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[ GLSA 200503-36 ] netkit-telnetd: Buffer overflow
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GLSA
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Joined: 13 Jun 2003
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Location: Barcelona, Spain

PostPosted: Thu Mar 31, 2005 11:51 am    Post subject: [ GLSA 200503-36 ] netkit-telnetd: Buffer overflow Reply with quote

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


References

CAN-2005-0469
iDEFENSE Advisory 03-28-05


Last edited by GLSA on Wed Feb 12, 2014 4:19 am; edited 3 times in total
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