Vulnerability identifier: #VU16137

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-7134

CWE-ID: CWE-122

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
PHP
Universal components / Libraries / Scripting languages

Vendor: PHP Group

Description

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

The vulnerability exists due to a boundary error in ext/curl/interface.c in PHP 7.x before 7.0.10. A remote attacker can use a long string that is mishandled in a curl_escape call. to trigger a heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PHP: 7.0.0 - 7.0.9

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External links
http://openwall.com/lists/oss-security/2016/09/02/9
http://www.php.net/ChangeLog-7.php
http://www.securityfocus.com/bid/92766
http://www.securitytracker.com/id/1036680
http://bugs.php.net/bug.php?id=72674
http://github.com/php/php-src/commit/72dbb7f416160f490c4e9987040989a10ad431c7?w=1
http://security.gentoo.org/glsa/201611-22

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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.