source: http://www.securityfocus.com/bid/1368/info

A number of vulnerabilities exist in HM Software S to Infinity, a security access control, desktop lockdown and transparent encryption application. Intended features include restriction of access to folders, files, floppy and CD-ROM drives, etc.

Early versions of S to Infinity allows the capability of any user to rename files and directories which opens up the possibility of a number of exploits:
- Renaming the S to Infinity directories in /Program Files and /Winnt/System will cause the program to cease to function.
- S to Infinity implicitly trusts any allowed program on the system. However, it can be configured to set *.exe to read-only. Therefore, a user can run any application by copying the executable program to something.txt and then renaming that copy to a trusted executable like notepad.exe.

Other security flaws present in S to Infinity:
- The drive invisibility mechanism can be bypassed by using Find, Internet Explorer, or Open and Save Dialogue boxes. Searching for the hidden drive letter and a known file in Find will allow access to files on the hidden drive. A user can open a hidden drive in Internet Explorer by clicking on a link that refers to the particular drive (eg. <a href="c:\">Link</a>).

- File and directory attributes can be modified using the DOS attrib command. StoI file-level protection does not rely on DOS file attributes, so this will not affect StoI settings. 

https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/bin-sploits/20022.exe