CVE-2015-7358 Information

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.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

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 http://www.openwall.com/lists/oss-security/2015/09/24/3 https://code.google.com/p/google-security-research/issues/detail?id=538 https://veracrypt.codeplex.com/wikipage?title=Release20Notes https://www.exploit-db.com/exploits/38403/

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8