-----BEGIN PGP SIGNED MESSAGE-----

===========================================================================
              AUSCERT External Security Bulletin Redistribution
                             
                      ESB-2000.382 -- RHSA-2000:122-04
                     race condition exists in diskcheck
                               5 December 2000

===========================================================================

	AusCERT Security Bulletin Summary
	---------------------------------

Product:                diskcheck
Vendor:                 Red Hat
Operating System:       Red Hat Linux
                        Linux
Impact:                 Overwrite Arbitrary Files
Access Required:        Existing Account

- --------------------------BEGIN INCLUDED TEXT--------------------

- ---------------------------------------------------------------------
                   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
- ---------------------------------------------------------------------

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.

- --------------------------END INCLUDED TEXT--------------------

This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content.  The decision to use any or all of this information is
the responsibility of each user or organisation, and should be done so in
accordance with site policies and procedures.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the original authors to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

	http://www.auscert.org.au/Information/advisories.html

If you believe that your system has been compromised, contact AusCERT or
your representative in FIRST (Forum of Incident Response and Security
Teams).

Internet Email: auscert@auscert.org.au
Facsimile:	(07) 3365 7031
Telephone:	(07) 3365 4417 (International: +61 7 3365 4417)
		AusCERT personnel answer during Queensland business hours
		which are GMT+10:00 (AEST).
		On call after hours for emergencies.


-----BEGIN PGP SIGNATURE-----
Version: 2.6.3i
Charset: noconv
Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key

iQCVAwUBOlSNZCh9+71yA2DNAQHo1AP7BWwvaBqXFpwBFuaeZAWYJ4ggp4RoMvYu
Y1kLwD9iX6aT0bpMDR4qTp/gAR8iw6asUhFmyaDv24azGzxlUuB9CH6OxkkAvgr9
gpZK9A1QuHXpJueefkMj8KvKRIyya9JQazP+r9R864K50/xx1SfmdIaACrKJfVZV
Q7NPnCN39Gc=
=w8ib
-----END PGP SIGNATURE-----