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GENTOO LINUX SECURITY ANNOUNCEMENT 200301-3
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PACKAGE : dhcpcd
SUMMARY : remote command execution
DATE    : 2003-01-05 00:01 UTC
EXPLOIT : remote

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When assigning an IP address to a network interface, dhcpcd may 
execute an external script, '/sbin/dhcpd-<interface>.exe'. 
This is an optional configuration that must be setup manually on 
Gentoo Linux systems by copying the script 
into /sbin/. 
 
The script 'dhcpcd-<interface>.exe' uses values from 
'/var/lib/dhcpcd/dhcpcd-<interface>.info', which originate from
 the 
DHCP server. A lack of input validation on this data may make it 
possible for commands injected by a malicious DHCP server to be 
executed through the use of shell metacharacters such as ';' and
 '|'. 
These commands may run with root privileges.

More information is available at
http://online.securityfocus.com/bid/6200/info/

SOLUTION

It is recommended that all Gentoo Linux users who are running
net-misc/dhcpcd-1.3.20_p0-r1 or earlier update their systems as 
follows:

emerge rsync
emerge dhcpcd
emerge clean

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