-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : util-linux SUMMARY : Local root vulnerability in chfn DATE : 2002-09-12 15:54:00 ID : CLA-2002:523 RELEVANT RELEASES : 6.0, 7.0, 8 - ------------------------------------------------------------------------- DESCRIPTION The util-linux package contains a large variety of system utilities that are necessary for a Linux system to function. Among many features, it includes the chfn utility, a suid root tool used to change user account information. Michal Zalewski found a race condition vulnerability[1] in the way chfn locks files when changing /etc/passwd. In order to sucessfully exploit this vulnerability, some administrator interaction is needed and there are some prerequisites to fulfill. Full details can be found in the Bindview advisory[2]. Having what appears to be a stale /etc/ptmptmp file could be a sign that the vulnerability is being exploited. In that case, the administrator should investigate current users and processes before attemtping to remove this file. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2002-0638 to this issue[3]. Please note that the fixed packages were available in our ftp servers since September 2nd, 2002. SOLUTION All users should upgrade. REFERENCES: 1.http://www.kb.cert.org/vuls/id/405955 2.http://razor.bindview.com/publish/advisories/adv_chfn.html 3.http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0638 4.http://distro.conectiva.com.br/bugzilla/show_bug.cgi?id=6401 DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/6.0/RPMS/util-linux-2.10o-2U60_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/6.0/SRPMS/util-linux-2.10o-2U60_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/7.0/RPMS/util-linux-2.10s-4U70_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/7.0/SRPMS/util-linux-2.10s-4U70_1cl.src.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/util-linux-2.11n-4U80_1cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/SRPMS/util-linux-2.11n-4U80_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 - ------------------------------------------------------------------------- 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 v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE9gOMQ42jd0JmAcZARAiZAAKDeuetP/1qrijZNKxIylEAmvs0fgQCeJBDt XiBiyhwzIMX0QlcjbOrsaro= =jo1F -----END PGP SIGNATURE-----
This archive was generated by hypermail 2b30 : Thu Sep 12 2002 - 12:07:17 PDT