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    CVE-2015-7358

    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.

    Published:Oct 2, 2017
    Last Modified:Apr 20, 2025
    EPS:Oct 2, 2017
    EPSS Score:0.00993
    CVSS Score:7.8

    Affected Products

    Vendor
    Ciphershed
    Product
    Ciphershed
    Vendor
    Idrix
    Product
    Veracrypt
    Vendor
    Microsoft
    Product
    Windows
    Vendor
    Truecrypt
    Product
    Truecrypt

    Exploits

    https://www.exploit-db.com/exploits/38403

    Common Weakness Enumeration

    No CWE recorded yet

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    References

    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=Release%20Notes
    https://www.exploit-db.com/exploits/38403/
    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=Release%20Notes
    https://www.exploit-db.com/exploits/38403/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High