From bugzilla@REDHAT.COM Fri Nov 10 12:04:34 2000 From: bugzilla@REDHAT.COM To: BUGTRAQ@SECURITYFOCUS.COM Date: Thu, 9 Nov 2000 15:49:00 -0500 Subject: [BUGTRAQ] [RHSA-2000:075-07] Updated usermode packages available [The following text is in the "iso-8859-1" character set] [Your display is set for the "US-ASCII" character set] [Some characters may be displayed incorrectly] --------------------------------------------------------------------- Red Hat, Inc. Security Advisory Synopsis: Updated usermode packages available Advisory ID: RHSA-2000:075-07 Issue date: 2000-10-05 Updated on: 2000-11-08 Product: Red Hat Linux Keywords: usermode format-string Cross references: N/A --------------------------------------------------------------------- 1. Topic: Updated usermode packages are now available for Red Hat Linux 6.x and 7. 2. Relevant releases/architectures: Red Hat Linux 6.0 - i386, alpha, sparc Red Hat Linux 6.1 - i386, alpha, sparc Red Hat Linux 6.2 - i386, alpha, sparc Red Hat Linux 6.2EE - i386, alpha, sparc Red Hat Linux 7.0 - i386 Red Hat Linux 7.0J - i386 3. Problem description: The usermode package contains a binary (/usr/bin/userhelper), which is used to control access to programs which are to be executed as root. Because programs invoked by userhelper are not actually running setuid-root, security measures built into recent versions of glibc are not active. If one of these programs supports internationalized text messages, a malicious user can use the LANG or LC_ALL environment variables (which are inherited by userhelper and, in turn, any programs it runs) to create a format-string exploit in these programs. These updated packages also fix a problem due to an incorrect path specification in the /usr/bin/shutdown wrapper script and close a potential security vulnerability in the userhelper binary. 4. Solution: For each RPM for your particular architecture, run: rpm -Fvh [filename] where filename is the name of the RPM. 5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info): 18046 - Another security hole in usermode/glibc 19034 - shutdown wrapper references non-existent /usr/sbin/shutdown 20160 - shutdown script contains call to /usr/sbin/shutdown, which doesn't exist 20027 - /usr/sbin/userhelper dies in segmentation fault 6. RPMs required: Red Hat Linux 6.0: sparc: ftp://updates.redhat.com/6.0/sparc/usermode-1.37-1.6.sparc.rpm ftp://updates.redhat.com/6.0/sparc/SysVinit-2.78-5.sparc.rpm i386: ftp://updates.redhat.com/6.0/i386/usermode-1.37-1.6.i386.rpm ftp://updates.redhat.com/6.0/i386/SysVinit-2.78-5.i386.rpm alpha: ftp://updates.redhat.com/6.0/alpha/usermode-1.37-1.6.alpha.rpm ftp://updates.redhat.com/6.0/alpha/SysVinit-2.78-5.alpha.rpm sources: ftp://updates.redhat.com/6.0/SRPMS/usermode-1.37-1.6.src.rpm ftp://updates.redhat.com/6.0/SRPMS/SysVinit-2.78-5.src.rpm Red Hat Linux 6.1: alpha: ftp://updates.redhat.com/6.1/alpha/usermode-1.37-1.6.alpha.rpm ftp://updates.redhat.com/6.1/alpha/SysVinit-2.78-5.alpha.rpm sparc: ftp://updates.redhat.com/6.1/sparc/usermode-1.37-1.6.sparc.rpm ftp://updates.redhat.com/6.1/sparc/SysVinit-2.78-5.sparc.rpm