Mandrake Linux Advisory: dhcp

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                Mandrake Linux Security Update Advisory
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Package name:           dhcp
Advisory ID:            MDKSA-2002:037
Date:                   May 29th, 2002
Affected versions:      7.2, 8.1, 8.2, Single Network Firewall 7.2
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Problem Description:

 Fermin J. Serna discovered a problem in the dhcp server and client
 package from versions 3.0 to 3.0.1rc8, which are affected by a format
 string vulnerability that can be exploited remotely.  By default, these
 versions of DHCP are compiled with the dns update feature enabled,
 which allows DHCP to update DNS records.  The code that logs this
 update has an exploitable format string vulnerability; the update 
 message can contain data provided by the attacker, such as a hostname.
 A successful exploitation could give the attacker elevated privileges
 equivalent to the user running the DHCP daemon, which is the user dhcpd
 in Mandrake Linux 8.x, but root in earlier versions.
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References:

 http://www.cert.org/advisories/CA-2002-12.html
 http://www.ngsec.com/docs/advisories/NGSEC-2002-2.txt
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Updated Packages:

 Linux-Mandrake 7.2:
 63c96314fca7bc3b5588e5d79b0061af  7.2/RPMS/dhcp-3.0b2pl9-4.1mdk.i586.rpm
 c4daa6288d8a5ca3efbb8b670c2f892e  7.2/RPMS/dhcp-client-3.0b2pl9-4.1mdk.i586.rpm
 b768b4211c5b8f27e579a30b14c39de7  7.2/RPMS/dhcp-relay-3.0b2pl9-4.1mdk.i586.rpm
 f7fa458ea1dcff467f6a275f29c46c58  7.2/SRPMS/dhcp-3.0b2pl9-4.1mdk.src.rpm

 Mandrake Linux 8.1:
 83e839b3daa8b5bc8b68b9c63416d1b1  8.1/RPMS/dhcp-client-3.0-0.rc12.2.1mdk.i586.rpm
 5888a11c60ee5c7610b1dc253fb717bb  8.1/RPMS/dhcp-common-3.0-0.rc12.2.1mdk.i586.rpm
 d0e736f945d830fef51b66d706b1603e  8.1/RPMS/dhcp-devel-3.0-0.rc12.2.1mdk.i586.rpm
 8c2882ea0f2949ce455043a7e2896275  8.1/RPMS/dhcp-relay-3.0-0.rc12.2.1mdk.i586.rpm
 2e592364d1585c7035637190328ede78  8.1/RPMS/dhcp-server-3.0-0.rc12.2.1mdk.i586.rpm
 f66331a2d7b4e7c449f71c1a8f52419e  8.1/SRPMS/dhcp-3.0-0.rc12.2.1mdk.src.rpm

 Mandrake Linux 8.1/ia64:
 752a9a7b2b6795d621a628e511245303  ia64/8.1/RPMS/dhcp-client-3.0-0.rc12.2.1mdk.ia64.rpm
 fe580cd77c3a81effd9a5763a047c608  ia64/8.1/RPMS/dhcp-common-3.0-0.rc12.2.1mdk.ia64.rpm
 6982f91d163ebb868851cc06b879d8d1  ia64/8.1/RPMS/dhcp-devel-3.0-0.rc12.2.1mdk.ia64.rpm
 a9f6335bddbe0a6e05bb89994a1f5bad  ia64/8.1/RPMS/dhcp-relay-3.0-0.rc12.2.1mdk.ia64.rpm
 e04122ee3308e71d6aeb5cb7fb0469b2  ia64/8.1/RPMS/dhcp-server-3.0-0.rc12.2.1mdk.ia64.rpm
 f66331a2d7b4e7c449f71c1a8f52419e  ia64/8.1/SRPMS/dhcp-3.0-0.rc12.2.1mdk.src.rpm

