CVE-2015-7358
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
TrueCrypt 7 / VeraCrypt 1.13 - Drive Letter Symbolic Link Creation Privilege Escalation
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| ciphershed | ciphershed | {"endIncluding":"0.7.5.0"} | |
| idrix | veracrypt | {"endIncluding":"1.14"} | |
| truecrypt | truecrypt | 7.0 | |
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/
CWEs
CWE-264
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.