#VU3613 Use-after-free error in PHP - CVE-2016-5773 

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Main Vulnerability Database Vulnerabilities #VU3613

#VU3613 Use-after-free error in PHP - CVE-2016-5773

Published: September 20, 2016 / Updated: June 17, 2021


Vulnerability identifier: #VU3613
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
CVE-ID: CVE-2016-5773
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: Public exploit is available
Vulnerable software:
PHP
Software vendor:
PHP Group

Description

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.

Remediation

Update to version 5.6.23.

External links