-2016-2750.html
• http://vcs.pcre.org/pcre/code/trunk/ChangeLog?view=markup
• http://www.fortiguard.com/advisory/FG-VD-15-010/
• http://www.openwall.com/lists/oss-security/2015/11/29/1
• http://www.securityfocus.com/bid/74924

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