PHP 3-5 ZendEngine ECalloc Integer Overflow Vulnerability

ID SSV:82307
Type seebug
Reporter Root
Modified 2014-07-01T00:00:00


No description provided by source.


PHP is prone to an integer-overflow vulnerability because the application fails to do proper bounds checking on user-supplied data.

An attacker can exploit this vulnerability to execute arbitrary code in the context of the affected application. Failed exploit attempts will likely cause denial-of-service conditions.



in function zend_hash_init() int overflow ( ecalloc() )-> heap overflow
here segfault in zend_hash_find() but it's possible to fake the bucket and
exploit a zend_hash_del_index_or_key
i tried a memory dump , just fake the bucked with the pointer of the
$GLOBALS's bucket but segfault before in memory_shutdown...