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Red Hat: kernel (e-3) File metadata change vulnerability Print E-mail
User Rating:      How can I rate this item?
Posted by LinuxSecurity.com Team   
RedHat Linux Using NFS, a user could make unauthrized changes to files' GID.

Red Hat Security Advisory

Synopsis:          Updated kernel packages fix security vulnerabilities
Advisory ID:       RHSA-2004:360-01
Issue date:        2004-07-02
Updated on:        2004-07-02
Product:           Red Hat Enterprise Linux
Keywords:          taroon kernel security errata
Cross references:  
Obsoletes:         RHSA-2004:255
CVE Names:         CAN-2004-0497
- ---------------------------------------------------------------------

1. Topic:

Updated kernel packages that fix a security vulnerability affecting the
kernel nfs server for Red Hat Enterprise Linux 3 are now available.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AS version 3 - athlon, i386, i686, ia32e, ia64, ppc64, ppc64iseries, ppc64pseries, s390, s390x, x86_64
Red Hat Enterprise Linux ES version 3 - athlon, i386, i686, ia32e, ia64, x86_64
Red Hat Enterprise Linux WS version 3 - athlon, i386, i686, ia32e, ia64, x86_64

3. Problem description:

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

During an audit of the Linux kernel, SUSE discovered a flaw that allowed
a user to make unauthorized changes to the group ID of files in certain
circumstances. In the 2.4 kernel, as shipped with Red Hat Enterprise
Linux, the only way this could happen is through the kernel nfs server. A
user on a system that mounted a remote file system from a vulnerable
machine may be able to make unauthorized changes to the group ID of
exported files. The Common Vulnerabilities and Exposures project
(cve.mitre.org) has assigned the name CAN-2004-0497 to this issue.

Only Red Hat Enterprise Linux systems that are configured to share
file systems via NFS are affected by this issue.

All Red Hat Enterprise Linux 3 users are advised to upgrade their
kernels to the packages associated with their machine architectures
and configurations as listed in this erratum.

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:

up2date

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:

https://rhn.redhat.com/help/latest-up2date.pxt

5. RPMs required:

Red Hat Enterprise Linux AS version 3:

SRPMS: 
ftp://updates.redhat.com/enterprise/3AS/en/os/SRPMS/kernel-2.4.21-15.0.3.EL.src.rpm

athlon:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.athlon.rpm
Available from Red Hat Network: kernel-smp-2.4.21-15.0.3.EL.athlon.rpm
Available from Red Hat Network: kernel-smp-unsupported-2.4.21-15.0.3.EL.athlon.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.athlon.rpm

i386:
Available from Red Hat Network: kernel-BOOT-2.4.21-15.0.3.EL.i386.rpm
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.i386.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.i386.rpm

i686:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-hugemem-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-hugemem-unsupported-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-smp-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-smp-unsupported-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.i686.rpm

ia32e:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.ia32e.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.ia32e.rpm

ia64:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.ia64.rpm
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.ia64.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.ia64.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.ia64.rpm

ppc64:
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.ppc64.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.ppc64.rpm

ppc64iseries:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.ppc64iseries.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.ppc64iseries.rpm

ppc64pseries:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.ppc64pseries.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.ppc64pseries.rpm

s390:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.s390.rpm
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.s390.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.s390.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.s390.rpm

s390x:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.s390x.rpm
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.s390x.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.s390x.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.s390x.rpm

x86_64:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-smp-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-smp-unsupported-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.x86_64.rpm

Red Hat Enterprise Linux ES version 3:

SRPMS: 
ftp://updates.redhat.com/enterprise/3ES/en/os/SRPMS/kernel-2.4.21-15.0.3.EL.src.rpm

athlon:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.athlon.rpm
Available from Red Hat Network: kernel-smp-2.4.21-15.0.3.EL.athlon.rpm
Available from Red Hat Network: kernel-smp-unsupported-2.4.21-15.0.3.EL.athlon.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.athlon.rpm

i386:
Available from Red Hat Network: kernel-BOOT-2.4.21-15.0.3.EL.i386.rpm
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.i386.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.i386.rpm

i686:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-hugemem-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-hugemem-unsupported-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-smp-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-smp-unsupported-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.i686.rpm

ia32e:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.ia32e.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.ia32e.rpm

ia64:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.ia64.rpm
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.ia64.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.ia64.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.ia64.rpm

x86_64:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-smp-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-smp-unsupported-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.x86_64.rpm

Red Hat Enterprise Linux WS version 3:

SRPMS: 
ftp://updates.redhat.com/enterprise/3WS/en/os/SRPMS/kernel-2.4.21-15.0.3.EL.src.rpm

athlon:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.athlon.rpm
Available from Red Hat Network: kernel-smp-2.4.21-15.0.3.EL.athlon.rpm
Available from Red Hat Network: kernel-smp-unsupported-2.4.21-15.0.3.EL.athlon.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.athlon.rpm

i386:
Available from Red Hat Network: kernel-BOOT-2.4.21-15.0.3.EL.i386.rpm
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.i386.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.i386.rpm

i686:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-hugemem-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-hugemem-unsupported-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-smp-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-smp-unsupported-2.4.21-15.0.3.EL.i686.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.i686.rpm

ia32e:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.ia32e.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.ia32e.rpm

ia64:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.ia64.rpm
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.ia64.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.ia64.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.ia64.rpm

x86_64:
Available from Red Hat Network: kernel-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-doc-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-smp-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-smp-unsupported-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-source-2.4.21-15.0.3.EL.x86_64.rpm
Available from Red Hat Network: kernel-unsupported-2.4.21-15.0.3.EL.x86_64.rpm



