Input validation error in PHP - CVE-2015-6831
Published: January 19, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU40518
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2015-6831
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
Multiple use-after-free vulnerabilities in SPL in PHP before 5.4.44, 5.5.x before 5.5.28, and 5.6.x before 5.6.12 allow remote attackers to execute arbitrary code via vectors involving (1) ArrayObject, (2) SplObjectStorage, and (3) SplDoublyLinkedList, which are mishandled during unserialization. <a href="http://cwe.mitre.org/data/definitions/416.html">CWE-416: Use After Free</a>
Affected software
PHP
Amazon Linux AMI
Amazon Linux AMI
How to mitigate CVE-2015-6831
Install update from vendor's website.
External References
- http://www.debian.org/security/2015/dsa-3344
- http://www.openwall.com/lists/oss-security/2015/08/19/3
- http://www.php.net/ChangeLog-5.php
- http://www.securityfocus.com/bid/76737
- https://bugs.php.net/bug.php?id=70155
- https://bugs.php.net/bug.php?id=70166
- https://bugs.php.net/bug.php?id=70168
- https://bugs.php.net/bug.php?id=70169
- https://security.gentoo.org/glsa/201606-10