#VU33138 Uncontrolled Recursion in PCRE - CVE-2017-11164

Vulnerability identifier: #VU33138

Vulnerability risk: Medium

CVSSv4.0: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-11164

CWE-ID: CWE-674

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 perform a denial of service (DoS) attack.

The vulnerability exists due to uncontrolled recursion when processing regular expressions in the match function in pcre_exec.c. A remote attacker can perform a denial of service attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PCRE: 6.0 - 8.41

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External links
https://openwall.com/lists/oss-security/2017/07/11/3
https://www.securityfocus.com/bid/99575
https://vcs.pcre.org/pcre/code/trunk/pcre_exec.c?r1=1725&r2=1724&pathrev=1725

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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.