FLSA-2005:152835: Updated dhcp package fixes security issue
Posted on: 07/10/2005 05:24 PM

Updated dhcp packages are available for Red Hat Linux 7.3

Fedora Legacy Update Advisory

Synopsis: Updated dhcp package fixes security issue
Advisory ID: FLSA:152835
Issue date: 2005-07-10
Product: Red Hat Linux
Keywords: Bugfix
CVE Names: CAN-2004-1006

1. Topic:

Updated dhcp packages that fix a security issue are now available.

dhcp is a DHCP (Dynamic Host Configuration Protocol) server and relay agent.

2. Relevant releases/architectures:

Red Hat Linux 7.3 - i386

3. Problem description:

"infamous41md" noticed that the log functions in dhcp 2.x pass parameters to a function that uses format strings. One use seems to be exploitable in connection with a malicious DNS server. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CAN-2004-1006 to this issue.

Users of dhcp are advised to upgrade to this errata package, which contains backported patches correcting this issue.

4. Solution:

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

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those RPMs which are currently installed will be updated. Those RPMs which are not installed but included in the list will not be updated. Note that you can also use wildcards (*.rpm) if your current directory *only* contains the desired RPMs.

Please note that this update is also available via yum and apt. Many people find this an easier way to apply updates. To use yum issue:

yum update

or to use apt:

apt-get update; apt-get upgrade

This will start an interactive process that will result in the appropriate RPMs being upgraded on your system. This assumes that you have yum or apt-get configured for obtaining Fedora Legacy content. Please visit http://www.fedoralegacy.org/docs for directions on how to configure yum and apt-get.

5. Bug IDs fixed:


6. RPMs required:

Red Hat Linux 7.3:


7. Verification:

SHA1 sum Package Name


These packages are GPG signed by Fedora Legacy for security. Our key is available from http://www.fedoralegacy.org/about/security.php

You can verify each package with the following command:

rpm --checksig -v lt;filenamegt;

If you only wish to verify that each package has not been corrupted or tampered with, examine only the sha1sum with the following command:

sha1sum lt;filenamegt;

8. References:


9. Contact:

The Fedora Legacy security contact is lt;secnotice@fedoralegacy.orggt;. More project details at http://www.fedoralegacy.org

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