Operating System:

Published:

28 July 2005

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                     ESB-2005.0594 -- RHSA-2005:603-01
                     Moderate: dhcpcd security update
                               28 July 2005

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

Product:           dhcpcd (DHCP Client Daemon)
Publisher:         Red Hat
Operating System:  Red Hat Linux Advanced Workstation 2.1
                   Red Hat Enterprise Linux AS/ES/WS 2.1
                   Linux variants
                   UNIX variants
Impact:            Denial of Service
Access:            Remote/Unauthenticated
CVE Names:         CAN-2005-1848

Original Bulletin: https://rhn.redhat.com/errata/RHSA-2005-603.html

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                   Red Hat Security Advisory

Synopsis:          Moderate: dhcpcd security update
Advisory ID:       RHSA-2005:603-01
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2005-603.html
Issue date:        2005-07-27
Updated on:        2005-07-27
Product:           Red Hat Enterprise Linux
CVE Names:         CAN-2005-1848
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1. Summary:

An updated dhcpcd package that fixes a denial of service issue is
now available.

This update has been rated as having moderate 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:

The dhcpcd package includes a DHCP client daemon.

An out of bounds memory read bug was found in dhcpcd.  A malicious user on
the local network could send a specially crafted DHCP packet to the client
causing it to crash.  The Common Vulnerabilities and Exposures project
assigned the name CAN-2005-1848 to this issue. 

Users of dhcpcd should update to this erratum package, which contains a
patch that resolves 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/):

162009 - CAN-2005-1848 dhcpcd bad packet crash


6. RPMs required:

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

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AS/en/os/SRPMS/dhcpcd-1.3.20pl0-2.src.rpm
b2d5aa9d71b2332f0a90a4d91c66f505  dhcpcd-1.3.20pl0-2.src.rpm

i386:
e2accda34fcf2949a6b0d96b448f664a  dhcpcd-1.3.20pl0-2.i386.rpm

ia64:
4f766b091e10331658f38828df7dd985  dhcpcd-1.3.20pl0-2.ia64.rpm

Red Hat Linux Advanced Workstation 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1AW/en/os/SRPMS/dhcpcd-1.3.20pl0-2.src.rpm
b2d5aa9d71b2332f0a90a4d91c66f505  dhcpcd-1.3.20pl0-2.src.rpm

ia64:
4f766b091e10331658f38828df7dd985  dhcpcd-1.3.20pl0-2.ia64.rpm

Red Hat Enterprise Linux ES version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1ES/en/os/SRPMS/dhcpcd-1.3.20pl0-2.src.rpm
b2d5aa9d71b2332f0a90a4d91c66f505  dhcpcd-1.3.20pl0-2.src.rpm

i386:
e2accda34fcf2949a6b0d96b448f664a  dhcpcd-1.3.20pl0-2.i386.rpm

Red Hat Enterprise Linux WS version 2.1:

SRPMS:
ftp://updates.redhat.com/enterprise/2.1WS/en/os/SRPMS/dhcpcd-1.3.20pl0-2.src.rpm
b2d5aa9d71b2332f0a90a4d91c66f505  dhcpcd-1.3.20pl0-2.src.rpm

i386:
e2accda34fcf2949a6b0d96b448f664a  dhcpcd-1.3.20pl0-2.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://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1848

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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