A vulnerability related to recursive method calls handling was found in php. the Tnumber of nested calls a method could perform to itself doesn't seem to be limited, causing an infinite recursion that would result in invalid memory read access due to stack exhaustion. Upstream bug: https://bugs.php.net/bug.php?id=69793 Upstream fix: http://git.php.net/?p=php-src.git;a=commit;h=4d2278143a08b7522de9471d0f014d7357c28fea
This bug is triggered by a specially crafted code, or by deserialization of untrusted input. Both of these are insecure, with worse impact that just crash this bug causes. There is no plan to backport this fix to PHP packages in Red Hat products.
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