#VU30441 Out-of-bounds read in PCRE - CVE-2015-2325

Vulnerability identifier: #VU30441

Vulnerability risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2015-2325

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

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

Vendor: PCRE

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary error in the compile_branch function. A remote attacker can create a regular expression with a group containing a forward reference repeated a large number of times within a repeated outer group that has a zero minimum quantifier, trick the victim into opening it, trigger out-of-bounds read error and read contents of memory on the system.

Mitigation
Update to version 8.37.

Vulnerable software versions

PCRE: 8.00 - 8.36

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External links
https://lists.opensuse.org/opensuse-updates/2015-05/msg00014.html
https://bugs.exim.org/show_bug.cgi?id=1591
https://fortiguard.com/zeroday/FG-VD-15-015
https://www.pcre.org/original/changelog.txt

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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.