6. Verification:

MD5 sum                          Package Name
- --------------------------------------------------------------------------
475ff576b3313ed4084c7e1e668395d0 kernel-2.4.21-15.0.3.EL.athlon.rpm
d70cf96391302020a322363fa2a1a0f6 kernel-2.4.21-15.0.3.EL.i686.rpm
00a8bdd6335934d6173135fc19f223d4 kernel-2.4.21-15.0.3.EL.ia32e.rpm
039107e887d34cacc117a21d8603a9a7 kernel-2.4.21-15.0.3.EL.ia64.rpm
e645e8f72418f3686ccdc99c3418b9c9 kernel-2.4.21-15.0.3.EL.ppc64iseries.rpm
012cd6cb22781e63bb3ce8b1b1f44e8e kernel-2.4.21-15.0.3.EL.ppc64pseries.rpm
97808a16163a1d5e35612ee5c3472a3f kernel-2.4.21-15.0.3.EL.s390.rpm
0d807eca7ba629ce12ceb152c72af472 kernel-2.4.21-15.0.3.EL.s390x.rpm
3aaebf2a78377c9fc76a1e6376dd9ffb kernel-2.4.21-15.0.3.EL.src.rpm
e0a8c6b852d5693a21dd3c1de13bcba0 kernel-2.4.21-15.0.3.EL.x86_64.rpm
dfc5ef35851cfc5e788cf837ac9b7bb3 kernel-BOOT-2.4.21-15.0.3.EL.i386.rpm
0cd3bcd3bb8781350e2d895ef89c213e kernel-doc-2.4.21-15.0.3.EL.i386.rpm
99c4217894bb83130336282c39b1e8b6 kernel-doc-2.4.21-15.0.3.EL.ia64.rpm
adad45b051a6798fa673f2d9a3f372e2 kernel-doc-2.4.21-15.0.3.EL.ppc64.rpm
591d48f31b8bb34aae3907d62f9823a0 kernel-doc-2.4.21-15.0.3.EL.s390.rpm
b06128421f53fb15fe0fc6cce6eebf90 kernel-doc-2.4.21-15.0.3.EL.s390x.rpm
ae4348ee1d4e108c535a6aef26f1c44d kernel-doc-2.4.21-15.0.3.EL.x86_64.rpm
934a743299a8692cacfeb4182a9845fe kernel-hugemem-2.4.21-15.0.3.EL.i686.rpm
df0cd8dd6539fc2e70113aae71d0111b kernel-hugemem-unsupported-2.4.21-15.0.3.EL.i686.rpm
3c1cfb8f5e6f33159532e49cca8f8e04 kernel-smp-2.4.21-15.0.3.EL.athlon.rpm
ccd4140c84ee4b03ef06f7b978018902 kernel-smp-2.4.21-15.0.3.EL.i686.rpm
82051afbea03dbc21c18ee8b8688d38b kernel-smp-2.4.21-15.0.3.EL.x86_64.rpm
81e73afe4183b246fe80a67a401835f2 kernel-smp-unsupported-2.4.21-15.0.3.EL.athlon.rpm
ec544f696a97180a395049aa56743645 kernel-smp-unsupported-2.4.21-15.0.3.EL.i686.rpm
a2e8ae8ff9a423d851e07fee6ef33abe kernel-smp-unsupported-2.4.21-15.0.3.EL.x86_64.rpm
54012be1c9ef18d56b5436d8968ea13d kernel-source-2.4.21-15.0.3.EL.i386.rpm
70a873ddcb6ec6c0395f987d04ea3b72 kernel-source-2.4.21-15.0.3.EL.ia64.rpm
06cb2b6084e4df9e0873c0f9387d88b1 kernel-source-2.4.21-15.0.3.EL.ppc64.rpm
5cb0e66a5e1e7494affd828e4e72f4e0 kernel-source-2.4.21-15.0.3.EL.s390.rpm
5a80ee66ff1a264273d919afad2d883f kernel-source-2.4.21-15.0.3.EL.s390x.rpm
373692205805a76d1ed9d8e28d11b455 kernel-source-2.4.21-15.0.3.EL.x86_64.rpm
532a4cff6acdbcd1d700a92d06519545 kernel-unsupported-2.4.21-15.0.3.EL.athlon.rpm
8c5162755364e6ad3c1de6bfe7d62fd3 kernel-unsupported-2.4.21-15.0.3.EL.i686.rpm
7c3463374ffffc1b29e4879386d90ec9 kernel-unsupported-2.4.21-15.0.3.EL.ia32e.rpm
656636cc71ba38ea1b8b890dd5d88dbd kernel-unsupported-2.4.21-15.0.3.EL.ia64.rpm
6064dc8ae3c1a29c082cf8df9d626de1 kernel-unsupported-2.4.21-15.0.3.EL.ppc64iseries.rpm
cb26ee54924bcec4433add0451210a3c kernel-unsupported-2.4.21-15.0.3.EL.ppc64pseries.rpm
01e658949728a7dc83c0ca83b2f51b2d kernel-unsupported-2.4.21-15.0.3.EL.s390.rpm
26fe4b56072f96a8b29bce7022449f18 kernel-unsupported-2.4.21-15.0.3.EL.s390x.rpm
87b05b779260e02473d87affc40c0db2 kernel-unsupported-2.4.21-15.0.3.EL.x86_64.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 

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 


7. References:
 
http://www.redhat.com/docs/manuals/enterprise/RHEL-3-Manual/ref-guide/s1-nfs-server-export.html 
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0497

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.

 
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