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                   Red Hat, Inc. Security Advisory

Synopsis:          race condition exists in diskcheck
Advisory ID:       RHSA-2000:122-04
Issue date:        2000-12-01
Updated on:        2000-12-04
Product:           Red Hat Powertools
Keywords:          N/A
Cross references:  N/A
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1. Topic:

A race vulnerability exists in the diskcheck package.

2. Relevant releases/architectures:

Red Hat Powertools 6.0 - noarch
Red Hat Powertools 6.1 - noarch
Red Hat Powertools 6.2 - noarch

3. Problem description:

A race vulnerability exists where a user can replace the tempfile used by
diskcheck with symlinks to other files on the system, making it possible to
corrupt those files.

The update fixes this problem. All users of diskcheck should update to the
version listed below.

NOTE: The diskcheck package in Powertools 7 is not vulnerable.

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):

11724 - tempfile has easily guessed name and follows symlinks


6. RPMs required:

Red Hat Powertools 6.0, 6.1, and 6.2:

noarch:
ftp://updates.redhat.com/powertools/6.2/noarch/diskcheck-3.1.1-10.6x.noarch.rpm

sources:
ftp://updates.redhat.com/powertools/6.2/SRPMS/diskcheck-3.1.1-10.6x.src.rpm

7. Verification:

MD5 sum                           Package Name
--------------------------------------------------------------------------
21097512fb90148010485215d148b30b  6.2/SRPMS/diskcheck-3.1.1-10.6x.src.rpm
ab3afbea96341fce252c72e304039362  6.2/noarch/diskcheck-3.1.1-10.6x.noarch.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  <filename>

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 <filename>

8. References:

N/A


Copyright(c) 2000 Red Hat, Inc.