| 1 |
-----BEGIN PGP SIGNED MESSAGE----- |
| 2 |
Hash: SHA1 |
| 3 |
|
| 4 |
- - -------------------------------------------------------------------- |
| 5 |
GENTOO LINUX SECURITY ANNOUNCEMENT 200301-3 |
| 6 |
- - -------------------------------------------------------------------- |
| 7 |
|
| 8 |
PACKAGE : dhcpcd |
| 9 |
SUMMARY : remote command execution |
| 10 |
DATE : 2003-01-05 00:01 UTC |
| 11 |
EXPLOIT : remote |
| 12 |
|
| 13 |
- - -------------------------------------------------------------------- |
| 14 |
|
| 15 |
When assigning an IP address to a network interface, dhcpcd may |
| 16 |
execute an external script, '/sbin/dhcpd-<interface>.exe'. |
| 17 |
This is an optional configuration that must be setup manually on |
| 18 |
Gentoo Linux systems by copying the script |
| 19 |
into /sbin/. |
| 20 |
|
| 21 |
The script 'dhcpcd-<interface>.exe' uses values from |
| 22 |
'/var/lib/dhcpcd/dhcpcd-<interface>.info', which originate from the |
| 23 |
DHCP server. A lack of input validation on this data may make it |
| 24 |
possible for commands injected by a malicious DHCP server to be |
| 25 |
executed through the use of shell metacharacters such as ';' and '|'. |
| 26 |
These commands may run with root privileges. |
| 27 |
|
| 28 |
More information is available at |
| 29 |
http://online.securityfocus.com/bid/6200/info/ |
| 30 |
|
| 31 |
SOLUTION |
| 32 |
|
| 33 |
It is recommended that all Gentoo Linux users who are running |
| 34 |
net-misc/dhcpcd-1.3.20_p0-r1 or earlier update their systems as |
| 35 |
follows: |
| 36 |
|
| 37 |
emerge rsync |
| 38 |
emerge dhcpcd |
| 39 |
emerge clean |
| 40 |
|
| 41 |
- - -------------------------------------------------------------------- |
| 42 |
aliz@g.o - GnuPG key is available at www.gentoo.org/~aliz |
| 43 |
- - -------------------------------------------------------------------- |
| 44 |
-----BEGIN PGP SIGNATURE----- |
| 45 |
Version: GnuPG v1.2.1 (GNU/Linux) |
| 46 |
|
| 47 |
iD8DBQE+F3zufT7nyhUpoZMRAm+hAKCzOXX6yIYWnhHXWYclGaTAmvx5iQCffolq |
| 48 |
/YhKi+P23DLiTsUoL9l5B98= |
| 49 |
=sCso |
| 50 |
-----END PGP SIGNATURE----- |
Archives