An invalid read occurs when wddx decodes empty boolean element, leading to arbitrary memory read or crash. Upstream bug: https://bugs.php.net/bug.php?id=73631 Upstream patch: https://github.com/php/php-src/commit/66fd44209d5ffcb9b3d1bc1b9fd8e35b485040c0 CVE assignment: http://seclists.org/oss-sec/2016/q4/658
Created php tracking bugs for this issue: Affects: fedora-all [bug 1404737]
This issue happens when untrusted input is unserialized. Doing so is documented as being unsafe: http://php.net/manual/en/function.wddx-deserialize.php#refsect1-function.wddx-deserialize-notes Warning Do not pass untrusted user input to wddx_deserialize(). 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.
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 7.3 EUS Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUS Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUS Via RHSA-2018:1296 https://access.redhat.com/errata/RHSA-2018:1296