Security update for package dhcpcd

Knowledgebase

(Last modified: 02OCT2002)

solutions Security update for package dhcpcd SuSE Linux Maintenance Web (55a4bb0c62f72123ff8fd9fef2ce04cd)

Applies to

Product(s): SuSE Linux Database Server
SuSE Linux Admin-CD for Firewall
SuSE Linux Enterprise Server 7 for IBM zSeries
SuSE eMail Server III
SuSE Linux Enterprise Server 7 for PowerPC
SuSE Linux Enterprise Server 7 for IA32
SuSE Linux Enterprise Server 7 for IA64
SuSE Linux Enterprise Server 7 for S/390 and zSeries
SuSE Linux Enterprise Server for S/390
SuSE eMail Server 3.1
SuSE Linux Office Server
SuSE Firewall Adminhost VPN
SuSE Linux Connectivity Server

Package: dhcpcd
Release: 20021002
Obsoletes: none

Indications

Everyone using the DHCP client dÆmon

dhcpcd</kdb> should install this patch.

Contraindications

None.

Problem description

 The dhcpcd

DHCP client daemon has the ability to execute an external script named /sbin/dhcpcd-<interface>.exe when assigning a new IP address. This is a shell script that can be used to perform additional system configuration jobs using information supplied by the DHCP server. It is not installed by default, however.
The script obtains the DHCP information by sourcing a file named /var/lib/dhcpcd/dhcpcd-<interface>.info, containing a list of shell variable assignments. Insufficient quoting of these assignments allowed malicious DHCP servers (or attackers able to spoof DHCP responses) to execute arbitrary shell commands on the DHCP client if the user had installed the dhcpcd-<interface>.exe script in /sbin.
If you are using the dhcpcd-<interface>.exe feature, it is strongly recommended you upgrade the dhcpcd package.

Solution

Please install the updates provided at the location noted below.

Installation notes

This update is provided as an RPM package that can easily be installed onto a running system by using this command:
rpm -Uvh dhcpcd.rpm
Please restart the dÆmon after the update with
rcdhcpcd restart

links to download packages

Download Source Packages

Download the source code of the patches for maintained products.

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