Remote code execution in PHP

Published: 2016-06-15 00:00:00 | Updated: 2017-03-20 15:27:30
Severity High
Patch available YES
Number of vulnerabilities 1
CVSSv2 7.4 (AV:N/AC:L/Au:N/C:C/I:C/A:C/E:U/RL:OF/RC:C)
CVE ID CVE-2016-5773
Exploitation vector Network
Public exploit Not available
Vulnerable software PHP
Vulnerable software versions PHP 5.6.0
PHP 5.6.1
PHP 5.6.2
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Vendor URL PHP Group
Advisory type Public

Security Advisory

1) Use-after-free error


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

The vulnerability exists due to use-after-free in GC algorithm and unserialize. A remote attacker can create a specially crafted zval object and exploit the PHP process by taking over the EIP/RIP.

Successful exploitation of this vulnerability results in complete control over the vulnerable web application and execute arbitrary PHP code on the target system.


Update to version 5.6.23.

External links

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