Path traversal in PHP

1) Path traversal

EUVDB-ID: #VU16139

Risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2014-9767

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in ZipArchive::extractTo function in ext/zip/php_zip.c and in and ext/zip/ext_zip.cpp in HHVM. A remote attacker can pass a specially crafted zip archive to the affected application and create arbitrary empty directories on the system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

PHP: 5.4.0 - 5.6.12

CPE2.3

• cpe:2.3:a:php_group:php:5.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:php_group:php:5.4.1:*:*:*:*:*:*:*
• cpe:2.3:a:php_group:php:5.4.2:*:*:*:*:*:*:*
• cpe:2.3:a:php_group:php:5.4.3:*:*:*:*:*:*:*
• cpe:2.3:a:php_group:php:5.4.4:*:*:*:*:*:*:*
• cpe:2.3:a:php_group:php:5.4.5:*:*:*:*:*:*:*
• cpe:2.3:a:php_group:php:5.4.6:*:*:*:*:*:*:*
• cpe:2.3:a:php_group:php:5.4.7:*:*:*:*:*:*:*
• cpe:2.3:a:php_group:php:5.4.8:*:*:*:*:*:*:*
• cpe:2.3:a:php_group:php:5.4.9:*:*:*:*:*:*:*

External links

https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00052.html
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00056.html
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00057.html
https://lists.opensuse.org/opensuse-security-announce/2016-04/msg00058.html
https://php.net/ChangeLog-5.php
https://www.openwall.com/lists/oss-security/2016/03/16/20
https://www.securityfocus.com/bid/76652
https://www.securitytracker.com/id/1035311
https://www.ubuntu.com/usn/USN-2952-1
https://www.ubuntu.com/usn/USN-2952-2
https://bugs.php.net/bug.php?id=67996
https://bugs.php.net/bug.php?id=70350
https://github.com/facebook/hhvm/commit/65c95a01541dd2fbc9c978ac53bed235b5376686

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.