Buffer overflow in Pcre Perl Compatible Regular Expression Library
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 impact via a crafted regular expression, as demonstrated by a JavaScript RegExp object encountered by Konqueror.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v2 metric
CVSS v2 base score 7.5 (High). Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.040 (90.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.040 · newest: 0.040 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.openwall.com/lists/oss-security/2015/11/29/1 (mailing-list)
- www.fortiguard.com/advisory/FG-VD-15-010/
- www.securityfocus.com/bid/74924 (vdb-entry)
- rhn.redhat.com/errata/RHSA-2016-2750.html (vendor-advisory)
- bugs.exim.org/show_bug.cgi (Exploit)
- jira.mongodb.org/browse/SERVER-17252
- vcs.pcre.org/pcre/code/trunk/ChangeLog (Exploit)
Frequently asked questions
- What is CVE-2015-2327?
- CVE-2015-2327 is a vulnerability in Pcre Perl Compatible Regular Expression Library, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2015-12-02.
- Is CVE-2015-2327 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.