Description
The IsDriveLetterAvailable method in Driver/Ntdriver.c in TrueCrypt 7.0, VeraCrypt before 1.15, and CipherShed, when running on Windows, does not properly validate drive letter symbolic links, which allows local users to mount an encrypted volume over an existing drive letter and gain privileges via an entry in the /GLOBAL?? directory.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- https://veracrypt.codeplex.com/wikipage?title=Release%20Notes ↗
- https://www.exploit-db.com/exploits/38403/ ↗
- http://www.openwall.com/lists/oss-security/2015/09/24/3 ↗
- http://packetstormsecurity.com/files/133878/Truecrypt-7-Derived-Code-Windows-Drive-Letter-Symbolic-Link-Creation-Privilege-Escalation.html ↗
- http://www.openwall.com/lists/oss-security/2015/09/22/7 ↗
- https://code.google.com/p/google-security-research/issues/detail?id=538 ↗