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Updated usermode packages are now available for Red Hat Linux 6.x and 7.
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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
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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.
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
6. RPMs required:
Red Hat Linux 6.0 and 6.1:
alpha:
ftp://updates.redhat.com/6.2/alpha/usermode-1.36-2.6.x.alpha.rpm
ftp://updates.redhat.com/6.2/alpha/SysVinit-2.78-5.alpha.rpm
sparc:
ftp://updates.redhat.com/6.2/sparc/usermode-1.36-2.6.x.sparc.rpm
ftp://updates.redhat.com/6.2/sparc/SysVinit-2.78-5.sparc.rpm
i386:
ftp://updates.redhat.com/6.2/i386/usermode-1.36-2.6.x.i386.rpm
ftp://updates.redhat.com/6.2/i386/SysVinit-2.78-5.i386.rpm
sources:
ftp://updates.redhat.com/6.2/SRPMS/usermode-1.36-2.6.x.src.rpm
ftp://updates.redhat.com/6.2/SRPMS/SysVinit-2.78-5.src.rpm
Red Hat Linux 6.2:
alpha:
ftp://updates.redhat.com/6.2/alpha/usermode-1.36-2.6.x.alpha.rpm
sparc:
ftp://updates.redhat.com/6.2/sparc/usermode-1.36-2.6.x.sparc.rpm
i386:
ftp://updates.redhat.com/6.2/i386/usermode-1.36-2.6.x.i386.rpm
sources:
ftp://updates.redhat.com/6.2/SRPMS/usermode-1.36-2.6.x.src.rpm
Red Hat Linux 7.0:
i386:
ftp://updates.redhat.com/7.0/i386/usermode-1.36-3.i386.rpm
sources:
ftp://updates.redhat.com/7.0/SRPMS/usermode-1.36-3.src.rpm
7. Verification:
MD5 sum Package Name
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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.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.
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