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[gentoo-security] GLSA: dhcpcd
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Joined: 16 Apr 2002
Posts: 18350

PostPosted: Mon Jan 06, 2003 12:58 am    Post subject: [gentoo-security] GLSA: dhcpcd Reply with quote

Daniel Ahlberg wrote:
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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


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

emerge rsync
emerge dhcpcd
emerge clean

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