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Mandrake Linux Security Update Advisory: gdm

Aug 21, 2001, 16:30 (0 Talkback[s])

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Date: Mon, 20 Aug 2001 17:10:15 -0600
From: Linux Mandrake Security Team <security@linux-mandrake.com>
Subject: MDKSA-2001:070 - gdm update

______________________________________________________________________

                Mandrake Linux Security Update Advisory
______________________________________________________________________

Package name:           gdm
Date:                   August 20th, 2001
Advisory ID:            MDKSA-2001:070

Affected versions:      8.0
______________________________________________________________________

Problem Description:

 A buffer overrun exists in the XDMCP handling code used in gdm.  By
 sending a properly crafted XDMCP message, it is possible for a remote
 attacker to execute arbitrary commands as root on the susceptible
 machine.  By default, XDMCP is disabled in gdm.conf on Mandrake Linux.
______________________________________________________________________

References:

  http://www.securityfocus.com/bid/1233
______________________________________________________________________

Please verify the update prior to upgrading to ensure the integrity of
the downloaded package.  You can do this with the command:
  rpm --checksig package.rpm
You can get the GPG public key of the Mandrake Linux Security Team at
  http://www.linux-mandrake.com/en/security/RPM-GPG-KEYS
If you use MandrakeUpdate, the verification of md5 checksum and GPG
signature is performed automatically for you.

Mandrake Linux 8.0:
41c178fc24d9acb2ead1438e837f0325  8.0/RPMS/gdm-2.2.3.2-2.1mdk.i586.rpm
1688432b516b398ad1c20ac80c1d028f  8.0/SRPMS/gdm-2.2.3.2-2.1mdk.src.rpm
______________________________________________________________________

Bug IDs fixed (see https://qa.mandrakesoft.com for more information):

______________________________________________________________________

To upgrade automatically, use MandrakeUpdate.

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

You can download the updates directly from one of the mirror sites
listed at:

  http://www.linux-mandrake.com/en/ftp.php3.

Updated packages are available in the "updates/[ver]/RPMS/" directory.
For example, if you are looking for an updated RPM package for
Mandrake Linux 8.0, look for it in "updates/8.0/RPMS/".  Updated source
RPMs are available as well, but you generally do not need to download
them.

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

You can view other security advisories for Mandrake Linux at:

  http://www.linux-mandrake.com/en/security/

If you want to report vulnerabilities, please contact

  security@linux-mandrake.com
______________________________________________________________________

Mandrake Linux has two security-related mailing list services that
anyone can subscribe to:

security-announce@linux-mandrake.com

  Mandrake Linux's security announcements mailing list.  Only
  announcements are sent to this list and it is read-only.

security-discuss@linux-mandrake.com

  Mandrake Linux's security discussion mailing list.  This list is open
  to anyone to discuss Mandrake Linux security specifically and Linux
  security in general.

To subscribe to either list, send a message to
  sympa@linux-mandrake.com
with "subscribe [listname]" in the body of the message.

To remove yourself from either list, send a message to
  sympa@linux-mandrake.com
with "unsubscribe [listname]" in the body of the message.

To get more information on either list, send a message to
  sympa@linux-mandrake.com
with "info [listname]" in the body of the message.

Optionally, you can use the web interface to subscribe to or unsubscribe
from either list:

  http://www.linux-mandrake.com/en/flists.php3#security