[ GLSA 200503-36 ] netkit-telnetd: Buffer overflow

[GLSA]

Gentoo Linux Security Advisory

Title: netkit-telnetd: Buffer overflow (GLSA 200503-36)
Severity: normal
Exploitable: remote
Date: March 31, 2005
Bug(s): #87211
ID: 200503-36

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: net-misc/netkit-telnetd
Vulnerable: < 0.17-r6
Unaffected: >= 0.17-r6
Architectures: All supported architectures


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: