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Debian Security Advisory DSA 440-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
February 18th, 2004                     http://www.debian.org/security/faq
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Package        : kernel-source-2.4.17, kernel-patch-2.4.17-apus
Vulnerability  : several vulnerabilities
Problem-Type   : local
Debian-specific: no
CVE ID         : CAN-2003-0961 CAN-2003-0985 CAN-2004-0077

Several local root exploits have been discovered recently in the Linux
kernel.  This security advisory updates the PowerPC/Apus kernel for
Debian GNU/Linux.  The Common Vulnerabilities and Exposures project
identifies the following problems that are fixed with this update:

CAN-2003-0961:

   An integer overflow in brk() system call (do_brk() function) for
   Linux allows a local attacker to gain root privileges.  Fixed
   upstream in Linux 2.4.23.

CAN-2003-0985:

   Paul Starzetz discovered a flaw in bounds checking in mremap() in
   the Linux kernel (present in version 2.4.x and 2.6.x) which may
   allow a local attacker to gain root privileges.  Version 2.2 is not
   affected by this bug.  Fixed upstream in Linux 2.4.24.

CAN-2004-0077:

   Paul Starzetz and Wojciech Purczynski of isec.pl discovered a
   critical security vulnerability in the memory management code of
   Linux inside the mremap(2) system call.  Due to missing function
   return value check of internal functions a local attacker can gain
   root privileges.  Fixed upstream in Linux 2.4.25 and 2.6.3.

For the stable distribution (woody) these problems have been fixed in
version 2.4.17-4 of powerpc/apus images.

Other architectures will probably mentioned in a separate advisory or
are not affected (m68k).

For the unstable distribution (sid) this problem will be fixed soon.

We recommend that you upgrade your Linux kernel 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-source-2.4.17/kernel-source-2.4.17_2.4.17-1woody2.dsc
      Size/MD5 checksum:      690 f4f41d8b5ce68462139eadff5e340b2f
    http://security.debian.org/pool/updates/main/k/kernel-source-2.4.17/kernel-source-2.4.17_2.4.17-1woody2.diff.gz
      Size/MD5 checksum:    38791 17b8f97671d0f1be7c595123bcf0c86c
    http://security.debian.org/pool/updates/main/k/kernel-source-2.4.17/kernel-source-2.4.17_2.4.17.orig.tar.gz
      Size/MD5 checksum: 29445154 d5de2a4dc49e32c37e557ef856d5d132

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-patch-2.4.17-apus_2.4.17-4.dsc
      Size/MD5 checksum:      667 beff21e365dba9487c3d1009e6bb8ce7
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-patch-2.4.17-apus_2.4.17-4.tar.gz
      Size/MD5 checksum:   489649 3feef2fdda2cb1385e12fb18b33c3787

  Architecture independent components:

    http://security.debian.org/pool/updates/main/k/kernel-source-2.4.17/kernel-doc-2.4.17_2.4.17-1woody2_all.deb
      Size/MD5 checksum:  1719904 4299b7aeebc01ede7eb5a2f2f5ba0b45
    http://security.debian.org/pool/updates/main/k/kernel-source-2.4.17/kernel-source-2.4.17_2.4.17-1woody2_all.deb
      Size/MD5 checksum: 23878388 15202df8a94f2aa17f09382f520021fc

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-headers-2.4.17-apus_2.4.17-4_powerpc.deb
      Size/MD5 checksum:  3365696 0f03db43dd1c83a6c02cbd474ae54685
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-image-2.4.17-apus_2.4.17-4_powerpc.deb
      Size/MD5 checksum:  2210948 1f12b255f6644f144e3426fa5865b27e
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-image-apus_2.4.17-4_powerpc.deb
      Size/MD5 checksum:     4078 6a495ea4088b900129c60dd769f7da8d
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-patch-2.4.17-apus_2.4.17-4_powerpc.deb
      Size/MD5 checksum:   490346 41eebb692f46cfcb118818048de6d6ad


  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 <pkg>' and http://packages.debian.org/<pkg>

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