The Foxit Reader 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
Foxit Reader is a multilingual freemium PDF tool that can create, view, edit, digitally sign, and print PDF files. Foxit Reader is developed by Fremont, California-based Foxit Software Incorporated. Early versions of Foxit Reader were notable for startup performance and small file size.
3. VULNERABILITY DESCRIPTION
The Foxit Reader application passes an insufficiently qualified path in
loading an external library when a user launch the application
Affected Library List
---------------------
[*] RICHED20.DLL
[*] CRYPTSP.dll
[*] USERENV.dll
[*] profapi.dll
[*] RpcRtRemote.dll
[*] apphelp.dll
[*] ntmarta.dll
[*] DEVRTL.dll
[*] credssp.dll
[*] DNSAPI.dll
[*] rasadhlp.dll
[*] schannel.DLL
[*] RASAPI32.dll
[*] rtutils.dll
[*] sensapi.dll
[*] dhcpcsvc.DLL
[*] secur32.dll
[*] ncrypt.dll
[*] bcrypt.dll
[*] GPAPI.dll
[*] cryptnet.dll
[*] dhcpcsvc6.DLL
[*] Cabinet.dll
[*] WindowsCodecs.dll
4. VERSIONS AFFECTED
8.3.1.21155 and prior
5. PROOF-OF-CONCEPT/EXPLOIT
TBA
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
Update the latest version of Foxit PDF reader
https://www.foxitsoftware.com/support/security-bulletins.php
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
Foxit
https://www.foxitsoftware.com/pdf-reader/
9. CREDIT
This vulnerability was discovered by Ye Yint Min Thu htut, http://pentest.space
10. DISCLOSURE TIME-LINE
07-30-2017: vulnerability discovered
07-30-2017: notified vendor
04-18-2018: vendor fixed and patch released (https://www.foxitsoftware.com/support/security-bulletins.php)
04-20-2018: 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
