Secunia

Secunia Research has discovered a security issue in MDaemon, which can be exploited by malicious, local users to gain escalated privileges.

The problem is caused due to the application by default being installed in the "MDaemon" folder in the system root with insecure permissions (granting members of the "Users" group permissions to create files and directories). This can be exploited by e.g. placing a malicious RASAPI32.DLL or MPRAPI.DLL library in the "MDaemon\APP" directory.

Successful exploitation allows execution of arbitrary code with SYSTEM privileges.

The security issue is confirmed in versions 9.0.5, 9.0.6, 9.51, and 9.53. Other versions may also be affected.

NOTE: This is a general problem for the majority of Windows applications when installed outside the "Program Files" folder due to the way libraries are located.

Solution
Set secure permissions on the directory or install in the "Program Files" folder (according to the vendor, this should not have an impact on the functionality of the application).
Further details available in Customer Area

Provided and/or discovered by
Secunia Research

Changelog
Further details available in Customer Area

Original Advisory
Secunia Research:
http://secunia.com/secunia_research/2006-67/

Deep Links
Links available in Customer Area