Full Disclosure mailing list archives
Re: PHP 5 ecalloc memory manager unserialize() array int overflow ia 32 bits poc
From: "Slythers Bro" <slythers () gmail com>
Date: Wed, 18 Oct 2006 14:06:30 +0200
"*ia 32 bits poc" poc = Proof Of Concept * On 10/18/06, Josh Bressers <josh () bress net> wrote:
> > <? > > 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/
_______________________________________________ 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)