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Date: Thu, 27 Mar 2003 07:49:13 +0100 (CET)
From: joey@...odrom.org (Martin Schulze)
To: bugtraq@...urityfocus.com
Subject: [SECURITY] [DSA 270-1] New Linux kernel packages (mips + mipsel) fix local root exploit


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- --------------------------------------------------------------------------
Debian Security Advisory DSA 270-1                     security@...ian.org
http://www.debian.org/security/                             Martin Schulze
March 27sh, 2003                        http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Packages       : kernel-patch-2.4.17-mips, kernel-patch-2.4.19-mips
Vulnerability  : local privilege escalation
Problem-Type   : local
Debian-specific: no
CVE Id         : CAN-2003-0127

The kernel module loader in Linux 2.2 and Linux 2.4 kernels has a flaw
in ptrace.  This hole allows local users to obtain root privileges by
using ptrace to attach to a child process that is spawned by the
kernel.  Remote exploitation of this hole is not possible.

This advisory only covers kernel packages for the big and little endian MIPS
architectures.  Other architectures will be covered by separate advisories.

For the stable distribution (woody) this problem has been fixed in version
2.4.17-0.020226.2.woody1 of kernel-patch-2.4.17-mips (mips+mipsel) and in
version 2.4.19-0.020911.1.woody1 of kernel-patch-2.4.19-mips (mips only).

The old stable distribution (potato) is not affected by this problem
for these architectures since mips and mipsel were first released with
Debian GNU/Linux 3.0 (woody).

For the unstable distribution (sid) this problem has been fixed in
version 2.4.19-0.020911.6 of kernel-patch-2.4.19-mips (mips+mipsel).

We recommend that you upgrade your kernel-images packages immediately.


Upgrade Instructions
- --------------------

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 3.0 alias woody
- --------------------------------

  Source archives:

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips/kernel-patch-2.4.17-mips_2.4.17-0.020226.2.woody1.dsc
      Size/MD5 checksum:      786 937c32a962c27f9461a10d4d2c98c350
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips/kernel-patch-2.4.17-mips_2.4.17-0.020226.2.woody1.tar.gz
      Size/MD5 checksum:  1140097 e26c4406aa52e77b00df972335fdbb71

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-patch-2.4.19-mips_2.4.19-0.020911.1.woody1.dsc
      Size/MD5 checksum:      832 4e431992276bcd65d34bd07b86784200
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-patch-2.4.19-mips_2.4.19-0.020911.1.woody1.tar.gz
      Size/MD5 checksum:  1035256 cd2e9213d798552a7ebc550903e45bf9

  Architecture independent components:

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips/kernel-patch-2.4.17-mips_2.4.17-0.020226.2.woody1_all.deb
      Size/MD5 checksum:  1142510 b1c1c6d93281938651b91c0caa85b818

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-patch-2.4.19-mips_2.4.19-0.020911.1.woody1_all.deb
      Size/MD5 checksum:  1036948 8de25b980c15831460c844a535b76e3a

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips/kernel-headers-2.4.17_2.4.17-0.020226.2.woody1_mips.deb
      Size/MD5 checksum:  3494700 3ebb5ff6d044f808b500dfb0f5beccad
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips/kernel-image-2.4.17-r4k-ip22_2.4.17-0.020226.2.woody1_mips.deb
      Size/MD5 checksum:  2038950 baae9c9e139d2b5ef035f01adea32171
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips/kernel-image-2.4.17-r5k-ip22_2.4.17-0.020226.2.woody1_mips.deb
      Size/MD5 checksum:  2039084 5bb6ad7c4207a6f351612fd4e330a337

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-headers-2.4.19_2.4.19-0.020911.1.woody1_mips.deb
      Size/MD5 checksum:  3897722 8d096cf0e9286e175127dfb1763bfcd2
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-image-2.4.19-r4k-ip22_2.4.19-0.020911.1.woody1_mips.deb
      Size/MD5 checksum:  2072292 3f49ce11a63309465f1ee5c31b54a1c4
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-image-2.4.19-r5k-ip22_2.4.19-0.020911.1.woody1_mips.deb
      Size/MD5 checksum:  2072926 b4ac7b3f74a392c4f7482eb590eadcb2
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/mips-tools_2.4.19-0.020911.1.woody1_mips.deb
      Size/MD5 checksum:    12418 ec83e5bf008c27285768faffcbbd8534

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips/kernel-headers-2.4.17_2.4.17-0.020226.2.woody1_mipsel.deb
      Size/MD5 checksum:  3493956 68730ffdae0bd73800c5e9aef83094ca
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips/kernel-image-2.4.17-r3k-kn02_2.4.17-0.020226.2.woody1_mipsel.deb
      Size/MD5 checksum:  2193168 1ae735e62e4ff6c94b2741d0bad26d4c
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips/kernel-image-2.4.17-r4k-kn04_2.4.17-0.020226.2.woody1_mipsel.deb
      Size/MD5 checksum:  2189118 64001cdeae34c28e987bb4dca356213e
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-mips/mips-tools_2.4.17-0.020226.2.woody1_mipsel.deb
      Size/MD5 checksum:    14086 8a15ad3716a048cfac78184f67ec2985


  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@...ts.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>

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