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CelFrame Office Suite 2008 <= Insecure DLL Hijacking Vulnerability
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1. OVERVIEW

The CelFrame Office Suite application is vulnerable to Insecure DLL Hijacking Vulnerability. Similar terms that describe this vulnerability have been come up with Remote Binary Planting, and Insecure DLL Loading/Injection/Hijacking/Preloading.


2. PRODUCT DESCRIPTION

Celframe Office is a Microsoft and Adobe Photoshop compatible professional level office & graphic design productivity software. CO 2006 Home boasts of five applications covering every productivity category. The core programs are not only fully Microsoft & Adobe compatible, but also with rival programs for ease of use and advanced features. Celframe Write (MS Word '.doc')--word processor with tables, frames and grammar checker. Celframe Spreadsheet (MS Excel '.xls')--with conditional format styles, entry validation messages and data filtering. Celframe Studio (Adobe Photoshop '.psd')- Photo editing & vector drawing software for Photoshop users. Celframe Photo Album - Image organizer for digital photos. Celframe Draw creating letterheads, logos and insert pictures.


3. VULNERABILITY DESCRIPTION

The CelFrame Office Suite applications pass an insufficiently qualified path in loading their external libraries    
 when a user opens its associated file with extensions. 
 
 Celframe Office Write	
	- affected dll: java_msci.dll, msci_java.dll
	- affected extention: doc

 Celframe Office Spreadsheet 
	- affected dll: java_msci.dll, msci_java.dll
	- affected extention: xls
	
 Celframe Office Publisher 
	- affected exe: gswin32c.exe
	- affected dll: wintab32.dll
	- affected extention: sla
	
 Celframe Office Draw
	- affected dll: java_msci.dll, msci_java.dll
	- affected extention: odg
	
 Celframe Office Photo Alblum
	- affected dll: wintab32.dll
	- affected extention: plx


4. VERSIONS AFFECTED

2008 and probably lower versions


5. PROOF-OF-CONCEPT/EXPLOIT

http://core.yehg.net/lab/pr0js/advisories/dll_hijacking/celframe-office-2008/poc/movie/celfrme_office_2008-binary-planting-vuln.mp4

Tested Platform: Windows XP Service Pack 3 (Fresh Windows)


6. IMPACT

Attackers can trigger a successful exploit against a victim user in a number of ways such as placing a malicious external 
library file made as hidden attribute and a seemingly interesting file in network shares, usb drives, file sharing networks, 
social networks, ..etc	


7. SOLUTION

Fixed version from the vendor has not been released yet.
However, it is suggested that the following workarounds be deployed by users to protect increasing mass exploitation of this 
vulnerability class:
- Disable loading of libraries from WebDAV and remote network shares
- Disable the WebClient service 
Please see workaround solution links in References section.


8. VENDOR

Celframe
http://www.celframe.com/


9. CREDIT

This vulnerability was discovered by Aung Khant, http://yehg.net, YGN Ethical Hacker Group, Myanmar. 


10. DISCLOSURE TIME-LINE

09-11-2010: notified vendor
09-13-2010: vulnerability disclosed


11. REFERENCES

Original Advisory URL: http://core.yehg.net/lab/pr0js/advisories/dll_hijacking/[celframe_office]_2008_insecure_dll_hijacking
Workaround Solution: http://support.microsoft.com/kb/2264107
Workaround Solution: https://www.microsoft.com/technet/security/advisory/2269637.mspx#EGF
Developer Solution: http://msdn.microsoft.com/en-us/library/ff919712%28v=VS.85%29.aspx
Unofficial DLL Hijacking List: http://www.corelan.be:8800/index.php/2010/08/25/dll-hijacking-kb-2269637-the-unofficial-list/
Testing for DLL Hijacking: http://core.yehg.net/lab/pr0js/view.php/when_testing_for_dll_hijacking.txt

#yehg [09-13-2010]