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Debian: 'procmail' unsafe signal handling Print E-mail
User Rating:      How can I rate this item?
Posted by LinuxSecurity.com Team   
Debian Using older versions of procmail it was possible to make procmail crash by sending it signals. On systems where procmail is installed setuid this could be exploited to obtain unauthorized privileges.

--------------------------------------------------------------------------
Debian Security Advisory DSA 083-1                     security@debian.org 
http://www.debian.org/security/                             Martin Schulze
October 18th, 2001
--------------------------------------------------------------------------

Package        : procmail
Vulnerability  : insecure signal handling
Problem-Type   : local root exploit
Debian-specific: no

Using older versions of procmail it was possible to make procmail
crash by sending it signals.  On systems where procmail is installed
setuid this could be exploited to obtain unauthorized privileges.

This problem has been fixed in version 3.20 by the upstream
maintainer, included in Debian unstable, and was ported back to
version 3.15.2 which is available for for the stable Debian GNU/Linux
2.2.

We recommend that you upgrade your procmail package 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:

     http://security.debian.org/dists/stable/updates/main/source/procmail_3.15.2-1.diff.gz
      MD5 checksum: 0cb94b0c0d122a01f40f121ea0ec6ade
     http://security.debian.org/dists/stable/updates/main/source/procmail_3.15.2-1.dsc
      MD5 checksum: 0c197e2629dc5aca44f08a97b94751ad
     http://security.debian.org/dists/stable/updates/main/source/procmail_3.15.2.orig.tar.gz
      MD5 checksum: 933c8f378082048f2d7f598dff9b760c

  Alpha architecture:

     http://security.debian.org/dists/stable/updates/main/binary-alpha/procmail_3.15.2-1_alpha.deb
      MD5 checksum: daf60f1b098153e852f2e8404acbf037

  ARM architecture:

     http://security.debian.org/dists/stable/updates/main/binary-arm/procmail_3.15.2-1_arm.deb
      MD5 checksum: 2e1b96787ccb90724db0b0dc97574a9a

  Intel ia32 architecture:

     http://security.debian.org/dists/stable/updates/main/binary-i386/procmail_3.15.2-1_i386.deb
      MD5 checksum: d7245b21110faf119e77705eaf724218

  Motorola 680x0 architecture:

     http://security.debian.org/dists/stable/updates/main/binary-m68k/procmail_3.15.2-1_m68k.deb
      MD5 checksum: f9bf3d4630d57abc6ff876d01174493f

  PowerPC architecture:

     http://security.debian.org/dists/stable/updates/main/binary-powerpc/procmail_3.15.2-1_powerpc.deb
      MD5 checksum: e2713f8a2862ddab38774a1708b85018

  Sun Sparc architecture:

     http://security.debian.org/dists/stable/updates/main/binary-sparc/procmail_3.15.2-1_sparc.deb
      MD5 checksum: 80635f04bd2bbfc991176438307d7371


  These files will 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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