Heap-based buffer overflow in PHP

1) Heap-based buffer overflow

EUVDB-ID: #VU16137

Risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2016-7134

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:php_group:php:7.0.9:*:*:*:*:*:*:*

External links

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

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.