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Category:   Application (Generic)  >   Dump Vendors:   [Multiple Authors/Vendors]
(Red Hat Issues Fix) Dump Lets Local Users Deny Service By Locking a Certain File
SecurityTracker Alert ID:  1014621
SecurityTracker URL:  http://securitytracker.com/id/1014621
CVE Reference:   CVE-2002-1914   (Links to External Site)
Date:  Aug 3 2005
Impact:   Denial of service via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   In July 2002, a vulnerability was reported in Dump. A local user can cause denial of service conditions.

A local user can invoke the flock() function on certain files that are used for critical system applications to deny service to those applications.

The 'dump' application is affected. A local user can lock the '/etc/dumpdates' file to cause dump to fail to run.

The 'tip' application is also affected. A local user can lock the '/var/log/acculog' file to cause denial of service conditions.

Lumpy reported this vulnerability.

Impact:   A local user can cause the 'dump' application to fail.
Solution:   Red Hat has released a fix.

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/dump-0.4b25-1.72.2.src.rpm
a2105338ff2279973bcec74ea8dd96dd dump-0.4b25-1.72.2.src.rpm

i386:
b14ad2aef495fd52b2bfa8501147a86c dump-0.4b25-1.72.2.i386.rpm
1d658c6130d9b317456b56b6e21acd42 rmt-0.4b25-1.72.2.i386.rpm

ia64:
ace0b517d6b4d26fdfc40744368053cd dump-0.4b25-1.72.2.ia64.rpm
f6ed788f99e81abdde859cbb4dabe1fb rmt-0.4b25-1.72.2.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/dump-0.4b25-1.72.2.src.rpm
a2105338ff2279973bcec74ea8dd96dd dump-0.4b25-1.72.2.src.rpm

ia64:
ace0b517d6b4d26fdfc40744368053cd dump-0.4b25-1.72.2.ia64.rpm
f6ed788f99e81abdde859cbb4dabe1fb rmt-0.4b25-1.72.2.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/dump-0.4b25-1.72.2.src.rpm
a2105338ff2279973bcec74ea8dd96dd dump-0.4b25-1.72.2.src.rpm

i386:
b14ad2aef495fd52b2bfa8501147a86c dump-0.4b25-1.72.2.i386.rpm
1d658c6130d9b317456b56b6e21acd42 rmt-0.4b25-1.72.2.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/dump-0.4b25-1.72.2.src.rpm
a2105338ff2279973bcec74ea8dd96dd dump-0.4b25-1.72.2.src.rpm

i386:
b14ad2aef495fd52b2bfa8501147a86c dump-0.4b25-1.72.2.i386.rpm
1d658c6130d9b317456b56b6e21acd42 rmt-0.4b25-1.72.2.i386.rpm

Cause:   Access control error, State error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  2.1

Message History:   This archive entry is a follow-up to the message listed below.
Aug 3 2005 Dump Lets Local Users Deny Service By Locking a Certain File



 Source Message Contents

Subject:  [RHSA-2005:583-01] Low: dump security update


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- ---------------------------------------------------------------------
                   Red Hat Security Advisory

Synopsis:          Low: dump security update
Advisory ID:       RHSA-2005:583-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2005-583.html
Issue date:        2005-08-03
Updated on:        2005-08-03
Product:           Red Hat Enterprise Linux
CVE Names:         CAN-2002-1914
- ---------------------------------------------------------------------

1. Summary:

Updated dump packages that address two security issues are now available
for Red Hat Enterprise Linux 2.1.

This update has been rated as having low security impact by the Red Hat
Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1 - i386, ia64
Red Hat Linux Advanced Workstation 2.1 - ia64
Red Hat Enterprise Linux ES version 2.1 - i386
Red Hat Enterprise Linux WS version 2.1 - i386

3. Problem description:

Dump examines files in a file system, determines which ones need to be
backed up, and copies those files to a specified disk, tape, or other
storage medium.

A flaw was found with dump file locking.  A malicious local user could 
manipulate the file lock in such a way as to prevent dump from running.
The Common Vulnerabilities and Exposures project (cve.mitre.org) assigned
the name CAN-2002-1914 to this issue.

Users of dump should upgrade to these erratum packages, which contain a
patch to resolve this issue.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

This update is available via Red Hat Network.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

5. Bug IDs fixed (http://bugzilla.redhat.com/):

162903 - CAN-2002-1914 dump denial of service


6. RPMs required:

Red Hat Enterprise Linux AS (Advanced Server) version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/dump-0.4b25-1.72.2.src.rpm
a2105338ff2279973bcec74ea8dd96dd  dump-0.4b25-1.72.2.src.rpm

i386:
b14ad2aef495fd52b2bfa8501147a86c  dump-0.4b25-1.72.2.i386.rpm
1d658c6130d9b317456b56b6e21acd42  rmt-0.4b25-1.72.2.i386.rpm

ia64:
ace0b517d6b4d26fdfc40744368053cd  dump-0.4b25-1.72.2.ia64.rpm
f6ed788f99e81abdde859cbb4dabe1fb  rmt-0.4b25-1.72.2.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/dump-0.4b25-1.72.2.src.rpm
a2105338ff2279973bcec74ea8dd96dd  dump-0.4b25-1.72.2.src.rpm

ia64:
ace0b517d6b4d26fdfc40744368053cd  dump-0.4b25-1.72.2.ia64.rpm
f6ed788f99e81abdde859cbb4dabe1fb  rmt-0.4b25-1.72.2.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/dump-0.4b25-1.72.2.src.rpm
a2105338ff2279973bcec74ea8dd96dd  dump-0.4b25-1.72.2.src.rpm

i386:
b14ad2aef495fd52b2bfa8501147a86c  dump-0.4b25-1.72.2.i386.rpm
1d658c6130d9b317456b56b6e21acd42  rmt-0.4b25-1.72.2.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/dump-0.4b25-1.72.2.src.rpm
a2105338ff2279973bcec74ea8dd96dd  dump-0.4b25-1.72.2.src.rpm

i386:
b14ad2aef495fd52b2bfa8501147a86c  dump-0.4b25-1.72.2.i386.rpm
1d658c6130d9b317456b56b6e21acd42  rmt-0.4b25-1.72.2.i386.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

http://marc.theaimsgroup.com/?l=bugtraq&m=102701096228027
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1914

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2005 Red Hat, Inc.

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