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Security update for telnet


(Last modified: 28FEB2005)

solutions Security update for telnet SuSE Linux Maintenance Web (b1e64e238134069ad4b3519f91102157)

Applies to

Package: telnet
Product(s): SUSE CORE 9 for x86
SUSE CORE 9 for Itanium Processor Family
SUSE CORE 9 for IBM S/390 31bit
SUSE CORE 9 for IBM zSeries 64bit
SUSE CORE 9 for AMD64 and Intel EM64T
SuSE Linux Desktop 1.0
SUSE LINUX Retail Solution 8
SuSE Linux School Server for i386
SuSE Linux Standard Server 8
SuSE Linux Enterprise Server 8 for x86
SuSE Linux Enterprise Server 8 for IPF
SuSE Linux Enterprise Server 8 for IBM iSeries and IBM pSeries
SuSE Linux Enterprise Server 8 for IBM S/390 and IBM zSeries
SuSE Linux Enterprise Server 8 for IBM zSeries
SuSE Linux Enterprise Server 8 for AMD64
Novell Linux Desktop 9 for x86
Novell Linux Desktop 9 for x86_64
SuSE Linux Openexchange Server 4
Patch: patch-9903
Release: 20050228
Obsoletes: none


Everyone still using the telnet client should update.



Problem description

CAN-2005-0469: This update fixes several vulnerabilities in the telnet client.
A buffer overflow in the LINEMODE suboption command SLC can be exploited by a
malicious server to execute arbitrary code on the client site with the
privileges of the user running telnet.
CAN-2005-0468: Another buffer overflow can be exploited remotely via a malicious server by sending environment variables to the client. The result of this bug is arbitrary code execution too.
Note that this bug can also be exploited by clicking on a URL link that uses telnet:// as protocol and points to a server controlled by an attacker.


Please install the updates provided at the location noted below.

Installation notes

This update is provided as an RPM package that can easily be installed onto a running system by using this command:
rpm -Fvh telnet.rpm

links to download packages

Download Source Packages

Download the source code of the patches for maintained products.


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