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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:

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



sources:

http://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  



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.