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Conectiva Linux Advisory: krb5

Aug 07, 2002, 21:29 (0 Talkback[s])

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CONECTIVA LINUX SECURITY ANNOUNCEMENT 
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PACKAGE   : krb5
SUMMARY   : Integer overflow in Kerberos' remote administration service
DATE      : 2002-08-07 15:29:00
ID        : CLA-2002:515
RELEVANT
RELEASES  : 8

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DESCRIPTION
 The "krb5" packages are MIT's implementation of the Kerberos 5
 authentication protocol.
 
 There is a vulnerability[1][2][3] present in the remote
 administration service, "kadmind", that could potentially be used by
 an attacker to execute arbitrary commands with administrator
 privileges.
 
 The vulnerability lies in the RPC library, derived from SunRPC, used
 by this service. An unchecked multiplication could lead to an integer
 overflow which would result in memory being incorrectly allocated and
 potential buffer overflows.


SOLUTION
 It is recommended that all kerberos 5 remote administration users
 upgrade their packages. The kadmind service will be automatically
 restarted after the upgrade if it was already running.
 
 If an upgrade is not possible at this time, administrators should
 shut down the "kadmind" service or control access to it via packet
 filters or other means. To shut down the kadmind service, execute the
 following command as root:
 
 /sbin/service kadmind stop
 
 Please note the remote administration service "kadmind" is not
 enabled by default.
 
 
 REFERENCES
 1.http://web.mit.edu/Kerberos/www/advisories/MITKRB5-SA-2002-001-xdr.txt
 2.http://www.cert.org/advisories/CA-2002-25.html
 3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0391


DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES
ftp://atualizacoes.conectiva.com.br/8/SRPMS/krb5-1.2.3-3U8_2cl.src.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-1.2.3-3U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-apps-clients-1.2.3-3U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-apps-servers-1.2.3-3U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-client-1.2.3-3U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-devel-1.2.3-3U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-devel-static-1.2.3-3U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-doc-1.2.3-3U8_2cl.i386.rpm
ftp://atualizacoes.conectiva.com.br/8/RPMS/krb5-server-1.2.3-3U8_2cl.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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