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TrueCrypt "setuid" Local Denial of Service and Privilege Escalation
Secunia Advisory: SA24643
Release Date: 2007-03-28
Last Update: 2007-05-21
Popularity: 6,486 views

Critical:
Not critical
Impact: Privilege escalation
DoS
Where: Local system
Solution Status: Vendor Patch

Software:TrueCrypt 4.x

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CVE reference:CVE-2007-1738


Description:
Tim Rees has discovered a security issue in TrueCrypt, which can be exploited by malicious, local users to cause a DoS (Denial of Service) or gain escalated privileges.

The security issue is caused if the "truecrypt" binary is installed setuid root. This can be exploited to cause a DoS or gain escalated privileges by e.g. mounting a malicious TrueCrypt disk into /usr/bin or another user's home directory.

Successful exploitation requires that TrueCrypt is installed setuid root (not default setting).

The security issue is confirmed in version 4.3. Other versions may also be affected.

Solution:
Update to version 4.3a.

Provided and/or discovered by:
Tim Rees

Changelog:
2007-04-02: Added CVE reference.
2007-05-21: Updated "Solution" section.


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