Red Hat Bugzilla – Bug 1374697
CVE-2016-7124 php: bypass __wakeup() in deserialization of an unexpected object
Last modified: 2016-11-15 13:32:24 EST
The following flaw was found in PHP: When an unexpected object is created, __wakeup() is not invoked during deserialization, which could allow an attacker to bypass __wakeup() and invoke __destruct() with crafted properties. Upstream bug: https://bugs.php.net/bug.php?id=72663 Upstream patch: https://github.com/php/php-src/commit/20ce2fe8e3c211a42fee05a461a5881be9a8790e?w=1
This issue happens when untrusted input is unserialized. Doing so it documented as being unsafe: http://php.net/manual/en/function.unserialize.php Do not pass untrusted user input to unserialize(). Unserialization can result in code being loaded and executed due to object instantiation and autoloading, and a malicious user may be able to exploit this. Use a safe, standard data interchange format such as JSON (via json_decode() and json_encode()) if you need to pass serialized data to the user.
This issue has been addressed in the following products: Red Hat Software Collections for Red Hat Enterprise Linux 6 Red Hat Software Collections for Red Hat Enterprise Linux 6.7 EUS Red Hat Software Collections for Red Hat Enterprise Linux 7 Red Hat Software Collections for Red Hat Enterprise Linux 7.2 EUS Red Hat Software Collections for Red Hat Enterprise Linux 7.3 EUS Via RHSA-2016:2750 https://rhn.redhat.com/errata/RHSA-2016-2750.html