VDB-107328 · CVE-2015-7358 · EDB-ID 38403

Truecrypt/VeraCrypt Symbolic Links Driver/Ntdriver.c IsDriveLetterAvailable access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Truecrypt and VeraCrypt and classified as problematic. Affected by this issue is the function IsDriveLetterAvailable of the file Driver/Ntdriver.c of the component Symbolic Links Handler. The manipulation results in access control. This vulnerability was named CVE-2015-7358. The attack needs to be approached locally. In addition, an exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Truecrypt and VeraCrypt (the affected version is unknown). Affected is the function IsDriveLetterAvailable of the file Driver/Ntdriver.c of the component Symbolic Links Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 09/22/2015. The weakness was presented 10/03/2017 as EDB-ID 38403 as not defined exploit (Exploit-DB). The advisory is shared for download at exploit-db.com. This vulnerability is traded as CVE-2015-7358 since 09/24/2015. The attack needs to be approached locally. A authentication is needed for exploitation. Technical details and a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1068.

After immediately, there has been an exploit disclosed. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 741 days. During that time the estimated underground price was around $0-$5k.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (38403). See VDB-107329 for similar entry. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

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Price Prediction: 🔍
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Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
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Timelineinfo

09/22/2015 🔍
09/24/2015 +2 days 🔍
10/02/2017 +739 days 🔍
10/03/2017 +1 days 🔍
10/03/2017 +0 days 🔍
10/03/2017 +0 days 🔍
10/03/2017 +0 days 🔍
07/14/2025 +2841 days 🔍