Red Hat Bugzilla – Bug 1374711
CVE-2016-7132 php: wddx_deserialize null dereference in php_wddx_pop_element
Last modified: 2016-11-15 13:37:16 EST
The following flaw was found in PHP: If we add an element to boolean leaf of XML struct, a null pointer dereference will happen when the element is popped. A remote attacker could use this flaw to crash a PHP application. Upstream bug: https://bugs.php.net/bug.php?id=72799 Upstream patch: https://github.com/php/php-src/commit/a14fdb9746262549bbbb96abb87338bacd147e1b?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