Articles / Debian: uncontrolled progra…

Debian: uncontrolled program execution in Exim

Patrice Fournier discovered a bug in all versions of Exim older than Exim 3.34 and Exim 3.952. The Exim maintainer, Philip Hazel, writes about this issue: "The problem exists only in the case of a run time configuration which directs or routes an address to a pipe transport without checking the local part of the address in any way. This does not apply, for example, to pipes run from alias or forward files, because the local part is checked to ensure that it is the name of an alias or of a local user. The bug's effect is that, instead of obeying the correct pipe command, a broken Exim runs the command encoded in the local part of the address." Fixed packages are available from security.debian.org.
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Hash: SHA1

- --------------------------------------------------------------------------
Debian Security Advisory DSA 097-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
January 3rd, 2002  
- --------------------------------------------------------------------------

Package        : exim
Vulnerability  : Uncontrolled program execution
Problem-Type   : remote vulnerability
Debian-specific: no

Patrice Fournier discovered a bug in all versions of Exim older than
Exim 3.34 and Exim 3.952.

The Exim maintainer, Philip Hazel, writes about this issue: "The
problem exists only in the case of a run time configuration which
directs or routes an address to a pipe transport without checking the
local part of the address in any way.  This does not apply, for
example, to pipes run from alias or forward files, because the local
part is checked to ensure that it is the name of an alias or of a
local user.  The bug's effect is that, instead of obeying the correct
pipe command, a broken Exim runs the command encoded in the local part
of the address."

This problem has been fixed in Exim version 3.12-10.2 for the stable
distribution Debian GNU/Linux 2.2 and 3.33-1.1 for the testing and
unstable distribution.  We recommend that you upgrade your exim
package.

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:

    http://security.debian.org/dists/stable/updates/main/source/exim_3.12-10.2.dsc
      MD5 checksum: b4ddb9b27a1f8cf5aa1e022992cda856
    http://security.debian.org/dists/stable/updates/main/source/exim_3.12-10.2.diff.gz
      MD5 checksum: e40e72054293f7b129c26dee18258b45
    http://security.debian.org/dists/stable/updates/main/source/exim_3.12.orig.tar.gz
      MD5 checksum: 336cd605cb121703af4f22a8c34bb333

  Alpha architecture:

    http://security.debian.org/dists/stable/updates/main/binary-alpha/exim_3.12-10.2_alpha.deb
      MD5 checksum: 112e13e16ad884d4e6c0192b0106d271
    http://security.debian.org/dists/stable/updates/main/binary-alpha/eximon_3.12-10.2_alpha.deb
      MD5 checksum: ff0f7784379621681a4f67cddbb95af8

  ARM architecture:

    http://security.debian.org/dists/stable/updates/main/binary-arm/exim_3.12-10.2_arm.deb
      MD5 checksum: bfe611e97b22dd6c2b71f3aac57f59d3
    http://security.debian.org/dists/stable/updates/main/binary-arm/eximon_3.12-10.2_arm.deb
      MD5 checksum: 0fee5c8d7f084f50d21c981b0d793449

  Intel ia32 architecture:

    http://security.debian.org/dists/stable/updates/main/binary-i386/exim_3.12-10.2_i386.deb
      MD5 checksum: d5a2fc41c32504d9982416fbabc53629
    http://security.debian.org/dists/stable/updates/main/binary-i386/eximon_3.12-10.2_i386.deb
      MD5 checksum: 02ed4af9505089b21ccbe2d3391c4e51

  Motorola 680x0 architecture:

    http://security.debian.org/dists/stable/updates/main/binary-m68k/exim_3.12-10.2_m68k.deb
      MD5 checksum: baa17a9d5e237570c84e318a61443c0e
    http://security.debian.org/dists/stable/updates/main/binary-m68k/eximon_3.12-10.2_m68k.deb
      MD5 checksum: ddbd745f816b8231cb9f138ed8862f29

  PowerPC architecture:

    http://security.debian.org/dists/stable/updates/main/binary-powerpc/exim_3.12-10.2_powerpc.deb
      MD5 checksum: 87cb1b959c60c6733a23624e8444aaf4
    http://security.debian.org/dists/stable/updates/main/binary-powerpc/eximon_3.12-10.2_powerpc.deb
      MD5 checksum: 4ed78911a7cf58af0b7450020bb646fc

  Sun Sparc architecture:

    http://security.debian.org/dists/stable/updates/main/binary-sparc/exim_3.12-10.2_sparc.deb
      MD5 checksum: 8ff1e7534aa98722089d962b1b939770
    http://security.debian.org/dists/stable/updates/main/binary-sparc/eximon_3.12-10.2_sparc.deb
      MD5 checksum: 8e88f4730551fbc0f78630d6b0288bc5


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

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

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