Debian: UPDATE: 'at' Heap corruption vulnerability
Posted by LinuxSecurity.com Team   
Debian Basically, this is the same Security Advisory as DSA 102-1, exceptthat the uploaded binary packages really fix the problem this time.

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Debian Security Advisory DSA 102-2                     security@debian.org 
http://www.debian.org/security/                             Martin Schulze
January 18th, 2002
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Package        : at
Vulnerability  : daemon exploit
Problem-Type   : local
Debian-specific: no

Basically, this is the same Security Advisory as DSA 102-1, except
that the uploaded binary packages really fix the problem this time.
Unfortunately the bugfix from DSA 102-1 wasn't propagated properly due
to a packaging bug.  While the file parsetime.y was fixed, and
yy.tab.c should be generated from it, yy.tab.c from the original
source was still used.  This has been fixed now.

The original advisory said:

zen-parse found a bug in the current implementation of at which leads
into a heap corruption vulnerability which in turn could potentially
lead into an exploit of the daemon user.

This has been fixed in at 3.1.8-10.2 for the stable Debian release and
3.1.8-11 for the unstable and testing release.  Packages for unstable
have just been uploaded into  <http://incoming.debian.org/>.  We
recommend that you upgrade your at packages immediately since an
exploit has already been published.

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/at_3.1.8-10.2.dsc
      MD5 checksum: 9375f0d34c84c87a80a161ee40dde042
     http://security.debian.org/dists/stable/updates/main/source/at_3.1.8-10.2.diff.gz
      MD5 checksum: 08d299a876e16819f4b93c9c7254e743
     http://security.debian.org/dists/stable/updates/main/source/at_3.1.8.orig.tar.gz
      MD5 checksum: 1e83522666118b3eab4cb8e345e6da5a

  Alpha architecture:

     http://security.debian.org/dists/stable/updates/main/binary-alpha/at_3.1.8-10.2_alpha.deb
      MD5 checksum: 9d05ea0036ec9bb6dc9181cce75816b6

  ARM architecture:

     http://security.debian.org/dists/stable/updates/main/binary-arm/at_3.1.8-10.2_arm.deb
      MD5 checksum: 2e969a1f2e138b5484d7a7e57fd57f28

  Intel ia32 architecture:

     http://security.debian.org/dists/stable/updates/main/binary-i386/at_3.1.8-10.2_i386.deb
      MD5 checksum: 3bd377404b28aafe13d9f4640fa82daf

  Motorola 680x0 architecture:

     http://security.debian.org/dists/stable/updates/main/binary-m68k/at_3.1.8-10.2_m68k.deb
      MD5 checksum: e882ac1a01fe4cba4f173ae037f45578

  PowerPC architecture:

     http://security.debian.org/dists/stable/updates/main/binary-powerpc/at_3.1.8-10.2_powerpc.deb
      MD5 checksum: 62b2b344129a9ef92f53fceca0ad000a

  Sun Sparc architecture:

     http://security.debian.org/dists/stable/updates/main/binary-sparc/at_3.1.8-10.2_sparc.deb
      MD5 checksum: f7f14d76692d28d70c494ee32273a449


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

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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/