TITLE:
TrueCrypt External Command Execution Vulnerability

SECUNIA ADVISORY ID:
SA19903

VERIFY ADVISORY:
http://secunia.com/advisories/19903/

CRITICAL:
Less critical

IMPACT:
Privilege escalation

WHERE:
Local system

SOFTWARE:
TrueCrypt 4.x
http://secunia.com/product/7610/
TrueCrypt 3.x
http://secunia.com/product/8594/
TrueCrypt 2.x
http://secunia.com/product/8593/

DESCRIPTION:
Julien Tinnes has reported a vulnerability in Truecrypt, which
potentially can be exploited by malicious, local users to gain
escalated privileges.

The vulnerability is caused due to the unsafe use of the "execvp()"
function to execute external commands without sanitising the user's
current PATH settings. This can potentially be exploited by local
users to execute arbitrary commands with root privileges via
specially-crafted PATH settings.

Successful exploitation requires that the root user has specified
Truecrypt to be installed suid root during the installation process
(non-default).

The vulnerability has been reported in version 4.1. Prior versions
may also be affected.

SOLUTION:
Update to version 4.2.
http://www.truecrypt.org/downloads.php

PROVIDED AND/OR DISCOVERED BY:
Julien Tinnes

ORIGINAL ADVISORY:
http://lists.immunitysec.com/pipermail/dailydave/2006-April/003152.html

TrueCrypt:
http://www.truecrypt.org/history.php

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