-----BEGIN PGP SIGNED MESSAGE-----

===========================================================================
             AUSCERT External Security Bulletin Redistribution

            ESB-2004.0152 -- Debian Security Advisory DSA 442-1
     New Linux 2.4.17 packages fix local root exploits and more (s390)
                             23 February 2004

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:                kernel
Publisher:              Debian
Operating System:       Debian GNU/Linux 3.0
                        Linux
Platform:               IBM S/390
Impact:                 Denial of Service
                        Read-only Data Access
                        Increased Privileges
                        Root Compromise
Access Required:        Existing Account
                        Remote
CVE Names:              CAN-2003-0001 CAN-2003-0244 CAN-2003-0246
                        CAN-2003-0247 CAN-2003-0248 CAN-2003-0364
                        CAN-2003-0961 CAN-2003-0985 CAN-2004-0077
                        CVE-2002-0429

- --------------------------BEGIN INCLUDED TEXT--------------------

- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- - --------------------------------------------------------------------------
Debian Security Advisory DSA 442-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
February 19th, 2004                     http://www.debian.org/security/faq
- - --------------------------------------------------------------------------

Package        : kernel-patch-2.4.17-s390, kernel-image-2.4.17-s390
Vulnerability  : several
Problem-Type   : local, remote
Debian-specific: no
CVE ID         : CAN-2003-0001 CAN-2003-0244 CAN-2003-0246 CAN-2003-0247 CAN-2003-0248 CAN-2003-0364 CAN-2003-0961 CAN-2003-0985 CAN-2004-0077 CVE-2002-0429

Several security related problems have been fixed in the Linux kernel
2.4.17 used for the S/390 architecture, mostly by backporting fixes
from 2.4.18 and incorporating recent security fixes.  The corrections
are listed below with the identification from the Common
Vulnerabilities and Exposures (CVE) project:

CAN-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 (lcall)

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, as demonstrated by Etherleak.

CAN-2003-0244:

   The route cache implementation in Linux 2.4, and the Netfilter IP
   conntrack module, allows remote attackers to cause a denial of
   service (CPU consumption) via packets with forged source addresses
   that cause a large number of hash table collisions related to the
   PREROUTING chain

CAN-2003-0246:

   The ioperm system call in Linux kernel 2.4.20 and earlier does not
   properly restrict privileges, which allows local users to gain read
   or write access to certain I/O ports.

CAN-2003-0247:

   A vulnerability in the TTY layer of the Linux kernel 2.4 allows
   attackers to cause a denial of service ("kernel oops").

CAN-2003-0248:

   The mxcsr code in Linux kernel 2.4 allows attackers to modify CPU
   state registers via a malformed address.

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-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 2.4.17-2.woody.3 of s390 images and in version
0.0.20020816-0.woody.2 of the patch packages.

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-2.4.17-s390/kernel-patch-2.4.17-s390_0.0.20020816-0.woody.2.dsc
      Size/MD5 checksum:      754 8f59252c74198c796f544ac312cbf522
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-s390/kernel-patch-2.4.17-s390_0.0.20020816-0.woody.2.diff.gz
      Size/MD5 checksum:     5824 81d3c045df500f3e2da56de87b4c434d
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-s390/kernel-patch-2.4.17-s390_0.0.20020816.orig.tar.gz
      Size/MD5 checksum:   338001 5979fbe7c3325033536dfd3914e22dbd

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-s390/kernel-image-2.4.17-s390_2.4.17-2.woody.3.dsc
      Size/MD5 checksum:      793 fd4b67d1ba928ded93263c2d95327b65
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-s390/kernel-image-2.4.17-s390_2.4.17-2.woody.3.tar.gz
      Size/MD5 checksum:     7866 50f9e176f8d7fbf6eb6124bf864e6c48

  Architecture independent components:

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-s390/kernel-patch-2.4.17-s390_0.0.20020816-0.woody.2_all.deb
      Size/MD5 checksum:   300766 03b0017cad1c479c4109c0ad5f072ab0

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-s390/kernel-headers-2.4.17_2.4.17-2.woody.3_s390.deb
      Size/MD5 checksum:  3335312 84663c81b952cfa9407c84985f5623d7
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.17-s390/kernel-image-2.4.17-s390_2.4.17-2.woody.3_s390.deb
      Size/MD5 checksum:  1342758 b5cd48b7cde59c3893c983d95e451a23


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

- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)

iD8DBQFANIDVW5ql+IAeqTIRAhF4AJ4r4KGIT5BfOUaKkj+921/hSJmAlQCgnfyD
+1q5e8sAmpMe3BBkkz6dirA=
=m2Kl
- -----END PGP SIGNATURE-----

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        http://www.auscert.org.au/render.html?cid=1980

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        http://www.auscert.org.au/render.html?it=3192

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business 
                hours which are GMT+10:00 (AEST).  On call after hours 
                for member emergencies only.
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967

iQCVAwUBQDmiPCh9+71yA2DNAQFq4QP7B6N6lVDeUwn+ubm1A7Y1njkf4X/85erf
bCgrCv6s1oHvTIZgp0n2UBqr95GNyA0cFAjMLgH84bd/NFzi1a4MHpR9MAPA5z0p
FFYIus4xGBkb/VOjZlVs7+KXaClvA+00uH+dh2TSs9kzMTgjBmeTi7a3Fhc2jxYa
wfTUz3g8vXg=
=8XJP
-----END PGP SIGNATURE-----