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CERT Coordination Center

DevonIT weak authentication and buffer overflow in /usr/bin/tm-console-bin

Vulnerability Note VU#278785

Original Release Date: 2010-08-24 | Last Revised: 2010-08-24


The DevonIT management tool for thin clients uses a shared secret that is transmitted over the network in the clear. The /usr/bin/tm-console-bin application contains a buffer overflow, which may allow an attacker to execute arbitrary code.


The management tool transmits an unencrypted shared secret over the network to authenticate with clients. This traffic can then be used by an attacker to mimic a thin-manager server and control thin clients.


An attacker able to sniff traffic created by the management tool will be able to compromise the configuration of thin clients. An attacker may be able to exploit a buffer overflow in /usr/bin/tm-console-bin to execute arbitrary code.


We are currently unaware of a practical solution to this problem.

Restrict Access

Implement appropriate firewall rules so clients will only talk to a legitimate management server.

Vendor Information


Devon IT Inc. Affected

Notified:  September 17, 2009 Updated: August 10, 2010



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A



Thanks to Kevin Finisterre for reporting this vulnerability.

This document was written by Jared Allar.

Other Information

CVE IDs: None
Severity Metric: 0.03
Date Public: 2010-08-24
Date First Published: 2010-08-24
Date Last Updated: 2010-08-24 18:28 UTC
Document Revision: 14

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