Mandrake: rp-pppoe vulnerability
Posted by LinuxSecurity.com Team   
Mandrake Versions prior to 2.5 have a security problem that, when exploited, causes the connection to be dropped.

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                Linux-Mandrake Security Update Advisory
________________________________________________________________________

Package name:           rp-pppoe
Date:                   December 18th, 2000
Advisory ID:            MDKSA-2000:084

Affected versions:      7.1, 7.2
________________________________________________________________________

Problem Description:

 rp-pppoe is a userspace PPPoE client mainly used with ADSL connections
 which require PPP.  Versions prior to 2.5 have a security problem that,
 when exploited, causes the connection to be dropped.  If rp-pppoe
 receives a crafted TCP segment with an option where the option-length
 field is zero (illegal), the program would enter an infinite loop and
 the connection would time-out and be dropped.  This is only possible
 if the user uses the "Clamp MSS" option.
________________________________________________________________________

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 Linux-Mandrake 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.

Linux-Mandrake 7.1:
589bdccafbf374244ea2e940ae6df7ba  7.1/RPMS/rp-pppoe-2.5-2.1mdk.i586.rpm
e07be9faefcf1a58df48e872c9c7c068  7.1/SRPMS/rp-pppoe-2.5-2.1mdk.src.rpm

Linux-Mandrake 7.2:
d64a2bff24c05941624865facbc3ac8e  7.2/RPMS/rp-pppoe-2.5-2.2mdk.i586.rpm
0fdd0cc473288e52e64087025b93f341  7.2/SRPMS/rp-pppoe-2.5-2.2mdk.src.rpm
________________________________________________________________________

To upgrade automatically, use MandrakeUpdate.  

If you want to upgrade manually, download the updated package from one 
of our FTP server mirrors and uprade 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
Linux-Mandrake 7.2, look for it in "updates/7.2/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 Linux-Mandrake at:

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

If you want to report vulnerabilities, please contact

  security@linux-mandrake.com
________________________________________________________________________

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

security-announce@linux-mandrake.com

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

security-discuss@linux-mandrake.com

  Linux-Mandrake's security discussion mailing list.  This list is open
  to anyone to discuss Linux-Mandrake 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
________________________________________________________________________

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


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