Conectiva Information for VU#745371

Multiple vendor telnet daemons vulnerable to buffer overflow via crafted protocol options

Status

Affected

Vendor Statement

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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE   : telnet
SUMMARY   : Remote root vulnerability
DATE      : 2001-08-24 15:43:00
ID        : CLA-2001:413
RELEVANT
RELEASES  : 4.0, 4.0es, 4.1, 4.2, 5.0, prg graficos, ecommerce, 5.1, 6.0, 7.0

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DESCRIPTION
The TESO crew reported on Bugtraq a vulnerability affecting the
telnet server which can be used by remote attackers to obtain root
privileges. Initially it was thought that the netkit-telnet package,
used by most linux distributions, was not vulnerable starting with
version 0.14, but zen-parse showed later on that those versions,
including the 0.17 one, are also vulnerable.


SOLUTION
We recommend that all users currently using telnet start using
openssh instead or some other form of encrypted communication.
Users who cannot switch to openssh now should upgrade the telnet
package immediately. Please note that no restart is necessary after
the upgrade, since telnet is started on demand by inetd.


 REFERENCES:
1.
http://www.securityfocus.com/bid/3064


DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/4.0/SRPMS/telnet-0.17-1U40_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/4.0/i386/telnet-0.17-1U40_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/4.0es/SRPMS/telnet-0.17-1U40_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/4.0es/i386/telnet-0.17-1U40_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/4.1/SRPMS/telnet-0.17-1U41_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/4.1/i386/telnet-0.17-1U41_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/4.2/SRPMS/telnet-0.17-1U42_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/4.2/i386/telnet-0.17-1U42_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/telnet-0.17-1U50_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/telnet-0.17-1U50_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/i386/telnet-server-0.17-1U50_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/telnet-0.17-1U51_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/telnet-server-0.17-1U51_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/telnet-0.17-1U51_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/telnet-0.17-2U60_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/telnet-server-0.17-2U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/telnet-0.17-2U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/telnet-0.17-2U70_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/telnet-0.17-2U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/telnet-server-0.17-2U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/SRPMS/telnet-0.17-1U50_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/telnet-0.17-1U50_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/ecommerce/i386/telnet-server-0.17-1U50_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/SRPMS/telnet-0.17-1U50_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/telnet-0.17-1U50_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/ferramentas/graficas/i386/telnet-server-0.17-1U50_1cl.i386.rpm


ADDITIONAL INSTRUCTIONS
Users of Conectiva Linux version 6.0 or higher may use apt to perform
upgrades of RPM packages:
- add the following line to /etc/apt/sources.list if it is not there yet
  (you may also use linuxconf to do this):

 rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates

(replace 6.0 with the correct version number if you are not running CL6.0)

 - run:                 apt-get update
- after that, execute: apt-get upgrade

 Detailed instructions reagarding the use of apt and upgrade examples
can be found at
http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en


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All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at
http://distro.conectiva.com.br/seguranca/politica/?idioma=en
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All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

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subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br
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Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Vendor References

None

Addendum

The CERT/CC has no additional comments at this time.

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