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

Synopsis:          Moderate: kernel security, bug fix, and enhancement update
Advisory ID:       RHSA-2011:0283-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2011:0283.html
Issue date:        2011-02-22
CVE Names:         CVE-2010-4165 CVE-2010-4169 CVE-2010-4243 
====================================================================
1. Summary:

Updated kernel packages that fix three security issues, several bugs, and
add two enhancements 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:

* A divide-by-zero flaw was found in the tcp_select_initial_window()
function in the Linux kernel's TCP/IP protocol suite implementation. A
local, unprivileged user could use this flaw to trigger a denial of service
by calling setsockopt() with certain options. (CVE-2010-4165, Moderate)

* A use-after-free flaw in the mprotect() system call in the Linux kernel
could allow a local, unprivileged user to cause a local denial of service.
(CVE-2010-4169, Moderate)

* A flaw was found in the Linux kernel execve() system call implementation.
A local, unprivileged user could cause large amounts of memory to be
allocated but not visible to the OOM (Out of Memory) killer, triggering a
denial of service. (CVE-2010-4243, Moderate)

Red Hat would like to thank Steve Chen for reporting CVE-2010-4165, and
Brad Spengler for reporting CVE-2010-4243.

This update also fixes several bugs and adds two enhancements.
Documentation for these bug fixes and enhancements 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 correct these issues, and fix the bugs and add the enhancements
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 (http://bugzilla.redhat.com/):

625688 - CVE-2010-4243 kernel: mm: mem allocated invisible to oom_kill() when not attached to any threads
651671 - CVE-2010-4169 kernel: perf bug
652508 - CVE-2010-4165 kernel: possible kernel oops from user MSS
652720 - read from virtio-serial returns if the host side is not connect to pipe [rhel-6.0.z]
658854 - [NetApp 6.1 bug] RHEL6.0 FC host hits kernel panic at scsi_error_handler [rhel-6.0.z]
658891 - [6.0.z FEAT] Port KVM bug fixes for cr_access to RHEL 6 [rhel-6.0.z]
659610 - [NetApp 6.1 bug] SCSI ALUA handler fails to handle ALUA transitioning properly [rhel-6.0.z]
660590 - [NetApp 6.1 bug] regression: allow offlined devs to be set to running [rhel-6.0.z]
661730 - NFS4 clients cannot reclaim locks after server reboot [rhel-6.0.z]
661731 - kernel: Problem with execve(2) reintroduced [rhel-6.1] [rhel-6.0.z]
661737 - xen PV guest kernel 2.6.32 processes lock up in D state [rhel-6.0.z]
662721 - Fix hot-unplug handling of virtio-console ports [rhel-6.0.z]
662921 - UV: WAR for interrupt-IOPort deadlock [rhel-6.0.z]
664398 - QLogic qla2xxx: Backport critical parts of 8.03.05.01.06.1-k0 to [rhel-6.0.z]
671342 - System panic in pskb_expand_head When arp_validate option is specified in bonding ARP monitor mode [rhel-6.0.z]
673978 - [NetApp 6.0 Bug] Erroneous TPG ID check in SCSI ALUA Handler [rhel-6.0.z]

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:

i386:
kernel-2.6.32-71.18.1.el6.i686.rpm
kernel-debug-2.6.32-71.18.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-71.18.1.el6.i686.rpm
kernel-debug-devel-2.6.32-71.18.1.el6.i686.rpm
kernel-debuginfo-2.6.32-71.18.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-71.18.1.el6.i686.rpm
kernel-devel-2.6.32-71.18.1.el6.i686.rpm
kernel-headers-2.6.32-71.18.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-71.18.1.el6.noarch.rpm
kernel-firmware-2.6.32-71.18.1.el6.noarch.rpm
perf-2.6.32-71.18.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-71.18.1.el6.x86_64.rpm
kernel-devel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-headers-2.6.32-71.18.1.el6.x86_64.rpm

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

Source:

noarch:
kernel-doc-2.6.32-71.18.1.el6.noarch.rpm
kernel-firmware-2.6.32-71.18.1.el6.noarch.rpm
perf-2.6.32-71.18.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-71.18.1.el6.x86_64.rpm
kernel-devel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-headers-2.6.32-71.18.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:

i386:
kernel-2.6.32-71.18.1.el6.i686.rpm
kernel-debug-2.6.32-71.18.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-71.18.1.el6.i686.rpm
kernel-debug-devel-2.6.32-71.18.1.el6.i686.rpm
kernel-debuginfo-2.6.32-71.18.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-71.18.1.el6.i686.rpm
kernel-devel-2.6.32-71.18.1.el6.i686.rpm
kernel-headers-2.6.32-71.18.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-71.18.1.el6.noarch.rpm
kernel-firmware-2.6.32-71.18.1.el6.noarch.rpm
perf-2.6.32-71.18.1.el6.noarch.rpm

ppc64:
kernel-2.6.32-71.18.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-71.18.1.el6.ppc64.rpm
kernel-debug-2.6.32-71.18.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-71.18.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-71.18.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-71.18.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-71.18.1.el6.ppc64.rpm
kernel-devel-2.6.32-71.18.1.el6.ppc64.rpm
kernel-headers-2.6.32-71.18.1.el6.ppc64.rpm

s390x:
kernel-2.6.32-71.18.1.el6.s390x.rpm
kernel-debug-2.6.32-71.18.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-71.18.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-71.18.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-71.18.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-71.18.1.el6.s390x.rpm
kernel-devel-2.6.32-71.18.1.el6.s390x.rpm
kernel-headers-2.6.32-71.18.1.el6.s390x.rpm
kernel-kdump-2.6.32-71.18.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-71.18.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-71.18.1.el6.s390x.rpm

x86_64:
kernel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-71.18.1.el6.x86_64.rpm
kernel-devel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-headers-2.6.32-71.18.1.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:

i386:
kernel-2.6.32-71.18.1.el6.i686.rpm
kernel-debug-2.6.32-71.18.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-71.18.1.el6.i686.rpm
kernel-debug-devel-2.6.32-71.18.1.el6.i686.rpm
kernel-debuginfo-2.6.32-71.18.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-71.18.1.el6.i686.rpm
kernel-devel-2.6.32-71.18.1.el6.i686.rpm
kernel-headers-2.6.32-71.18.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-71.18.1.el6.noarch.rpm
kernel-firmware-2.6.32-71.18.1.el6.noarch.rpm
perf-2.6.32-71.18.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-71.18.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-71.18.1.el6.x86_64.rpm
kernel-devel-2.6.32-71.18.1.el6.x86_64.rpm
kernel-headers-2.6.32-71.18.1.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-2010-4165.html
https://www.redhat.com/security/data/cve/CVE-2010-4169.html
https://www.redhat.com/security/data/cve/CVE-2010-4243.html
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/search/

8. Contact:

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

Copyright 2011 Red Hat, Inc.
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