 Mandrake Linux 8.2:
 371df43752ff22e7fef14dcaba840cdd  8.2/RPMS/dhcp-client-3.0-1rc8.2.1mdk.i586.rpm
 a553a675f7846b76b3b59099694e60dc  8.2/RPMS/dhcp-common-3.0-1rc8.2.1mdk.i586.rpm
 7ed0e9de3c5ba558c90803cf76be07d9  8.2/RPMS/dhcp-devel-3.0-1rc8.2.1mdk.i586.rpm
 64692e67e6852dbe092ccafd9d3ed1cf  8.2/RPMS/dhcp-relay-3.0-1rc8.2.1mdk.i586.rpm
 0b727afbe2661aa95f5b2683ab70daae  8.2/RPMS/dhcp-server-3.0-1rc8.2.1mdk.i586.rpm
 468feef9cee73cf8b352cbdfbd1ec25f  8.2/SRPMS/dhcp-3.0-1rc8.2.1mdk.src.rpm

 Mandrake Linux 8.2/ppc:
 24d7cc2f572e27a578aecd8405cb7d97  ppc/8.2/RPMS/dhcp-client-3.0-1rc8.2.1mdk.ppc.rpm
 2487d99b2bb6369d84809204aef42983  ppc/8.2/RPMS/dhcp-common-3.0-1rc8.2.1mdk.ppc.rpm
 5d668bffa23b215fb2d3db351fe93ce2  ppc/8.2/RPMS/dhcp-devel-3.0-1rc8.2.1mdk.ppc.rpm
 48523da7eddd3853c91ad563c05eb576  ppc/8.2/RPMS/dhcp-relay-3.0-1rc8.2.1mdk.ppc.rpm
 051c1cf277ea455d8a2459074c3bf181  ppc/8.2/RPMS/dhcp-server-3.0-1rc8.2.1mdk.ppc.rpm
 468feef9cee73cf8b352cbdfbd1ec25f  ppc/8.2/SRPMS/dhcp-3.0-1rc8.2.1mdk.src.rpm

 Single Network Firewall 7.2:
 63c96314fca7bc3b5588e5d79b0061af  snf7.2/RPMS/dhcp-3.0b2pl9-4.1mdk.i586.rpm
 c4daa6288d8a5ca3efbb8b670c2f892e  snf7.2/RPMS/dhcp-client-3.0b2pl9-4.1mdk.i586.rpm
 b768b4211c5b8f27e579a30b14c39de7  snf7.2/RPMS/dhcp-relay-3.0b2pl9-4.1mdk.i586.rpm
 f7fa458ea1dcff467f6a275f29c46c58  snf7.2/SRPMS/dhcp-3.0b2pl9-4.1mdk.src.rpm
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Bug IDs fixed (see https://qa.mandrakesoft.com for more information):

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To upgrade automatically, use MandrakeUpdate.  The verification of md5
checksums and GPG signatures is performed automatically for you.

If you want to upgrade manually, download the updated package from one 
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm".  A list of
FTP mirrors can be obtained from:

  http://www.mandrakesecure.net/en/ftp.php

Please verify the update prior to upgrading to ensure the integrity of
the downloaded package.  You can do this with the command:

  rpm --checksig <filename>

All packages are signed by MandrakeSoft for security.  You can obtain
the GPG public key of the Mandrake Linux Security Team from:

  https://www.mandrakesecure.net/RPM-GPG-KEYS

Please be aware that sometimes it takes the mirrors a few hours to 
update.

You can view other update advisories for Mandrake Linux at:

  http://www.mandrakesecure.net/en/advisories/

MandrakeSoft has several security-related mailing list services that
anyone can subscribe to.  Information on these lists can be obtained by
visiting:

  http://www.mandrakesecure.net/en/mlist.php

If you want to report vulnerabilities, please contact

  security@linux-mandrake.com
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Type Bits/KeyID     Date       User ID
pub  1024D/22458A98 2000-07-10 Linux Mandrake Security Team
  <security@linux-mandrake.com>