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Red Hat Security Advisory 2012-0571-01

Red Hat Security Advisory 2012-0571-01
Posted May 15, 2012
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2012-0571-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way the Linux kernel's journal_unmap_buffer() function handled buffer head states. On systems that have an ext4 file system with a journal mounted, a local, unprivileged user could use this flaw to cause a denial of service. A flaw was found in the way the KVM_CREATE_IRQCHIP ioctl was handled. Calling this ioctl when at least one virtual CPU already existed could lead to a NULL pointer dereference later when the VCPU is scheduled to run. A local, unprivileged user on a KVM host could use this flaw to crash the host.

tags | advisory, denial of service, kernel, local
systems | linux, redhat
advisories | CVE-2011-4086, CVE-2012-1601
MD5 | 09d047028f30ae1cf7ab66f1d6c07d22

Red Hat Security Advisory 2012-0571-01

Change Mirror Download
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=====================================================================
Red Hat Security Advisory

Synopsis: Moderate: kernel security and bug fix update
Advisory ID: RHSA-2012:0571-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0571.html
Issue date: 2012-05-15
CVE Names: CVE-2011-4086 CVE-2012-1601
=====================================================================

1. Summary:

Updated kernel packages that fix two security issues and several 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 Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - noarch, x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, 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 flaw was found in the way the Linux kernel's journal_unmap_buffer()
function handled buffer head states. On systems that have an ext4 file
system with a journal mounted, a local, unprivileged user could use this
flaw to cause a denial of service. (CVE-2011-4086, Moderate)

* A flaw was found in the way the KVM_CREATE_IRQCHIP ioctl was handled.
Calling this ioctl when at least one virtual CPU (VCPU) already existed
could lead to a NULL pointer dereference later when the VCPU is scheduled
to run. A local, unprivileged user on a KVM host could use this flaw to
crash the host. (CVE-2012-1601, Moderate)

This update also fixes several bugs. Documentation for these changes 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 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/knowledge/articles/11258

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/):

749143 - CVE-2011-4086 kernel: jbd2: unmapped buffer with _Unwritten or _Delay flags set can lead to DoS
808199 - CVE-2012-1601 kernel: kvm: irqchip_in_kernel() and vcpu->arch.apic inconsistency
809374 - AMD IOMMU driver hands out dma handles that are in the MSI address range [rhel-6.2.z]
811135 - readdir64_r calls fail with ELOOP [rhel-6.2.z]
811299 - Fix RPC priority queue wake up all tasks processing [rhel-6.2.z]

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/kernel-2.6.32-220.17.1.el6.src.rpm

i386:
kernel-2.6.32-220.17.1.el6.i686.rpm
kernel-debug-2.6.32-220.17.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debug-devel-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-220.17.1.el6.i686.rpm
kernel-devel-2.6.32-220.17.1.el6.i686.rpm
kernel-headers-2.6.32-220.17.1.el6.i686.rpm
perf-2.6.32-220.17.1.el6.i686.rpm
perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-220.17.1.el6.noarch.rpm
kernel-firmware-2.6.32-220.17.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.17.1.el6.x86_64.rpm
kernel-devel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-headers-2.6.32-220.17.1.el6.x86_64.rpm
perf-2.6.32-220.17.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm

Red Hat Enterprise Linux Desktop Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/kernel-2.6.32-220.17.1.el6.src.rpm

i386:
kernel-debug-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-220.17.1.el6.i686.rpm
perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm
python-perf-2.6.32-220.17.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.17.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.17.1.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-2.6.32-220.17.1.el6.src.rpm

noarch:
kernel-doc-2.6.32-220.17.1.el6.noarch.rpm
kernel-firmware-2.6.32-220.17.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.17.1.el6.x86_64.rpm
kernel-devel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-headers-2.6.32-220.17.1.el6.x86_64.rpm
perf-2.6.32-220.17.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm

