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SuSE Security Announcement: dhclient

Jul 11, 2000, 19:54 (0 Talkback[s])
(Other stories by Thomas Biege)

Date: Tue, 11 Jul 2000 15:54:23 +0200 (CEST)
From: Thomas Biege thomas@suse.de
To: suse-security-announce@suse.com
Subject: [suse-security-announce] SuSE Security Announcement: dhclient

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                        SuSE Security Announcement

        Package:  dhclient < 2.0
        Date:     Tue Jul 11 15:12:22 CEST 2000

        Affected SuSE versions: 6.1-6.4
        Vulnerability Type:     remote root compromise
        SuSE default package:   no
        Other affected systems: all unix systems using this package

A security hole was discovered in the package mentioned above. Please update it as soon as possible or disable the service if you are using this software on your SuSE Linux installation(s).

Other Linux distributions or operating systems might be affected as well, please contact your vendor for information about this issue.

Please note that we provide this information on an "as-is" basis only. There is no warranty whatsoever and no liability for any direct, indirect or incidental damage arising from this information or the installation of the update package.


1. Problem Description

The client side program of the ISC DHCP package, dhclient, does not do quoting of server messages before passing them to /sbin/dhclient-script. This script is executed with root privileges.

2. Impact

Dhclient could be tricked by a rogue DHCP server to execute commands as user root. This leads to a remote root compromise of the system using dhclient.

3. Solution

Update the package from our FTP server.


Please verify these md5 checksums of the updates before installing: (For SuSE 6.0, please use the 6.1 updates)

AXP:
262677203e3b1dada23e65ae60d08264 ftp://ftp.suse.com/pub/suse/axp/update/6.3/n1/dhclient-2.0pl2-3.alpha.rpm
910097426b5771c82abf8f323086b5ba ftp://ftp.suse.com/pub/suse/axp/update/6.4/n1/dhclient-2.0pl2-3.alpha.rpm

i386:
300a7c8220d3b9f65a2aef3ed4fdb7b3 ftp://ftp.suse.com/pub/suse/i386/update/6.1/n1/dhclient-2.0pl2-3.i386.rpm
7be68cd54e7fd3766b7eb36fc2e854c5 ftp://ftp.suse.com/pub/suse/i386/update/6.2/n1/dhclient-2.0pl2-3.i386.rpm
44fad0cee0cb53627ed7c507077d5d2b ftp://ftp.suse.com/pub/suse/i386/update/6.3/n1/dhclient-2.0pl2-3.i386.rpm
320d4414841e29bd08584fc5d8592d99 ftp://ftp.suse.com/pub/suse/i386/update/6.4/n1/dhclient-2.0pl2-3.i386.rpm

PPC:
a8a19501e4821ab6c7b375972eb1e5ce ftp://ftp.suse.com/pub/suse/ppc/update/6.3/n1/dhclient-2.0pl2-3.ppc.rpm
b4ea052ba25b10586cc14f6fea5b2d9f ftp://ftp.suse.com/pub/suse/ppc/update/6.4/n1/dhclient-2.0pl2-3.ppc.rpm


You can find updates on our ftp-Server:
ftp://ftp.suse.com/pub/suse/i386/update for Intel processors
ftp://ftp.suse.com/pub/suse/axp/update for Alpha processors

or try the following web pages for a list of mirrors:
http://www.suse.de/ftp.html
http://www.suse.com/ftp_new.html

Our webpage for patches:
http://www.suse.de/patches/index.html

Our webpage for security announcements:
http://www.suse.de/security

If you want to report vulnerabilities, please contact security@suse.de


SuSE has got two free security mailing list services to which any interested party may subscribe:


suse-security@suse.com          - moderated and for general/linux/SuSE
                                  security discussions. All SuSE security
                                  announcements are sent to this list.

suse-security-announce@suse.com - SuSE's announce-only mailing list.
                                  Only SuSE's security annoucements are sent
                                  to this list.
To subscribe to the list, send a message to:
suse-security-subscribe@suse.com

To remove your address from the list, send a message to:
suse-security-unsubscribe@suse.com

Send mail to the following for info and FAQ for this list:
suse-security-info@suse.com
suse-security-faq@suse.com


This information is provided freely to everyone interested and may be redistributed provided that it is not altered in any way.

Type Bits/KeyID    Date       User ID
pub  2048/3D25D3D9 1999/03/06 SuSE Security Team 

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