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Debian Security Advisory DSA 121-1                     security@debian.org 
Debian -- Security Information                              Martin Schulze
March 11th, 2002
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Package        : xtell
Vulnerability  : buffer overflow, symlink problem, ".." directory traversal
Problem-Type   : remote
Debian-specific: no

Several security related problems have been found in the xtell
package, a simple messaging client and server.  In detail, these
problems contain several buffer overflows, a problem in connection
with symbolic links, unauthorized directory traversal when the path
contains "..".  These problems could lead into an attacker being able
to execute arbitrary code on the server machine.  The server runs with
nobody privileges by default, so this would be the account to be
exploited.

They have been corrected by backporting changes from a newer upstream
version by the Debian maintainer for xtell.  These problems are fixed
in version 1.91.1 in the stable distribution of Debian and in version
2.7 for the testing and unstable distribution of Debian.

We recommend that you upgrade your xtell packages immediately.

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
        will update the internal database
apt-get upgrade
        will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.


Debian GNU/Linux 2.2 alias potato
------------------------------------

  Source archives:

      
      MD5 checksum: a7dbe82b7a451bc5153f8c42efe5bef5
      
      MD5 checksum: e6a2b22c793e1dba11b1ea0f10a07029

  Alpha architecture:

      
      MD5 checksum: 0901b8b491b27be14e7679ac04bc2d2a

  ARM architecture:

      
      MD5 checksum: be3416176f8b445d26b99bb42b387606

  Intel ia32 architecture:

      
      MD5 checksum: 15dba43eec2b9b24a04523b27e621bbd

  Motorola 680x0 architecture:

      
      MD5 checksum: ac0c36244ed3d72cae452fc9553036ca

  PowerPC architecture:

      
      MD5 checksum: 4a76e260f54eaae84688e28a18b98add

  Sun Sparc architecture:

      
      MD5 checksum: d250b1652599b54d2dbb52ce216a3afa


  These files will probably be moved into the stable distribution on
  its next revision.

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For apt-get: deb  Debian -- Security Information  stable/updates main
For dpkg-ftp:    dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show ' and  http://packages.debian.org/