Red Hat Security Advisory: Updated usermode packages availableOct 09, 2000, 20:23 (0 Talkback[s])
Date: Mon, 9 Oct 2000 14:23 -0400
Red Hat, Inc. Security Advisory Synopsis: Updated usermode packages available Advisory ID: RHSA-2000:075-05 Issue date: 2000-10-05 Updated on: 2000-10-09 Product: Red Hat Linux Keywords: usermode format-string Cross references: N/A
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
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.
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
6. RPMs required:
Red Hat Linux 6.0 and 6.1:
Red Hat Linux 6.2:
Red Hat Linux 7.0:
MD5 sum Package Name
3310677ae7403c683e7947cd86b19344 6.2/SRPMS/SysVinit-2.78-5.src.rpm c96aaae0df6782bb09bd65fb1d6dc69b 6.2/SRPMS/usermode-1.36-2.6.x.src.rpm 546bf7949c5be73b9f28b1819bfbd7c6 6.2/alpha/SysVinit-2.78-5.alpha.rpm afb4ad3a5715c0df6596a19db4d2b3c8 6.2/alpha/usermode-1.36-2.6.x.alpha.rpm ca5b97a1abb47b64d71ef69ab96fcb8a 6.2/i386/SysVinit-2.78-5.i386.rpm c2bac5d41ee077d2db48ed9462802ff0 6.2/i386/usermode-1.36-2.6.x.i386.rpm 4dfeacb8db12af4b2666f2792e1027c1 6.2/sparc/SysVinit-2.78-5.sparc.rpm 8567bb088fb7cab3e298d0df24f8c626 6.2/sparc/usermode-1.36-2.6.x.sparc.rpm 5ac6cca0a146d917e0ec3f6f1e046fa8 7.0/SRPMS/usermode-1.36-3.src.rpm 5d40e125fa0a31f05b8dac9321a1fa88 7.0/i386/usermode-1.36-3.i386.rpmThese packages are GPG signed by Red Hat, Inc. for security. Our key is available at:
You can verify each package with the following command:
If you only wish to verify that each package has not been
corrupted or tampered with, examine only the md5sum with the
Copyright(c) 2000 Red Hat, Inc.