From: secure@conectiva.com.br
To: conectiva-updates@papaleguas.conectiva.com.br, lwn@lwn.net,
bugtraq@securityfocus.com, security-alerts@linuxsecurity.com
Subject: [CLA-2002:474] Conectiva Linux Security Announcement - ethereal
Date: Thu, 25 Apr 2002 14:21:53 -0300
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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : ethereal
SUMMARY : Packet handling vulnerabilities
DATE : 2002-04-25 14:21:00
ID : CLA-2002:474
RELEVANT
RELEASES : 5.0, 5.1, 6.0, 7.0
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DESCRIPTION
Ethereal is a powerful network traffic analyzer with an intuitive
interface.
This update addresses two vulnerabilities stated in ethereal's home
page:
1.SNMP and LDAP string handling[1]
The PROTOS[2] test suite developed by the Oulu University Secure
Programming Group found some flaws in SNMP and LDAP protocols support
in ethereal. It may be possible to crash or execute arbitrary code in
the ethereal's context (ethereal is usually run by root) by injecting
crafted packets in the network or convincing someone to open a trace
file with such packets.
2.ASN.1 zero-length g_malloc[3]
Due to improper string parsing in ASN.1 routines, it is possible to
crash ethereal by inserting malformed packets in the wire or by
opening a trace file with such packets inside. SNMP, LDAP, COPS and
Kerberos parsers use the ASN routines to handle traffic.
There's also a third vulnerability reported in ethereal's home page
related to zlib's double free bug, which have been addressed already
by our zlib's advisory[4] some time ago.
SOLUTION
All ethereal users should do the upgrade.
REFERENCES:
1.http://www.ethereal.com/appnotes/enpa-sa-00001.html
2.http://www.ee.oulu.fi/research/ouspg/protos
3.http://www.ethereal.com/appnotes/enpa-sa-00003.html
4.http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000469&idioma=en
DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/5.0/i386/ethereal-0.9.3-1U50_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.0/SRPMS/ethereal-0.9.3-1U50_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/5.1/i386/ethereal-0.9.3-1U51_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/5.1/SRPMS/ethereal-0.9.3-1U51_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/6.0/RPMS/ethereal-0.9.3-1U60_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/ethereal-0.9.3-1U60_1cl.src.rpm
ftp://atualizacoes.conectiva.com.br/7.0/RPMS/ethereal-0.9.3-1U70_1cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/ethereal-0.9.3-1U70_1cl.src.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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