Vulnerability identifier: #VU87890

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-2327

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PCRE
Universal components / Libraries / Libraries used by multiple products

Vendor:

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to PCRE mishandles the /(((a2)|(a*)g<-1>))*/ pattern and related patterns with certain internal recursive back references. A remote attacker can cause a denial of service (segmentation fault) or possibly have unspecified other impact via a crafted regular expression.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

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External links
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
http://bugs.exim.org/show_bug.cgi?id=1503
http://jira.mongodb.org/browse/SERVER-17252

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.