Multiple vulnerabilities in PCRE PCRE

Published: 2020-01-14 | Updated: 2020-07-17

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2015-2325 CVE-2015-2326
CWE-ID	CWE-125
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	PCRE Universal components / Libraries / Libraries used by multiple products
Vendor	PCRE

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU30441

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-2325

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

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

External links

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

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.

2) Out-of-bounds read

EUVDB-ID: #VU30442

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-2326

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local non-authenticated attacker to perform a denial of service (DoS) attack.

The pcre_compile2 function in PCRE before 8.37 allows context-dependent attackers to compile incorrect code and cause a denial of service (out-of-bounds read) via regular expression with a group containing both a forward referencing subroutine call and a recursive back reference, as demonstrated by "((?+1)(1))/".