CVE-2015-7358

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

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

El método IsDriveLetterAvailable en Driver/Ntdriver.c en TrueCrypt 7.0, Veracrypt en versiones anteriores a la 1.15 y CipherShed, cuando se ejecuta en Windows, no valida correctamente los enlaces simbólicos de las letras de las unidades de disco, lo que permite a los usuarios locales montar un volumen cifrado en una letra de unidad existente y obtener privilegios mediante una entrada en el directorio /GLOBAL??.

The Windows driver used by projects derived from Truecrypt 7 (verified in Veracrypt and CipherShed) are vulnerable to a local elevation of privilege attack by abusing the drive letter symbolic link creation facilities to remap the main system drive. With the system drive remapped it's trivial to get a new process running under the local system account.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-09-24 CVE Reserved
2015-10-05 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
2024-08-06 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-264: Permissions, Privileges, and Access Controls

CAPEC

References (6)

URL	Tag	Source
http://packetstormsecurity.com/files/133878/Truecrypt-7-Derived-Code-Windows-Drive-Letter-Symbolic-Link-Creation-Privilege-Escalation.html	Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/09/22/7	Mailing List
http://www.openwall.com/lists/oss-security/2015/09/24/3	Issue Tracking
https://code.google.com/p/google-security-research/issues/detail?id=538	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/38403	2024-08-06

URL	Date	SRC

URL	Date	SRC
https://veracrypt.codeplex.com/wikipage?title=Release%20Notes	2021-06-28

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Ciphershed Search vendor "Ciphershed"	Ciphershed Search vendor "Ciphershed" for product "Ciphershed"	<= 0.7.5.0 Search vendor "Ciphershed" for product "Ciphershed" and version " <= 0.7.5.0"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	*	-	Safe
Idrix Search vendor "Idrix"	Veracrypt Search vendor "Idrix" for product "Veracrypt"	<= 1.14 Search vendor "Idrix" for product "Veracrypt" and version " <= 1.14"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	*	-	Safe
Truecrypt Search vendor "Truecrypt"	Truecrypt Search vendor "Truecrypt" for product "Truecrypt"	7.0 Search vendor "Truecrypt" for product "Truecrypt" and version "7.0"	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Search vendor "Microsoft" for product "Windows"	*	-	Safe