Public Vulnerability Reports

Motorola Timbuktu Pro Directory Traversal Vulnerability

08.27.07

BACKGROUND

Motorola Inc.'s Timbuktu Pro is a remote control software which allows remote access to a computer's desktop. It is available for Mac OS X and Windows systems and provides integration with Skype and SSH. More information is available from the product web site at the following URL.

http://netopia.com/software/products/tb2/

DESCRIPTION

Remote exploitation of a directory traversal vulnerability in Motorola Inc.'s Timbuktu Pro allows attackers to delete or create files with SYSTEM privileges.

When handling "Send" requests, Timbuktu does not properly check for directory traversal specifiers. Therefore, by including a sequence such as "../../../", an attacker is able to write outside of the intended location. Additionally, if the file already exists, the file is created with a new name. However, if the connection is broken before the transfer completes, Timbuktu will delete the originally specified file name instead of the new name.

ANALYSIS

Exploitation of this vulnerability could allow an attacker to gain control over the affected machine.

Since the attacker can delete and create arbitrary files with SYSTEM privileges, they are able to write to important system files such as libraries, or start up files that will result in arbitrary code execution.

It is important to note that the evaluation version used for testing enables "Send" privileges by default for "Guest" users.

DETECTION

iDefense confirmed the existence of this vulnerability in version 8.6.3.1367 of Motorola Inc.'s Timbuktu Pro for Windows. Other versions, including those for other operating systems are suspected to be vulnerable.

WORKAROUND

Removing the "Send" privilege from all Timbuktu Pro users will prevent the vulnerability from being exploited.

VENDOR RESPONSE

Motorola Inc. has addressed this vulnerability by releasing version 8.6.5 of Timbuktu Pro for Windows. For more information, consult the release notes at the following URL.

ftp://ftp-xo.netopia.com/evaluation/docs/timbuktu/win/865/relnotes/TB2Win865Evalrn.pdf

CVE INFORMATION

The Common Vulnerabilities and Exposures (CVE) project has assigned the name CVE-2007-4220 to this issue. This is a candidate for inclusion in the CVE list (http://cve.mitre.org/), which standardizes names for security problems.

DISCLOSURE TIMELINE

05/15/2007 Initial vendor response
05/16/2007 Initial vendor notification
08/27/2007 Coordinated public disclosure

CREDIT

This vulnerability was reported to iDefense by Titon of BastardLabs.

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LEGAL NOTICES

Copyright © 2007 Verisign, Inc.

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Disclaimer: The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information.