Executive Summary

Title DevonIT weak authentication and buffer overflow in /usr/bin/tm-console-bin
Name VU#278785 First vendor Publication 2010-08-24
Vendor VU-CERT Last vendor Modification 2010-08-24
Severity (Vendor) N/A Revision M

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
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Vulnerability Note VU#278785

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


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.

I. Description

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.

II. Impact

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.

III. Solution

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

VendorStatusDate NotifiedDate Updated
Devon IT Inc.Affected2009-09-172010-08-10



Thanks to Kevin Finisterre for reporting this vulnerability.

This document was written by Jared Allar.

Other Information

Date Public:2010-08-24
Date First Published:2010-08-24
Date Last Updated:2010-08-24
CERT Advisory: 
US-CERT Technical Alerts: 
Document Revision:14

Original Source

Url : http://www.kb.cert.org/vuls/id/278785

CWE : Common Weakness Enumeration

% Id Name
50 % CWE-255 Credentials Management
50 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

Application 1

Open Source Vulnerability Database (OSVDB)

Id Description
67715 DevonIT Thin-client Management Tool Shared Authentication Secret Cleartext Tr...

67714 DevonIT Thin-client Management Tool tm-console-bin Unspecified Overflow