Red Hat Bugzilla – Bug 1374705
CVE-2016-7129 php: wddx_deserialize allows illegal memory access
Last modified: 2016-11-15 13:36:22 EST
The following flaw was found in PHP: While deserializing an invalid dateTime value, wddx_deserialize will parse it in a wrong way and then assign the supplied value as the address of the created variable. This allows illegal memory access. We noted that the problem seems to happen because of the included \r inside the value of the dateTime. Upstream bug: https://bugs.php.net/bug.php?id=72749 Upstream patch: https://github.com/php/php-src/commit/426aeb2808955ee3d3f52e0cfb102834cdb836a5?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