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

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: kernel security update
Advisory ID:       RHSA-2010:0711-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2010-0711.html
Issue date:        2010-09-22
CVE Names:         CVE-2010-3081 
=====================================================================

1. Summary:

Updated kernel packages that fix one security issue are now available for
Red Hat Enterprise Linux 5.3 Extended Update Support.

The Red Hat Security Response Team has rated this update as having
important security impact. A Common Vulnerability Scoring System (CVSS)
base score, which gives a detailed severity rating, is available from the
CVE link in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5.3.z server) - i386, ia64, noarch, ppc, s390x, x86_64

3. Description:

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

This update fixes the following security issue:

* The compat_alloc_user_space() function in the Linux kernel 32/64-bit
compatibility layer implementation was missing sanity checks. This function
could be abused in other areas of the Linux kernel if its length argument
can be controlled from user-space. On 64-bit systems, a local, unprivileged
user could use this flaw to escalate their privileges. (CVE-2010-3081,
Important)

Red Hat would like to thank Ben Hawkes for reporting this issue.

Red Hat is aware that a public exploit for this issue is available. Refer
to Knowledgebase article DOC-40265 for further details:
https://access.redhat.com/kb/docs/DOC-40265

Users should upgrade to these updated packages, which contain a backported
patch to correct this issue. The system must be rebooted for this update to
take effect.

4. Solution:

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

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

To install kernel packages manually, use "rpm -ivh [package]". Do not
use "rpm -Uvh" as that will remove the running kernel binaries from
your system. You may use "rpm -e" to remove old kernels after
determining that the new kernel functions properly on your system.

5. Bugs fixed (http://bugzilla.redhat.com/):

634457 - CVE-2010-3081 kernel: 64-bit Compatibility Mode Stack Pointer Underflow

6. Package List:

Red Hat Enterprise Linux (v. 5.3.z server):

Source:
kernel-2.6.18-128.23.2.el5.src.rpm

i386:
kernel-2.6.18-128.23.2.el5.i686.rpm
kernel-PAE-2.6.18-128.23.2.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-128.23.2.el5.i686.rpm
kernel-PAE-devel-2.6.18-128.23.2.el5.i686.rpm
kernel-debug-2.6.18-128.23.2.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-128.23.2.el5.i686.rpm
kernel-debug-devel-2.6.18-128.23.2.el5.i686.rpm
kernel-debuginfo-2.6.18-128.23.2.el5.i686.rpm
kernel-debuginfo-common-2.6.18-128.23.2.el5.i686.rpm
kernel-devel-2.6.18-128.23.2.el5.i686.rpm
kernel-headers-2.6.18-128.23.2.el5.i386.rpm
kernel-xen-2.6.18-128.23.2.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-128.23.2.el5.i686.rpm
kernel-xen-devel-2.6.18-128.23.2.el5.i686.rpm

ia64:
kernel-2.6.18-128.23.2.el5.ia64.rpm
kernel-debug-2.6.18-128.23.2.el5.ia64.rpm
kernel-debug-debuginfo-2.6.18-128.23.2.el5.ia64.rpm
kernel-debug-devel-2.6.18-128.23.2.el5.ia64.rpm
kernel-debuginfo-2.6.18-128.23.2.el5.ia64.rpm
kernel-debuginfo-common-2.6.18-128.23.2.el5.ia64.rpm
kernel-devel-2.6.18-128.23.2.el5.ia64.rpm
kernel-headers-2.6.18-128.23.2.el5.ia64.rpm
kernel-xen-2.6.18-128.23.2.el5.ia64.rpm
kernel-xen-debuginfo-2.6.18-128.23.2.el5.ia64.rpm
kernel-xen-devel-2.6.18-128.23.2.el5.ia64.rpm

noarch:
kernel-doc-2.6.18-128.23.2.el5.noarch.rpm

ppc:
kernel-2.6.18-128.23.2.el5.ppc64.rpm
kernel-debug-2.6.18-128.23.2.el5.ppc64.rpm
kernel-debug-debuginfo-2.6.18-128.23.2.el5.ppc64.rpm
kernel-debug-devel-2.6.18-128.23.2.el5.ppc64.rpm
kernel-debuginfo-2.6.18-128.23.2.el5.ppc64.rpm
kernel-debuginfo-common-2.6.18-128.23.2.el5.ppc64.rpm
kernel-devel-2.6.18-128.23.2.el5.ppc64.rpm
kernel-headers-2.6.18-128.23.2.el5.ppc.rpm
kernel-headers-2.6.18-128.23.2.el5.ppc64.rpm
kernel-kdump-2.6.18-128.23.2.el5.ppc64.rpm
kernel-kdump-debuginfo-2.6.18-128.23.2.el5.ppc64.rpm
kernel-kdump-devel-2.6.18-128.23.2.el5.ppc64.rpm

s390x:
kernel-2.6.18-128.23.2.el5.s390x.rpm
kernel-debug-2.6.18-128.23.2.el5.s390x.rpm
kernel-debug-debuginfo-2.6.18-128.23.2.el5.s390x.rpm
kernel-debug-devel-2.6.18-128.23.2.el5.s390x.rpm
kernel-debuginfo-2.6.18-128.23.2.el5.s390x.rpm
kernel-debuginfo-common-2.6.18-128.23.2.el5.s390x.rpm
kernel-devel-2.6.18-128.23.2.el5.s390x.rpm
kernel-headers-2.6.18-128.23.2.el5.s390x.rpm
kernel-kdump-2.6.18-128.23.2.el5.s390x.rpm
kernel-kdump-debuginfo-2.6.18-128.23.2.el5.s390x.rpm
kernel-kdump-devel-2.6.18-128.23.2.el5.s390x.rpm

x86_64:
kernel-2.6.18-128.23.2.el5.x86_64.rpm
kernel-debug-2.6.18-128.23.2.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-128.23.2.el5.x86_64.rpm
kernel-debug-devel-2.6.18-128.23.2.el5.x86_64.rpm
kernel-debuginfo-2.6.18-128.23.2.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-128.23.2.el5.x86_64.rpm
kernel-devel-2.6.18-128.23.2.el5.x86_64.rpm
kernel-headers-2.6.18-128.23.2.el5.x86_64.rpm
kernel-xen-2.6.18-128.23.2.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-128.23.2.el5.x86_64.rpm
kernel-xen-devel-2.6.18-128.23.2.el5.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and 
details on how to verify the signature are available from
https://www.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2010-3081.html
http://www.redhat.com/security/updates/classification/#important
https://access.redhat.com/kb/docs/DOC-40265

8. Contact:

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

Copyright 2010 Red Hat, Inc.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)

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-----END PGP SIGNATURE-----

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