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

Synopsis:          Moderate: kernel security and bug fix update
Advisory ID:       RHSA-2011:0928-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2011-0928.html
Issue date:        2011-07-12
CVE Names:         CVE-2011-1767 CVE-2011-1768 CVE-2011-2479 
=====================================================================

1. Summary:

Updated kernel packages that fix multiple security issues and various bugs
are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Desktop (v. 6) - i386, noarch, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - noarch, x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, x86_64

3. Description:

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

This update fixes the following security issues:

* It was found that the receive hook in the ipip_init() function in the
ipip module, and in the ipgre_init() function in the ip_gre module, could
be called before network namespaces setup is complete. If packets were
received at the time the ipip or ip_gre module was still being loaded into
the kernel, it could cause a denial of service. (CVE-2011-1767,
CVE-2011-1768, Moderate)

* It was found that an mmap() call with the MAP_PRIVATE flag on "/dev/zero"
would create transparent hugepages and trigger a certain robustness check.
A local, unprivileged user could use this flaw to cause a denial of
service. (CVE-2011-2479, Moderate)

This update also fixes various bugs. Documentation for these bug fixes will
be available shortly from the Technical Notes document linked to in the
References section.

Users should upgrade to these updated packages, which contain backported
patches to resolve these issues, and fix the bugs noted in the Technical
Notes. 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
https://access.redhat.com/kb/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 (https://bugzilla.redhat.com/):

702303 - CVE-2011-1767 CVE-2011-1768 kernel: netns vs proto registration ordering
711546 - RHEL6.1 x86_64 HVM guest crashes on AMD host when guest memory size is larger than 8G
712413 - Cannot find the extended attribute of #11 inode after remount
712414 - [RHEL6.1] [Kernel] Panic while running testing
713135 - MLS - cgconfigparser cannot search on /cgroup/ dirs
713458 - intel-iommu: missing flush prior to removing domains + avoid broken vm/si domain unlinking
714190 - System Hang when there is smart error on IBM platform
714761 - CVE-2011-2479 kernel: thp: madvise on top of /dev/zero private mapping can lead to panic

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/kernel-2.6.32-131.6.1.el6.src.rpm

i386:
kernel-2.6.32-131.6.1.el6.i686.rpm
kernel-debug-2.6.32-131.6.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-131.6.1.el6.i686.rpm
kernel-debug-devel-2.6.32-131.6.1.el6.i686.rpm
kernel-debuginfo-2.6.32-131.6.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-131.6.1.el6.i686.rpm
kernel-devel-2.6.32-131.6.1.el6.i686.rpm
kernel-headers-2.6.32-131.6.1.el6.i686.rpm
perf-2.6.32-131.6.1.el6.i686.rpm
perf-debuginfo-2.6.32-131.6.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-131.6.1.el6.noarch.rpm
kernel-firmware-2.6.32-131.6.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-131.6.1.el6.x86_64.rpm
kernel-devel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-headers-2.6.32-131.6.1.el6.x86_64.rpm
perf-2.6.32-131.6.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-131.6.1.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/kernel-2.6.32-131.6.1.el6.src.rpm

noarch:
kernel-doc-2.6.32-131.6.1.el6.noarch.rpm
kernel-firmware-2.6.32-131.6.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-131.6.1.el6.x86_64.rpm
kernel-devel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-headers-2.6.32-131.6.1.el6.x86_64.rpm
perf-2.6.32-131.6.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-131.6.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/kernel-2.6.32-131.6.1.el6.src.rpm

i386:
kernel-2.6.32-131.6.1.el6.i686.rpm
kernel-debug-2.6.32-131.6.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-131.6.1.el6.i686.rpm
kernel-debug-devel-2.6.32-131.6.1.el6.i686.rpm
kernel-debuginfo-2.6.32-131.6.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-131.6.1.el6.i686.rpm
kernel-devel-2.6.32-131.6.1.el6.i686.rpm
kernel-headers-2.6.32-131.6.1.el6.i686.rpm
perf-2.6.32-131.6.1.el6.i686.rpm
perf-debuginfo-2.6.32-131.6.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-131.6.1.el6.noarch.rpm
kernel-firmware-2.6.32-131.6.1.el6.noarch.rpm

ppc64:
kernel-2.6.32-131.6.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-131.6.1.el6.ppc64.rpm
kernel-debug-2.6.32-131.6.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-131.6.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-131.6.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-131.6.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-131.6.1.el6.ppc64.rpm
kernel-devel-2.6.32-131.6.1.el6.ppc64.rpm
kernel-headers-2.6.32-131.6.1.el6.ppc64.rpm
perf-2.6.32-131.6.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-131.6.1.el6.ppc64.rpm

s390x:
kernel-2.6.32-131.6.1.el6.s390x.rpm
kernel-debug-2.6.32-131.6.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-131.6.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-131.6.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-131.6.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-131.6.1.el6.s390x.rpm
kernel-devel-2.6.32-131.6.1.el6.s390x.rpm
kernel-headers-2.6.32-131.6.1.el6.s390x.rpm
kernel-kdump-2.6.32-131.6.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-131.6.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-131.6.1.el6.s390x.rpm
perf-2.6.32-131.6.1.el6.s390x.rpm
perf-debuginfo-2.6.32-131.6.1.el6.s390x.rpm

x86_64:
kernel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-131.6.1.el6.x86_64.rpm
kernel-devel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-headers-2.6.32-131.6.1.el6.x86_64.rpm
perf-2.6.32-131.6.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-131.6.1.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/kernel-2.6.32-131.6.1.el6.src.rpm

i386:
kernel-2.6.32-131.6.1.el6.i686.rpm
kernel-debug-2.6.32-131.6.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-131.6.1.el6.i686.rpm
kernel-debug-devel-2.6.32-131.6.1.el6.i686.rpm
kernel-debuginfo-2.6.32-131.6.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-131.6.1.el6.i686.rpm
kernel-devel-2.6.32-131.6.1.el6.i686.rpm
kernel-headers-2.6.32-131.6.1.el6.i686.rpm
perf-2.6.32-131.6.1.el6.i686.rpm
perf-debuginfo-2.6.32-131.6.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-131.6.1.el6.noarch.rpm
kernel-firmware-2.6.32-131.6.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-131.6.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-131.6.1.el6.x86_64.rpm
kernel-devel-2.6.32-131.6.1.el6.x86_64.rpm
kernel-headers-2.6.32-131.6.1.el6.x86_64.rpm
perf-2.6.32-131.6.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-131.6.1.el6.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://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2011-1767.html
https://www.redhat.com/security/data/cve/CVE-2011-1768.html
https://www.redhat.com/security/data/cve/CVE-2011-2479.html
https://access.redhat.com/security/updates/classification/#moderate
https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.1_Technical_Notes/kernel.html#RHSA-2011-0928

8. Contact:

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

Copyright 2011 Red Hat, Inc.
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