Vulnerability identifier: #VU16112

Vulnerability risk: Low

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2015-3411

CWE-ID: CWE-264

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 bypass security restrictions on the target system.

The weakness exists due to PHP before 5.4.40, 5.5.x before 5.5.24, and 5.6.x before 5.6.8 does not ensure that pathnames lack %00 sequences. A remote attacker can read or write to arbitrary files via crafted input to an application that calls (1) a DOMDocument load method, (2) the xmlwriter_open_uri function, (3) the finfo_file function, or (4) the hash_hmac_file function, as demonstrated by a filename.xml attack that bypasses an intended configuration in which client users may read only .xml files.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PHP: 5.6.0 - 5.6.7, 5.5.0 - 5.5.23, 5.4.0 - 5.4.39

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External links
http://bugs.php.net/bug.php?id=69353

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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.