#VU12903 Out-of-bounds read in PHP - CVE-2016-9935

Vulnerability identifier: #VU12903

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-9935

CWE-ID: CWE-125

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 cause DoS condition on the target system.

The weakness exists in the php_wddx_push_element function in ext/wddx/wddx.c due to out-of-bounds read. A remote attacker can submit an empty boolean element in a wddxPacket XML document and cause the service to crash.

Mitigation
Update to version 5.6.29 or 7.0.14.

Vulnerable software versions

PHP: 5.6.0 - 5.6.28, 7.0.0 - 7.0.13

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External links
https://www.php.net/ChangeLog-5.php
https://www.php.net/ChangeLog-7.php

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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.