Input validation error in PHP - CVE-2015-6834
Published: May 16, 2016 / Updated: June 17, 2021
Vulnerability identifier: #VU40285
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-2015-6834
CWE-ID: CWE-20
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 non-authenticated attacker to execute arbitrary code.
Multiple use-after-free vulnerabilities in PHP before 5.4.45, 5.5.x before 5.5.29, and 5.6.x before 5.6.13 allow remote attackers to execute arbitrary code via vectors related to (1) the Serializable interface, (2) the SplObjectStorage class, and (3) the SplDoublyLinkedList class, which are mishandled during unserialization. <a href="http://cwe.mitre.org/data/definitions/502.html">CWE-502: Deserialization of Untrusted Data</a>
How to mitigate CVE-2015-6834
Install update from vendor's website.
Sources
- http://php.net/ChangeLog-5.php
- http://www.debian.org/security/2015/dsa-3358
- http://www.securityfocus.com/bid/76649
- http://www.securitytracker.com/id/1033548
- https://bugs.php.net/bug.php?id=70172
- https://bugs.php.net/bug.php?id=70365
- https://bugs.php.net/bug.php?id=70366
- https://security.gentoo.org/glsa/201606-10