i386: ftp://updates.redhat.com/6.1/i386/usermode-1.37-1.6.i386.rpm ftp://updates.redhat.com/6.1/i386/SysVinit-2.78-5.i386.rpm sources: ftp://updates.redhat.com/6.1/SRPMS/usermode-1.37-1.6.src.rpm ftp://updates.redhat.com/6.1/SRPMS/SysVinit-2.78-5.src.rpm Red Hat Linux 6.2: alpha: ftp://updates.redhat.com/6.2/alpha/usermode-1.37-1.6.alpha.rpm ftp://updates.redhat.com/6.2/alpha/SysVinit-2.78-5.alpha.rpm sparc: ftp://updates.redhat.com/6.2/sparc/usermode-1.37-1.6.sparc.rpm ftp://updates.redhat.com/6.2/sparc/SysVinit-2.78-5.sparc.rpm i386: ftp://updates.redhat.com/6.2/i386/usermode-1.37-1.6.i386.rpm ftp://updates.redhat.com/6.2/i386/SysVinit-2.78-5.i386.rpm sources: ftp://updates.redhat.com/6.2/SRPMS/usermode-1.37-1.6.src.rpm ftp://updates.redhat.com/6.2/SRPMS/SysVinit-2.78-5.src.rpm Red Hat Linux 7.0: i386: ftp://updates.redhat.com/7.0/i386/usermode-1.37-2.i386.rpm sources: ftp://updates.redhat.com/7.0/SRPMS/usermode-1.37-2.src.rpm 7. Verification: MD5 sum Package Name -------------------------------------------------------------------------- 3310677ae7403c683e7947cd86b19344 6.0/SRPMS/SysVinit-2.78-5.src.rpm e299c4b17b7eafdf66acf1fb21491d9b 6.0/SRPMS/usermode-1.37-1.6.src.rpm 546bf7949c5be73b9f28b1819bfbd7c6 6.0/alpha/SysVinit-2.78-5.alpha.rpm 978af994a09fcbc4bf1cb2fa2723bfe7 6.0/alpha/usermode-1.37-1.6.alpha.rpm ca5b97a1abb47b64d71ef69ab96fcb8a 6.0/i386/SysVinit-2.78-5.i386.rpm e8fe2db6f95348a93a373673b1c87443 6.0/i386/usermode-1.37-1.6.i386.rpm 4dfeacb8db12af4b2666f2792e1027c1 6.0/sparc/SysVinit-2.78-5.sparc.rpm ba94a59a3a8195346735f202f28af3f8 6.0/sparc/usermode-1.37-1.6.sparc.rpm 3310677ae7403c683e7947cd86b19344 6.1/SRPMS/SysVinit-2.78-5.src.rpm e299c4b17b7eafdf66acf1fb21491d9b 6.1/SRPMS/usermode-1.37-1.6.src.rpm 546bf7949c5be73b9f28b1819bfbd7c6 6.1/alpha/SysVinit-2.78-5.alpha.rpm 978af994a09fcbc4bf1cb2fa2723bfe7 6.1/alpha/usermode-1.37-1.6.alpha.rpm ca5b97a1abb47b64d71ef69ab96fcb8a 6.1/i386/SysVinit-2.78-5.i386.rpm e8fe2db6f95348a93a373673b1c87443 6.1/i386/usermode-1.37-1.6.i386.rpm 4dfeacb8db12af4b2666f2792e1027c1 6.1/sparc/SysVinit-2.78-5.sparc.rpm ba94a59a3a8195346735f202f28af3f8 6.1/sparc/usermode-1.37-1.6.sparc.rpm 3310677ae7403c683e7947cd86b19344 6.2/SRPMS/SysVinit-2.78-5.src.rpm e299c4b17b7eafdf66acf1fb21491d9b 6.2/SRPMS/usermode-1.37-1.6.src.rpm 546bf7949c5be73b9f28b1819bfbd7c6 6.2/alpha/SysVinit-2.78-5.alpha.rpm 978af994a09fcbc4bf1cb2fa2723bfe7 6.2/alpha/usermode-1.37-1.6.alpha.rpm ca5b97a1abb47b64d71ef69ab96fcb8a 6.2/i386/SysVinit-2.78-5.i386.rpm e8fe2db6f95348a93a373673b1c87443 6.2/i386/usermode-1.37-1.6.i386.rpm 4dfeacb8db12af4b2666f2792e1027c1 6.2/sparc/SysVinit-2.78-5.sparc.rpm ba94a59a3a8195346735f202f28af3f8 6.2/sparc/usermode-1.37-1.6.sparc.rpm ede9b759a01552a261c67ebf0238794a 7.0/SRPMS/usermode-1.37-2.src.rpm c32888b6f362b04f8a3805d4465c042a 7.0/i386/usermode-1.37-2.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/corp/contact.html You can verify each package with the following command: rpm --checksig If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: rpm --checksig --nogpg 8. References: N/A Copyright(c) 2000 Red Hat, Inc.