Related Vulnerabilities: CVE-2016-7125  

It has been discovered that ext/session/session.c in PHP before 5.6.25 and 7.x before 7.0.10 skips invalid session names in a way that triggers incorrect parsing, which allows remote attackers to inject arbitrary-type session data by leveraging control of a session name, as demonstrated by object injection.

Severity High

Remote Yes

Type Access restriction bypass

Description

It has been discovered that ext/session/session.c in PHP before 5.6.25 and 7.x before 7.0.10 skips invalid session names in a way that triggers incorrect parsing, which allows remote attackers to inject arbitrary-type session data by leveraging control of a session name, as demonstrated by object injection.

AVG-152 php 7.0.9-1 7.0.10-1 High Fixed

https://bugs.php.net/bug.php?id=72681
https://github.com/php/php-src/commit/8763c6090d627d8bb0ee1d030c30e58f406be9ce?w=1
http://www.php.net/ChangeLog-7.php