Type confusion in PHP - CVE-2015-4147
Published: December 21, 2016 / Updated: November 27, 2018
Vulnerability identifier: #VU2556
CSH Severity: High
CVSS v4.0: 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:U/U:Amber
CVE-ID: CVE-2015-4147
CWE-ID: CWE-843
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: PHP Group
Affected software:
PHP
PHP
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to type confusion in the SoapClient::__call method in ext/soap/soap.c in PHP before 5.4.39, 5.5.x before 5.5.23, and 5.6.x before 5.6.7 does not verify that __default_headers is an array. A remote attacker can trigger memory corruption and execute arbitrary code by providing crafted serialized data with an unexpected data type.
Successful exploitation of the vulnerability may result in system compromise.
The weakness exists due to type confusion in the SoapClient::__call method in ext/soap/soap.c in PHP before 5.4.39, 5.5.x before 5.5.23, and 5.6.x before 5.6.7 does not verify that __default_headers is an array. A remote attacker can trigger memory corruption and execute arbitrary code by providing crafted serialized data with an unexpected data type.
Successful exploitation of the vulnerability may result in system compromise.
How to mitigate CVE-2015-4147
Install update from vendor's website.