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UNIRAS Brief - 383/03 - Debian - several local, remote Vulnerabilities in kernel-source-2.2.20, kernel-image-2.2.20-i386


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   UNIRAS (UK Govt CERT) Briefing Notice - 383/03 dated 04.07.03  Time: 11:45
 UNIRAS is part of NISCC(National Infrastructure Security Co-ordination Centre)
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  UNIRAS material is also available from its website at www.uniras.gov.uk and
         Information about NISCC is available from www.niscc.gov.uk
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Debian Security Advisory:

several local, remote Vulnerabilities in kernel-source-2.2.20, kernel-image-2.2.20-i386


Hash: SHA1

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Debian Security Advisory DSA 336-2                     security@xxxxxxxxxx
http://www.debian.org/security/                             Matt Zimmerman
June 29th, 2003                         http://www.debian.org/security/faq
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Package        : kernel-source-2.2.20, kernel-image-2.2.20-i386
Vulnerability  : several
Problem-Type   : local, remote
Debian-specific: no
CVE Ids        : CVE-2002-0429 CAN-2003-0001 CAN-2003-0127 CAN-2003-0364 CAN-2002-1380

NOTE: This advisory is being released as a factual correction to
DSA-336-1.  In an administrative error, DSA-336-1 listed several CVE
names which did not, in fact, apply to Linux 2.2.20, and omitted one
vulnerability which was fixed in the updated packages.  The packages
are (and were) correct, and remain unchanged.  The package changelog
contains the correct information.  This advisory provides updated
information only.

A number of vulnerabilities have been discovered in the Linux kernel.

- - - CVE-2002-0429: The iBCS routines in arch/i386/kernel/traps.c for
  Linux kernels 2.4.18 and earlier on x86 systems allow local users to
  kill arbitrary processes via a a binary compatibility interface

- - - CAN-2003-0001: Multiple ethernet Network Interface Card (NIC) device
  drivers do not pad frames with null bytes, which allows remote
  attackers to obtain information from previous packets or kernel
  memory by using malformed packets

- - - CAN-2003-0127: The kernel module loader allows local users to gain
  root privileges by using ptrace to attach to a child process that is
  spawned by the kernel

- - - CAN-2003-0364: The TCP/IP fragment reassembly handling in the Linux
  kernel 2.4 allows remote attackers to cause a denial of service (CPU
  consumption) via certain packets that cause a large number of hash
  table collisions

- - - CAN-2002-1380: Linux kernel 2.2.x allows local users to cause a
  denial of service (crash) by using the mmap() function with a
  PROT_READ parameter to access non-readable memory pages through the
  /proc/pid/mem interface.

This advisory provides updated 2.2.20 kernel source, and binary kernel
images for the i386 architecture.  Other architectures and kernel
versions will be covered by separate advisories.

For the stable distribution (woody) on the powerpc architecture, these
problems have been fixed in kernel-source-2.2.20 version
2.2.20-5woody2 and kernel-image-i386 version 2.2.20-5woody3.

For the unstable distribution (sid) these problems are fixed in
kernel-source-2.2.25 and kernel-image-2.2.25-i386 version 2.2.25-2.

We recommend that you update your kernel packages.

NOTE: A system reboot will be required immediately after the upgrade
in order to replace the running kernel.  Remember to read carefully
and follow the instructions given during the kernel upgrade process.

NOTE: These kernels are not binary-compatible with the previous
version.  Any loadable modules will need to be recompiled in order to
work with the new kernel.

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:

      Size/MD5 checksum:      661 d3215fce4f216c046cccff92446e7918
      Size/MD5 checksum:   159446 a579fda249086961d987de8781049f78
      Size/MD5 checksum: 19394649 57c0edf86cb23a5b215db9121c9b3557
      Size/MD5 checksum:      834 fa03ee805dd5024d730f49e0316dbf53
      Size/MD5 checksum:    13928 0ccb61809634f83fd20de3079deb297c

  Architecture independent components:

      Size/MD5 checksum:  1162314 d3f23563af939c6d1f68860ce0419744
      Size/MD5 checksum: 15848472 0682fd4283579c341fa9ca27461cbad0

  Intel IA-32 architecture:

      Size/MD5 checksum:  1918624 d1d1f98e147fdf12a7374ff705ba89a7
      Size/MD5 checksum:  1867132 93d8ac12f8a884913ad88aeeb7a8ea1b
      Size/MD5 checksum:  1839328 e3fb8a95dd2a1ba641fd598a019879c0
      Size/MD5 checksum:  5901626 3fa8bae1676466e02992a1ce80009697
      Size/MD5 checksum:  1733362 5d5293e99f68cbabb1489226903f4895
      Size/MD5 checksum:  1395212 70389d3561e392a5487b493d24e2abfe

  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@xxxxxxxxxxxxxxxx
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>
Version: GnuPG v1.2.2 (GNU/Linux)


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Tel: +44 (0) 20 7821 1330 and follow the prompts

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UNIRAS wishes to acknowledge the contributions of Debian for the information
contained in this Briefing. 
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This Briefing contains the information released by the original author. Some 
of the information may have changed since it was released. If the vulnerability 
affects you, it may be prudent to retrieve the advisory from the canonical site 
to ensure that you receive the most current information concerning that problem.

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and has contacts with other international Incident Response Teams (IRTs) in 
order to foster cooperation and coordination in incident prevention, to prompt 
rapid reaction to incidents, and to promote information sharing amongst its 
members and the community at large. 
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