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] _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/