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Home » Hacking News » Conectiva CLA-2003:627: ethereal multiple vulnerabilities

Conectiva CLA-2003:627: ethereal multiple vulnerabilities

by Nikola Strahija on April 24th, 2003 Several vulnerabilities have been found in Ethereal that could lead to buffer overflow attacks, format string attacks and denial of service attacks.


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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : ethereal
SUMMARY : Several vulnerabilities
DATE : 2003-04-16 16:03:00
ID : CLA-2003:627
RELEVANT
RELEASES : 6.0, 7.0, 8

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DESCRIPTION
Ethereal is a powerful network traffic analyzer with an intuitive
interface.

This update addresses the problems listed below. All these
vulnerabilities can be exploited by exposing the Ethereal program to
specially created network traffic, be it by sniffing a live network
or reading a capture file. The impact varies from a denial of service
to arbitrary command execution with the same privileges as the user
who is running Ethereal:

- buffer overflow in the ISIS protocol dissector[2];

- denial of service in the BGP protocol dissector[3], reported by
Silvio Cesare. Ethereal can enter an infinite loop when trying to
process a malformed message;

- several vulnerabilities[3] in the LMP, PPP and TDS protocol
dissectors;

- format string vulnerability[4] in the SOCKS protocol dissector,
reported by Georgi Guninski;

- buffer overflow vulnerability[4] in the NTLMSSP protocol dissector.


SOLUTION
It is recommended that all Ethereal users upgrade their packages. It
is also possible to bypass these specific vulnerabilities by
deactivating the vulnerable protocol dissectors. This can be done via
the "Edit->Protocols" menu.


REFERENCES
1. http://www.ethereal.com
2. http://www.ethereal.com/appnotes/enpa-sa-00006.html
3. http://www.ethereal.com/appnotes/enpa-sa-00007.html
4. http://www.ethereal.com/appnotes/enpa-sa-00008.html


UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/ethereal-0.9.11-1U60_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/ethereal-0.9.11-1U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/ethereal-0.9.11-1U70_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/ethereal-0.9.11-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/SRPMS/ethereal-0.9.11-1U80_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-0.9.11-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-common-0.9.11-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-gtk-0.9.11-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/ethereal-utils-0.9.11-1U80_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/tethereal-0.9.11-1U80_1cl.i386.rpm


ADDITIONAL INSTRUCTIONS
The apt tool can be used to perform RPM packages upgrades:

- 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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Copyright (c) 2003 Conectiva Inc.
http://www.conectiva.com

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subscribe: [email protected]
unsubscribe: [email protected]
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