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Debian Security Advisory DSA 439-1                     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-image-2.4.16-lart, kernel-image-2.4.16-netwinder,  kernel-image-2.4.16-riscpc, kernel-patch-2.4.16-arm
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) this problem has been fixed in
version 2.4.26/20040204 of lart, netwinder and riscpc image and in
version 20040204 of kernel-patch-2.4.16-arm.

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

For the unstable distribution (sid) these problems 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-patch-2.4.16-arm/kernel-patch-2.4.16-arm_20040204.dsc
      Size/MD5 checksum:      562 7bd0b443e490132da8f26188ca560f75
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.16-arm/kernel-patch-2.4.16-arm_20040204.tar.gz
      Size/MD5 checksum:   579045 853b5f05e03217dfb47f28cf852dca4c

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.16-lart/kernel-image-2.4.16-lart_20040204.dsc
      Size/MD5 checksum:      586 e2cb96946739cfffd4327ae1e218a982
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.16-lart/kernel-image-2.4.16-lart_20040204.tar.gz
      Size/MD5 checksum:    16443 9b5b8c8311cc6ba23abc2e121882281a

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.16-netwinder/kernel-image-2.4.16-netwinder_20040204.dsc
      Size/MD5 checksum:      624 d2258e373574684da142a45ecfc4312f
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.16-netwinder/kernel-image-2.4.16-netwinder_20040204.tar.gz
      Size/MD5 checksum:    21783 fc07fb8db829045ef9a8ee6881e1af48

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.16-riscpc/kernel-image-2.4.16-riscpc_20040204.dsc
      Size/MD5 checksum:      592 f2252946f185d1c52796a68a1d442cb0
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.16-riscpc/kernel-image-2.4.16-riscpc_20040204.tar.gz
      Size/MD5 checksum:    19104 144bfd5b87a5daccf879049334b24bcd

  Architecture independent components:

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.16-arm/kernel-patch-2.4.16-arm_20040204_all.deb
      Size/MD5 checksum:   583148 6a4951879008cc3d882d6a30112d0cbc

  ARM architecture:

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.16-lart/kernel-image-2.4.16-lart_20040204_arm.deb
      Size/MD5 checksum:   717092 eb20d52fed79cfe95981f1838bc38e0c

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.16-netwinder/kernel-headers-2.4.16_20040204_arm.deb
      Size/MD5 checksum:  3421140 3e0dfbdcb48437ab733d43c92deb0157
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.16-netwinder/kernel-image-2.4.16-netwinder_20040204_arm.deb
      Size/MD5 checksum:  6671136 72f1f771e847c593e83179b6dbda4074

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.16-riscpc/kernel-image-2.4.16-riscpc_20040204_arm.deb
      Size/MD5 checksum:  2910348 c4fab31d10a137738aeb722eb7358488


  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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