The FTP Commander 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
FTP Commander is an FTP client for Windows. The program is developed by InternetSoft Corporation. Features include multiple connections, SSH, SSL, scheduler and backup tool, proxy and firewall support, chmod features, and localization for over 20 languages
3. VULNERABILITY DESCRIPTION
The FTP Commander application passes an insufficiently qualified path in
loading an external library when a user launch the application
Affected Library List
---------------------
# dwmapi.dll
4. VERSIONS AFFECTED
8.02 and prior
Tested Platform: Windows 7 x64 (Fresh Windows)
6. IMPACT
This occurs when an application fails to resolve a DLL because the DLL does not exist in the specified path or search directories. If this happens, a malicious Dll with the same name can be placed in the specified path directory leading to remote code execution.
7. SOLUTION
For application developers:
Require set paths for DLLs in applications
For system administrators:
Disable write permissions to relative application folders
Utilize least privilege access to prevent users (and applications) from having too much access to the system
For both groups:
Microsoft has a great article explaining the DLL-related registry keys and how they can be used to protect applications -
http://blogs.technet.com/b/srd/archive/2010/08/23/more-information-about-dll-preloading-remote-attack-vector.aspx
8. VENDOR
InternetSoft Corporation
www.internet-soft.com/ftpcomm.htm
9. CREDIT
This vulnerability was discovered by Ye Yint Min Thu htut, http://pentest.space
10. DISCLOSURE TIME-LINE
07-26-2017: vulnerability discovered
07-26-2017: notified vendor
08-29-2017: vulnerability disclosed
11. REFERENCES
https://support.microsoft.com/en-us/help/2389418/secure-loading-of-libraries-to-prevent-dll-preloading-attacks
https://cwe.mitre.org/data/definitions/427.html
