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             AUSCERT External Security Bulletin Redistribution

                     ESB-2004.0301 -- RHSA-2004:166-01
         Updated kernel packages resolve security vulnerabilities
                               22 April 2004


        AusCERT Security Bulletin Summary

Product:                kernel
Publisher:              Red Hat
Operating System:       Red Hat Linux 9
Impact:                 Root Compromise
                        Denial of Service
                        Reduced Security
Access Required:        Remote
CVE Names:              CAN-2004-0003 CAN-2004-0109 CAN-2004-0177

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                   Red Hat Security Advisory

Synopsis:          Updated kernel packages resolve security vulnerabilities
Advisory ID:       RHSA-2004:166-01
Issue date:        2004-04-21
Updated on:        2004-04-21
Product:           Red Hat Linux
Cross references:  
Obsoletes:         RHSA-2004:065
CVE Names:         CAN-2004-0003 CAN-2004-0109 CAN-2004-0177
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1. Topic:

Updated kernel packages that fix several minor security vulnerabilities are
now available

2. Relevant releases/architectures:

Red Hat Linux 9 - athlon, i386, i586, i686

3. Problem description:

The Linux kernel handles the basic functions of the operating system.

iDefense reported a buffer overflow flaw in the ISO9660 filesystem code. 
An attacker could create a malicious filesystem in such a way that they
could gain root privileges if that filesystem is mounted.  The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CAN-2004-0109 to this issue.

Solar Designer from OpenWall discovered a minor information leak in the
ext3 filesystem code due to the lack of initialization of journal
descriptor blocks.  This flaw has only minor security implications and
exploitation requires privileged access to the raw device.  The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CAN-2004-0177 to this issue.

These packages also contain an updated fix with additional checks for
issues in the R128 Direct Render Infrastructure.  The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CAN-2004-0003 to this issue.

Additionally, hardening of the mremap function was applied to
prevent a potential local denial of service attack.

All users are advised to upgrade to these errata packages, which contain
backported security patches that correct these issues.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade.  Only those
RPMs which are currently installed will be updated.  Those RPMs which are
not installed but included in the list will not be updated.  Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network.  Many
people find this an easier way to apply updates.  To use Red Hat Network,
launch the Red Hat Update Agent with the following command:


This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

If up2date fails to connect to Red Hat Network due to SSL
Certificate Errors, you need to install a version of the
up2date client with an updated certificate.  The latest version of
up2date is available from the Red Hat FTP site and may also be
downloaded directly from the RHN website:


5. RPMs required:

Red Hat Linux 9:






6. Verification:

MD5 sum                          Package Name
- - --------------------------------------------------------------------------

0061cca9f47e3f6d90f75a6d05273e9d 9/en/os/SRPMS/kernel-2.4.20-31.9.src.rpm
806af5b5485efc5c20985df4caa67c73 9/en/os/athlon/kernel-2.4.20-31.9.athlon.rpm
db93f183e901f54c16ae9011a789061b 9/en/os/athlon/kernel-smp-2.4.20-31.9.athlon.rpm
fed12b86b5bbdbc504d3759ec9746bd5 9/en/os/i386/kernel-2.4.20-31.9.i386.rpm
d75837330b6bd151aa7dc41f0739cd5c 9/en/os/i386/kernel-BOOT-2.4.20-31.9.i386.rpm
f07cfe7307e1b3742f3f6471aa3dc9a9 9/en/os/i386/kernel-doc-2.4.20-31.9.i386.rpm
434b8067c7a15a21096e8f72fd2b913a 9/en/os/i386/kernel-source-2.4.20-31.9.i386.rpm
03714321817cd47c6ffbdd6378046c16 9/en/os/i586/kernel-2.4.20-31.9.i586.rpm
fc1e97e4187a038046974f8ee61dac98 9/en/os/i586/kernel-smp-2.4.20-31.9.i586.rpm
b9ff44df6f8950ae64febda7b6afa9c1 9/en/os/i686/kernel-2.4.20-31.9.i686.rpm
86246976656da74b05dd460a60e444b1 9/en/os/i686/kernel-bigmem-2.4.20-31.9.i686.rpm
df5e314e867757b8f420c17def224d56 9/en/os/i686/kernel-smp-2.4.20-31.9.i686.rpm

These packages are GPG signed by Red Hat for security.  Our key is
available from https://www.redhat.com/security/team/key.html

You can verify each package with the following command:
    rpm --checksig -v <filename>

If you only wish to verify that each package has not been corrupted or
tampered with, examine only the md5sum with the following command:
    md5sum <filename>

7. References:


8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://www.redhat.com/security/team/contact.html

Copyright 2004 Red Hat, Inc.
Version: GnuPG v1.0.7 (GNU/Linux)


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