Date: Thu, 31 Mar 2005 13:28:58 +0200
From: Thierry Carrez <koon@gentoo.org.>
To: gentoo-announce@robin.gentoo.org
Subject: [ GLSA 200503-36 ] netkit-telnetd: Buffer overflow
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Gentoo Linux Security Advisory GLSA 200503-36
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http://security.gentoo.org/
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Severity: Normal
Title: netkit-telnetd: Buffer overflow
Date: March 31, 2005
Bugs: #87211
ID: 200503-36
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Synopsis
========
The netkit-telnetd telnet client is vulnerable to a buffer overflow,
which could allow a malicious telnet server operator to execute
arbitrary code.
Background
==========
netkit-telnetd provides standard Linux telnet client and server.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/netkit-telnetd < 0.17-r6 >= 0.17-r6
Description
===========
A buffer overflow has been identified in the slc_add_reply() function
of netkit-telnetd client, where a large number of SLC commands can
overflow a fixed size buffer.
Impact
======
Successful explotation would require a vulnerable user to connect to an
attacker-controlled host using telnet, potentially executing arbitrary
code with the permissions of the telnet user.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All netkit-telnetd users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/netkit-telnetd-0.17-r6"
References
==========
[ 1 ] CAN-2005-0469
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-0469
[ 2 ] iDEFENSE Advisory 03-28-05
http://www.idefense.com/application/poi/display?id=220&type=vulnerabilities
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200503-36.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2005 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/2.0
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