[CLA-2002:534] Conectiva Linux Security Announcement - krb5
Date: Fri, 25 Oct 2002 20:39:22 -0200
From: secure@conectiva.com.br
To: conectiva-updates@papaleguas.conectiva.com.br, lwn@lwn.net,
Subject: [CLA-2002:534] Conectiva Linux Security Announcement - krb5
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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : krb5
SUMMARY : Buffer overflow vulnerability in the Kerberos 4 administration daemon
DATE : 2002-10-25 20:38:00
ID : CLA-2002:534
RELEVANT
RELEASES : 8
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DESCRIPTION
The "krb5" packages are MIT's[1] implementation of the Kerberos 5
authentication protocol.
There is a buffer overflow vulnerability[2][3] in the Kerberos 4
remote administration service (kadmind4) that could be used by a
remote attacker to execute arbitrary commands on the server with root
privileges.
The daemon which implements this service, kadmind4, is included in
our krb5-server package, but not used by default. The package
defaults to using the kadmind daemon, which is not vulnerable to this
problem. Only administrators who explicitly run kadmind4 will be at
risk.
The authors released an advisory[2] with a patch which fixes the
vulnerability. This patch has been applied to the updated packages
below.
SOLUTION
All Kerberos users should upgrade their packages immediately.
IMPORTANT: if the kadmind4 daemon is in use, it needs to be manually
restarted after upgrading the packages.
REFERENCES
1.http://web.mit.edu/Kerberos/www/index.html
2.http://web.mit.edu/Kerberos/www/advisories/MITKRB5-SA-2002-002-kadm4.txt
3.http://www.cert.org/advisories/CA-2002-29.html
4.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1235
DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/8/SRPMS/krb5-1.2.3-3U8_3cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-1.2.3-3U8_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-apps-clients-1.2.3-3U8_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-apps-servers-1.2.3-3U8_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-client-1.2.3-3U8_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-devel-1.2.3-3U8_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-devel-static-1.2.3-3U8_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-doc-1.2.3-3U8_3cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-server-1.2.3-3U8_3cl.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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