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Re: PHP 5 ecalloc memory manager unserialize() array int overflow ia 32 bits poc
From: Josh Bressers <josh () bress net>
Date: Tue, 17 Oct 2006 20:28:20 -0400
<? 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...
This looks to be CVE-2006-4812, which was discovered by Stefan Esser. He published his advisory last week: http://www.hardened-php.net/advisory_092006.133.html -- JB _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- PHP 5 ecalloc memory manager unserialize() array int overflow ia 32 bits poc Slythers Bro (Oct 17)
- Re: PHP 5 ecalloc memory manager unserialize() array int overflow ia 32 bits poc Josh Bressers (Oct 17)
- Re: PHP 5 ecalloc memory manager unserialize() array int overflow ia 32 bits poc Slythers Bro (Oct 18)
- Re: PHP 5 ecalloc memory manager unserialize() array int overflow ia 32 bits poc Josh Bressers (Oct 17)