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

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/kernel-2.6.32-220.17.1.el6.src.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.17.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.17.1.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-2.6.32-220.17.1.el6.src.rpm

i386:
kernel-2.6.32-220.17.1.el6.i686.rpm
kernel-debug-2.6.32-220.17.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debug-devel-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-220.17.1.el6.i686.rpm
kernel-devel-2.6.32-220.17.1.el6.i686.rpm
kernel-headers-2.6.32-220.17.1.el6.i686.rpm
perf-2.6.32-220.17.1.el6.i686.rpm
perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-220.17.1.el6.noarch.rpm
kernel-firmware-2.6.32-220.17.1.el6.noarch.rpm

ppc64:
kernel-2.6.32-220.17.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-220.17.1.el6.ppc64.rpm
kernel-debug-2.6.32-220.17.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-220.17.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-220.17.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-220.17.1.el6.ppc64.rpm
kernel-devel-2.6.32-220.17.1.el6.ppc64.rpm
kernel-headers-2.6.32-220.17.1.el6.ppc64.rpm
perf-2.6.32-220.17.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-220.17.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.ppc64.rpm

s390x:
kernel-2.6.32-220.17.1.el6.s390x.rpm
kernel-debug-2.6.32-220.17.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-220.17.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-220.17.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-220.17.1.el6.s390x.rpm
kernel-devel-2.6.32-220.17.1.el6.s390x.rpm
kernel-headers-2.6.32-220.17.1.el6.s390x.rpm
kernel-kdump-2.6.32-220.17.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-220.17.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-220.17.1.el6.s390x.rpm
perf-2.6.32-220.17.1.el6.s390x.rpm
perf-debuginfo-2.6.32-220.17.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.s390x.rpm

x86_64:
kernel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.17.1.el6.x86_64.rpm
kernel-devel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-headers-2.6.32-220.17.1.el6.x86_64.rpm
perf-2.6.32-220.17.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/kernel-2.6.32-220.17.1.el6.src.rpm

i386:
kernel-debug-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-220.17.1.el6.i686.rpm
perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm
python-perf-2.6.32-220.17.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm

ppc64:
kernel-debug-debuginfo-2.6.32-220.17.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-220.17.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-220.17.1.el6.ppc64.rpm
python-perf-2.6.32-220.17.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.ppc64.rpm

s390x:
kernel-debug-debuginfo-2.6.32-220.17.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-220.17.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-220.17.1.el6.s390x.rpm
perf-debuginfo-2.6.32-220.17.1.el6.s390x.rpm
python-perf-2.6.32-220.17.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.s390x.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.17.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.17.1.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-2.6.32-220.17.1.el6.src.rpm

i386:
kernel-2.6.32-220.17.1.el6.i686.rpm
kernel-debug-2.6.32-220.17.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debug-devel-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-220.17.1.el6.i686.rpm
kernel-devel-2.6.32-220.17.1.el6.i686.rpm
kernel-headers-2.6.32-220.17.1.el6.i686.rpm
perf-2.6.32-220.17.1.el6.i686.rpm
perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-220.17.1.el6.noarch.rpm
kernel-firmware-2.6.32-220.17.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.17.1.el6.x86_64.rpm
kernel-devel-2.6.32-220.17.1.el6.x86_64.rpm
kernel-headers-2.6.32-220.17.1.el6.x86_64.rpm
perf-2.6.32-220.17.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/kernel-2.6.32-220.17.1.el6.src.rpm

i386:
kernel-debug-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-220.17.1.el6.i686.rpm
perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm
python-perf-2.6.32-220.17.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-220.17.1.el6.i686.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.17.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-2.6.32-220.17.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.17.1.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-2011-4086.html
https://www.redhat.com/security/data/cve/CVE-2012-1601.html
https://access.redhat.com/security/updates/classification/#moderate
https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.2_Technical_Notes/kernel.html#RHSA-2012-0571

8. Contact:

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

Copyright 2012 Red Hat, Inc.
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