73049 2002-08-07 20:58 /105 rader/ <secure@conectiva.com.br> Importerad: 2002-08-07 20:58 av Brevbäraren Extern mottagare: conectiva-updates@papaleguas.conectiva.com.br Extern mottagare: lwn@lwn.net Extern mottagare: bugtraq@securityfocus.com Extern mottagare: security-alerts@linuxsecurity.com Mottagare: Bugtraq (import) <1010> Ärende: [CLA-2002:515] Conectiva Linux Security Announcement - krb5 ------------------------------------------------------------ -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : krb5 SUMMARY : Integer overflow in Kerberos' remote administration service DATE : 2002-08-07 15:29:00 ID : CLA-2002:515 RELEVANT RELEASES : 8 - ------------------------------------------------------------------------- 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 - ------------------------------------------------------------------------- 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 - ------------------------------------------------------------------------- All our advisories and generic update instructions can be viewed at http://distro.conectiva.com.br/atualizacoes/?idioma=en - ------------------------------------------------------------------------- subscribe: conectiva-updates-subscribe@papaleguas.conectiva.com.br unsubscribe: conectiva-updates-unsubscribe@papaleguas.conectiva.com.br -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE9UWdZ42jd0JmAcZARAmTHAKDSwsC2gldeXUr59xLfhZiF1F6dXQCfXa2f XV5veZmNyg2ItCpsLcRPSnI= =nnf6 -----END PGP SIGNATURE----- (73049) / <secure@conectiva.com.br>/------(Ombruten)