CVE-2015-2327
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.05%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 2.0
- 7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
- EPSS
- 4.05% probability · 90th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- pcre/perl compatible regular expression library
- Source
- cve@mitre.org
References
- http://rhn.redhat.com/errata/RHSA-2016-2750.html
- http://vcs.pcre.org/pcre/code/trunk/ChangeLog?view=markupExploit
- 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=1503Exploit
- 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=markupExploit
- 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=1503Exploit
- https://jira.mongodb.org/browse/SERVER-17252
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.