Vulnerability CVE-2015-3217
Published: 2016-12-13

Description:
PCRE 7.8 and 8.32 through 8.37, and PCRE2 10.10 mishandle group empty matches, which might allow remote attackers to cause a denial of service (stack-based buffer overflow) via a crafted regular expression, as demonstrated by /^(?:(?(1)\\.|([^\\\\W_])?)+)+$/.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
PCRE Library Call Stack Overflow Vulnerability in match()
Wen Guanxing
03.06.2015

Type:

CWE-119

 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
PCRE -> PCRE 
PCRE -> Pcre2 
IBM -> Powerkvm 

 References:
http://rhn.redhat.com/errata/RHSA-2016-1025.html
http://rhn.redhat.com/errata/RHSA-2016-2750.html
http://vcs.pcre.org/pcre?view=revision&revision=1566
http://www-01.ibm.com/support/docview.wss?uid=isg3T1023886
http://www.openwall.com/lists/oss-security/2015/06/03/7
http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
http://www.securityfocus.com/bid/75018
https://access.redhat.com/errata/RHSA-2016:1132
https://bugs.exim.org/show_bug.cgi?id=1638
https://bugzilla.redhat.com/show_bug.cgi?id=1228283
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