Type Confusion in PHP - CVE-2014-3515
Published: November 27, 2018 / Updated: June 17, 2021
Vulnerability identifier: #VU16092
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:P/U:Amber
CVE-ID: CVE-2014-3515
CWE-ID: CWE-843
Exploitation vector: Remote access
Exploit availability:
Public exploit is 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 vulnerability exists due to a type confusion error in (1) ArrayObject and (2) SPLObjectStorage. when the SPL component in PHP before 5.4.30 and 5.5.x before 5.5.14 incorrectly anticipates that certain data structures will have the array data type after unserialization. A remote attacker can trigger a type confusion error via a crafted string that triggers use of a Hashtable destructor and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2014-3515
Install update from vendor's website.