From debian-security-announce@LISTS.DEBIAN.ORG Sun Nov 19 03:56:18 2000 From: debian-security-announce@LISTS.DEBIAN.ORG To: BUGTRAQ@SECURITYFOCUS.COM Date: Fri, 17 Nov 2000 19:36:11 -0800 Reply-To: security@debian.org Subject: [BUGTRAQ] [SECURITY] New Debian cron packages released -----BEGIN PGP SIGNED MESSAGE----- - ---------------------------------------------------------------------------- Debian Security Advisory security@debian.org http://www.debian.org/security/ Daniel Jacobowitz November 17, 2000 - ---------------------------------------------------------------------------- Package: cron Vulnerability: local priviledge escalation Debian-specific: no Vulnerable: yes The version of Vixie Cron shipped with Debian GNU/Linux 2.2 is vulnerable to a local attack, discovered by Michal Zalewski. Several problems, including insecure permissions on temporary files and race conditions in their deletion, allowed attacks from a denial of service (preventing the editing of crontabs) to an escalation of priviledge (when another user edited their crontab). As a temporary fix, "chmod go-rx /var/spool/cron/crontabs" prevents the only available exploit; however, it does not address the problem. We recommend upgrading to version 3.0pl1-57.1, for Debian 2.2, or 3.0pl1-61, for Debian unstable. Also, in the new cron packages, it is no longer possible to specify special files (devices, named pipes, etc.) by name to crontab. Note that this is not so much a security fix as a sanity check. Debian GNU/Linux 2.1 alias slink - -------------------------------- Slink is no longer being supported by the Debian Security Team. We highly recommend an upgrade to the current stable release. Debian GNU/Linux 2.2 (stable) alias potato - ------------------------------------------ Fixes are currently available for the Alpha, ARM, Intel ia32, Motorola 680x0, PowerPC and Sun SPARC architectures, and will be included in 2.2r2. Source archives: http://security.debian.org/dists/potato/updates/main/source/cron_3.0pl1-57.1.diff.gz MD5 checksum: 4fac4be2841908090d1c877a65cf5ef9 http://security.debian.org/dists/potato/updates/main/source/cron_3.0pl1-57.1.dsc MD5 checksum: caed3f1556203618544eec823347df30 http://security.debian.org/dists/potato/updates/main/source/cron_3.0pl1.orig.tar.gz MD5 checksum: 4c64aece846f8483daf440f8e3dd210f Alpha architecture: http://security.debian.org/dists/potato/updates/main/binary-alpha/cron_3.0pl1-57.1_alpha.deb MD5 checksum: 3b146f5227182343d3b20cf8fce8a86c ARM architecture: http://security.debian.org/dists/potato/updates/main/binary-arm/cron_3.0pl1-57.1_arm.deb MD5 checksum: 559e80e83abf371a8d09759ee900daf5 Intel IA32 architecture: http://security.debian.org/dists/potato/updates/main/binary-arm/cron_3.0pl1-57.1_i386.deb MD5 checksum: 922bb72b07a05fb888771364697f52e1 Motorola 680x0 architecture: http://security.debian.org/dists/potato/updates/main/binary-m68k/cron_3.0pl1-57.1_m68k.deb MD5 checksum: 2e0d8152ec03a66bb88ba84215fe4de3 PowerPC architecture: http://security.debian.org/dists/potato/updates/main/binary-powerpc/cron_3.0pl1-57.1_powerpc.deb MD5 checksum: 16ad8c4a26436239e7a25260340be6d5 Sun Sparc architecture: http://security.debian.org/dists/potato/updates/main/binary-sparc/cron_3.0pl1-57.1_sparc.deb MD5 checksum: 2bd401a635eedc47e9f6dd1652f71e35 Debian GNU/Linux Unstable alias woody - ------------------------------------- This version of Debian is not yet released. Fixes will be made available for Alpha, ARM, Intel ia32, Motorola 680x0, PowerPC, and SPARC in the Debian archive over the next several days. - ---------------------------------------------------------------------------- For apt-get: deb http://security.debian.org/ stable/updates main Mailing list: debian-security-announce@lists.debian.org -----BEGIN PGP SIGNATURE----- Version: 2.6.3a Charset: noconv iQCVAwUBOhX30z5fjwqn/34JAQEBgAQAjE4b75YohlZB/bE7xvDtjZ5UchkpIUyC T3CwbwduLDOylVW7lqQz4Qb/wX4+k02z2keFaVU/neWqqj58/imX6Io5L2klt4uw +UmFpm5qKWqEg0A7dRVHEehjQzWa0DSo8gnwbBlpq6prJ+yKavkJ04v5J6/tcVtD hgF+R1UAwdk= =QTfW -----END PGP SIGNATURE----- -- To UNSUBSCRIBE, email to debian-security-announce-request@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org