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netkit-telnetd: Buffer overflow

Content:

1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200503-36 / netkit-telnetd
Release Date March 31, 2005
Latest Revision March 31, 2005: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
net-misc/netkit-telnetd < 0.17-r6 >= 0.17-r6 All supported architectures

Related bugreports: #87211

Synopsis

The netkit-telnetd telnet client is vulnerable to a buffer overflow, which could allow a malicious telnet server operator to execute arbitrary code.

2.  Impact Information

Background

netkit-telnetd provides standard Linux telnet client and server.

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.

3.  Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All netkit-telnetd users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/netkit-telnetd-0.17-r6"

4.  References



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Page updated March 31, 2005

Summary: This is a Gentoo Linux Security Advisory

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