search menu icon-carat-right cmu-wordmark

CERT Coordination Center

Beck IPC@Chip TelnetD vulnerable to account lockout via idle telnet connection

Vulnerability Note VU#756019

Original Release Date: 2001-09-17 | Last Revised: 2003-04-14


There is a vulnerability in the Beck IPC@CHIP that allows an attacker to create a denial-of-service condition.


The Beck IPC@CHIP is a single chip embedded webserver. This device contains a telnet server that is configured by default to not have a login timeout. Additionally, this telnet server only pemits one user to connect at any given time. Because there is no timeout set on the telnet server login and only one user can login at a time, a malicious user can connect to the service and remain idle at a login prompt. By sitting idle at the prompt, the attacker is able to keep any other legitimate user or the administrator from logging into the device via telnet.


Unless the administrator changes the default settings on the Beck IPC@CHIP, an attacker can prevent the system administrator or any other valid user from logging into the device via telnet.


Change the default settings on the telnet server to allow for a login timeout.

Vendor Information


Beck GmbH Affected

Notified:  May 21, 2001 Updated: September 17, 2001



Vendor Statement

Please see

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

Group Score Vector



This vulnerability was discovered by Sentry Research Labs.

This document was written by Ian A. Finlay.

Other Information

CVE IDs: CVE-2001-1340
Severity Metric: 2.81
Date Public: 2001-05-24
Date First Published: 2001-09-17
Date Last Updated: 2003-04-14 17:52 UTC
Document Revision: 34

Sponsored by CISA.