CVE-2015-7358

moderate-risk
Published 2017-10-03

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.

Do I need to act?

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0.85% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
!
1 public exploit available
38403
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (3)

Veracrypt

Affected Vendors

Idrix Ciphershed Truecrypt

References (12)

Third Party Advisory http://packetstormsecurity.com/files/133878/Truecrypt-7-Derived-Code-Windows-Dri...
Mailing List http://www.openwall.com/lists/oss-security/2015/09/22/7
Issue Tracking http://www.openwall.com/lists/oss-security/2015/09/24/3
Third Party Advisory https://code.google.com/p/google-security-research/issues/detail?id=538
Release Notes https://veracrypt.codeplex.com/wikipage?title=Release%20Notes
Third Party Advisory https://www.exploit-db.com/exploits/38403/
Third Party Advisory http://packetstormsecurity.com/files/133878/Truecrypt-7-Derived-Code-Windows-Dri...
Mailing List http://www.openwall.com/lists/oss-security/2015/09/22/7
Issue Tracking http://www.openwall.com/lists/oss-security/2015/09/24/3
Third Party Advisory https://code.google.com/p/google-security-research/issues/detail?id=538
Release Notes https://veracrypt.codeplex.com/wikipage?title=Release%20Notes
Third Party Advisory https://www.exploit-db.com/exploits/38403/
43
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 10/34 · Low
Exposure 9/34 · Low