-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : sendmail SUMMARY : Sendmail local root vulnerability DATE : 2001-08-23 11:30:00 ID : CLA-2001:412 RELEVANT RELEASES : 6.0, 7.0 - ------------------------------------------------------------------------- DESCRIPTION Sendmail is a largely used Mail Transfer Agent (MTA). Versions between (and including) 8.10.0 and 8.11.5 and some 8.12 beta versions have a local vulnerability that allows a local attacker to obtain root privileges. Cade Cairns from Security Focus discovered an input validation error in sendmail's debugging functionality. The function that handles the "-d" command line option uses a signed integer for that value and uses it as an index to an internal vector. This function does not check for negative values of this index, which allows a local attacker to cause a signed integer overflow by supplying large numbers to this parameter which can be used to write data outside that vector. Exploits for this vulnerability have already been published. SOLUTION Sendmail authors released version 8.11.6 to fix this problem. All sendmail users must upgrade immediately. Please note that this package already restarts the sendmail service if it's already running. Some users have reported that it might be necessary to rebuild the hash files in /etc/mail. For example, to rebuild the virtusertable file, execute: # cd /etc/mail # makemap hash virtusertable.db < virtusertable To rebuild the alias file, execute: # newaliases Starting with version 7.0 of Conectiva Linux, sendmail is no longer the default MTA of the distribution. REFERENCES: 1. http://www.sendmail.org/8.11.html 2. http://www.securityfocus.com/bid/3163 DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/sendmail-8.11.6-1U60_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-cf-8.11.6-1U60_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-8.11.6-1U60_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/RPMS/sendmail-doc-8.11.6-1U60_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/sendmail-8.11.6-1U70_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-cf-8.11.6-1U70_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-8.11.6-1U70_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/sendmail-doc-8.11.6-1U70_1cl.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-subscribeat_private unsubscribe: conectiva-updates-unsubscribeat_private -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.4 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE7hRPK42jd0JmAcZARAtT4AKCqBCPtZQQNdM8i8xRuN2w56h8TZACfRzQN glV9zIS3vTEzxjhn0g53E0o= =kDsH -----END PGP SIGNATURE-----
This archive was generated by hypermail 2b30 : Thu Aug 23 2001 - 07:47:24 PDT