Date: Sun, 5 Jan 2003 01:31:46 +0100
From: Daniel Ahlberg <aliz@gentoo.org>
To: bugtraq@securityfocus.com
Subject: GLSA: dhcpcd
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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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aliz@gentoo.org - GnuPG key is available at www.gentoo.org/~aliz
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