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Debian Security Advisory DSA 081-1                     security@debian.org 
Debian -- Security Information                              Martin Schulze
October 18th, 2001
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Packages       : w3m, w3m-ssl
Vulnerability  : Buffer Overflow
Problem-Type   : remote code execution
Debian-specific: no

In SNS Advisory No. 32 a buffer overflow vulnerability has been
reported in the routine which parses MIME headers that are returned
from web servers.  A malicious web server administrator could exploit
this and let the client web browser execute arbitrary code.

W3m handles MIME headers included in the request/response message of
HTTP communication like any other we bbrowser.  A buffer overflow will
be occur when w3m receives a MIME encoded header with base64 format.

This problem has been fixed by the maintainer in version
0.1.10+0.1.11pre+kokb23-4 of w3m and w3m-ssl (for the SSL-enabled
version), both for Debian GNU/Linux 2.2.

We recommend that you upgrade your w3m 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: 94e868f1fa21be50a56d40007a21acc6
      
      MD5 checksum: 8f4503bbc966761d806d770fe1632450
      
      MD5 checksum: 46bd8e55a198036391b57a847486c303
      
      MD5 checksum: 6bc881ce595e5f723bcbd61dc6520523
      
      MD5 checksum: c857fd94c8e76f451ddfc3e59ce2d678

  Alpha architecture:

      
      MD5 checksum: 2da17834f750361ef11f956aea86bcdc
      
      MD5 checksum: b5b17b0ab958e1ce5ae82998c8c52a21

  ARM architecture:

      
      MD5 checksum: da67534b0182355a57618231addd92ae
      
      MD5 checksum: cd5a22df1fbca97ec3ce9d7a6760ab41

  Intel ia32 architecture:

      
      MD5 checksum: 7b811019f0f246338cbf438952358b54
      
      MD5 checksum: 07c9aa2738a22e4984c290657c71b79d

  PowerPC architecture:

      
      MD5 checksum: 64211980c4101e493aa2c0f906c6be9c

  Sun Sparc architecture:

      
      MD5 checksum: 4016ba11b084cd94e6023b47e7270f74
      
      MD5 checksum: 4a50edab63b9fe3c6c40638902018ebb


  w3m-ssl is not available for stable/powerpc and neither w3m nor
  w3m-ssl are available for m68k.

  These files will 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/