CVE-2015-7358: The IsDriveLetterAvailable method in Driver/Ntdriver.c in TrueCrypt 7.0, VeraCrypt before 1.15, and CipherShed

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HIGH 7.8UPGRADEUPGRADEDOWNGRADE

CVE-2015-7358 is a high-severity flaw (CVSS 7.8) affecting ciphershed, veracrypt, truecrypt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-264
Published	2017-10-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ciphershed · idrix · truecrypt

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-10-03 01:29 UTCPublished CVE record published
2026-06-17 00:32 UTCUpdated Record last modified

ciphershed ciphershed UPGRADE

Affected: <= 0.7.5.0

Fixed in: newer than 0.7.5.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ciphershed || rpm -q ciphershed || ciphershed --version

2. UPGRADE to newer than 0.7.5.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ciphershed

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ciphershed

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

idrix veracrypt UPGRADE

Affected: <= 1.14

Fixed in: newer than 1.14

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy veracrypt || rpm -q veracrypt || veracrypt --version

2. UPGRADE to newer than 1.14 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade veracrypt

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade veracrypt

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

truecrypt truecrypt DOWNGRADE

Affected: 7.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 7.0

1. Check installed version

apt-cache policy truecrypt || rpm -q truecrypt || truecrypt --version

2. No fixed release: DOWNGRADE to a release before 7.0 (Debian / Ubuntu)

apt-cache madison truecrypt sudo apt install truecrypt=<VERSION_BEFORE_7.0> sudo apt-mark hold truecrypt

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list truecrypt sudo dnf downgrade truecrypt-<VERSION_BEFORE_7.0> sudo dnf versionlock add truecrypt

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: TrueCrypt 7 / VeraCrypt 1.13 - Drive Letter Symbolic Link Creation Privilege Escalation

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-7358?

ciphershed: upgrade to newer than 0.7.5.0; veracrypt: upgrade to newer than 1.14; truecrypt: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2015-7358 being exploited?

CVE-2015-7358 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-7358 affect?

CVE-2015-7358 affects ciphershed, veracrypt, truecrypt. Severity is high (CVSS 7.8). 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

How urgent is CVE-2015-7358?

Priority 49/100. High severity; Public exploit reference

Software pages

Windows vulnerabilities

Related CVEs

CVE-2015-7359 HIGH 7.8 UPGRADE UPGRADE The (1) IsVolumeAccessibleByCurrentUser and (2) MountDevice methods in Ntdriver.c in TrueCrypt 7.0, VeraCrypt

References

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