-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - -------------------------------------------------------------------------- CONECTIVA LINUX SECURITY ANNOUNCEMENT - -------------------------------------------------------------------------- PACKAGE : XFree86 SUMMARY : Local vulnerabilities DATE : 2002-10-03 14:17:00 ID : CLA-2002:529 RELEVANT RELEASES : 8 - ------------------------------------------------------------------------- DESCRIPTION XFree86 is a freely redistributable open-source implementation of the X Window System, which is a client/server interface between display hardware and the desktop environment. Xlib is one of the main libraries of XFree86 (libX11.so.6). This update adresses two vulnerabilities in XFree86: - XLib i18n vulnerability XFree86-4.2.0 added a functionality to the Xlib which allows it to load modules from paths controled by the user during the startup of programs linked against it. The vulnerability[1] exists because Xlib does not check if the program being started is SUID, thus allowing arbitrary code to be run with the other users' privileges By exploiting this vulnerability a malicious user can get aditional privileges on the system. In the worst case, he/she can run arbitrary code as root if there are SUID root programs linked against Xlib. Althought we were not able to sucessfuly run any exploit, there are some SUID root programs linked against Xlib in Conectiva Linux 8 which are potentially vulnerable. Conectiva Linux 6.0 (XFree86-4.0.1) and Conectiva Linux 7.0 (XFree86-4.0.3) are not vulnerable. - MIT-SHM extension vulnerability Roberto Zunino discovered a vulnerability in the MIT-SHM extension of XFree86 prior to versions 4.2.1. The vulnerability allows a local user who can run XFree86 to gain read/write access to any shared memory segment in the system. Although the use of shared memory segments to store trusted data is not a common practice, by exploiting this vulnerability the attacker potentially can get and/or change sensitive information. This vulnerability also affects Conectiva Linux version 6.0 and 7.0, and a new update for these versions will be available in the next days. SOLUTION All XFree86 users should upgrade. Users of Conectiva Linux 6.0 and 7.0 are still vulnerable to the MIT-SHM extension vulnerability and should wait for a new update in a few days. REFERENCES: 1. http://www.xfree86.org/security/ DIRECT DOWNLOAD LINKS TO THE UPDATED PACKAGES ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-apm-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-ark-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-ati-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-ati-dri-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-bench-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-chips-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-cirrus-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-common-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-config-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-cyrix-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-devel-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-devel-static-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-doc-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-doc-html-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-dps-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-fbdev-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-GL-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-GL-devel-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-glide-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-glint-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-i128-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-i740-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-i810-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-i810-dri-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-libs-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-libs-common-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-libs-Xaw-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-libs-Xaw6-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-manpages-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-mga-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-mga-dri-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-minimal-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-misc-locales-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-modules-afb-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-modules-cfb-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-modules-codeconv-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-modules-extended-input-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-modules-fb-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-modules-fb-lowcolor-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-modules-fb-multi-depths-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-modules-freetype-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-modules-xaa-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-modules-xtt-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-neomagic-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-nv-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-progs-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-proxy-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-rendition-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-s3-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-s3virge-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-savage-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-Server-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-Server-common-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-siliconmotion-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-sis-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-sis-dri-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-tdfx-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-tdfx-dri-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-tga-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-trident-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-tseng-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-twm-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-vesa-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-vga-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-vmware-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-xdm-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-xfs-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-xkb-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-Xnest-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-Xprt-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/XFree86-Xvfb-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/xterm-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/freetype2-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/freetype2-devel-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/freetype2-devel-static-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/RPMS/rstart-4.2.0-21U80_2cl.i386.rpm ftp://atualizacoes.conectiva.com.br/8/SRPMS/XFree86-4.2.0-21U80_2cl.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-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 iD8DBQE9nHvh42jd0JmAcZARAkgeAJ4x2Lk/UOLpeefX/j4nWzQKRgeoFACgxRd4 ZkknrE6cWMUUbylJ8aE2sPA= =jN+H -----END PGP SIGNATURE-----
