Articles / Red Hat: Security update fo…

Red Hat: Security update for Linux kernel

The kernel packages contain the Linux kernel, the core of any Linux operating system. A NULL pointer dereference flaw was found in the nf_ct_frag6_reasm() function in the netfilter IPv6 connection tracking implementation. A remote attacker could use this flaw to send specially-crafted packets to a target system that is using IPv6 and also has the nf_conntrack_ipv6 kernel module loaded, causing it to crash. A flaw was found in the way the key management facility handled replacement session keyrings on process forks. A local, unprivileged user could use this flaw to cause a denial of service.

Updated packages are available from ftp.redhat.com.

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

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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2012:1064-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-1064.html
Issue date:        2012-07-10
CVE Names:         CVE-2012-2744 CVE-2012-2745 
=====================================================================

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
important 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 NULL pointer dereference flaw was found in the nf_ct_frag6_reasm()
function in the Linux kernel's netfilter IPv6 connection tracking
implementation. A remote attacker could use this flaw to send
specially-crafted packets to a target system that is using IPv6 and also
has the nf_conntrack_ipv6 kernel module loaded, causing it to crash.
(CVE-2012-2744, Important)

* A flaw was found in the way the Linux kernel's key management facility
handled replacement session keyrings on process forks. A local,
unprivileged user could use this flaw to cause a denial of service.
(CVE-2012-2745, Moderate)

Red Hat would like to thank an anonymous contributor working with the
Beyond Security SecuriTeam Secure Disclosure program for reporting
CVE-2012-2744.

This update also fixes the following bugs:

* Previously introduced firmware files required for new Realtek chipsets
contained an invalid prefix ("rtl_nic_") in the file names, for example
"/lib/firmware/rtl_nic/rtl_nic_rtl8168d-1.fw". This update corrects these
file names. For example, the aforementioned file is now correctly named
"/lib/firmware/rtl_nic/rtl8168d-1.fw". (BZ#832359)

* This update blacklists the ADMA428M revision of the 2GB ATA Flash Disk
device. This is due to data corruption occurring on the said device when
the Ultra-DMA 66 transfer mode is used. When the
"libata.force=5:pio0,6:pio0" kernel parameter is set, the aforementioned
device works as expected. (BZ#832363)

* On Red Hat Enterprise Linux 6, mounting an NFS export from a server
running Windows Server 2012 Release Candidate returned the
NFS4ERR_MINOR_VERS_MISMATCH error because Windows Server 2012 Release
Candidate supports NFSv4.1 only. Red Hat Enterprise Linux 6 did not
properly handle the returned error and did not fall back to using NFSv3,
which caused the mount operation to fail. With this update, when the
NFS4ERR_MINOR_VERS_MISMATCH error is returned, the mount operation properly
falls back to using NFSv3 and no longer fails. (BZ#832365)

* On ext4 file systems, when fallocate() failed to allocate blocks due to
the ENOSPC condition (no space left on device) for a file larger than 4 GB,
the size of the file became corrupted and, consequently, caused file system
corruption. This was due to a missing cast operator in the
"ext4_fallocate()" function. With this update, the underlying source code
has been modified to address this issue, and file system corruption no
longer occurs. (BZ#833034)

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. 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/):

832365 - NFS mounts fail against Windows 8 servers [rhel-6.3.z]
833402 - CVE-2012-2744 kernel: netfilter: null pointer dereference in nf_ct_frag6_reasm()
833428 - CVE-2012-2745 kernel: cred: copy_process() should clear child->replacement_session_keyring

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/kernel-2.6.32-279.1.1.el6.src.rpm

i386:
kernel-2.6.32-279.1.1.el6.i686.rpm
kernel-debug-2.6.32-279.1.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debug-devel-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-279.1.1.el6.i686.rpm
kernel-devel-2.6.32-279.1.1.el6.i686.rpm
kernel-headers-2.6.32-279.1.1.el6.i686.rpm
perf-2.6.32-279.1.1.el6.i686.rpm
perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-279.1.1.el6.noarch.rpm
kernel-firmware-2.6.32-279.1.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.1.1.el6.x86_64.rpm
kernel-devel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-headers-2.6.32-279.1.1.el6.x86_64.rpm
perf-2.6.32-279.1.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.1.1.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-2.6.32-279.1.1.el6.src.rpm

i386:
kernel-debug-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-279.1.1.el6.i686.rpm
perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm
python-perf-2.6.32-279.1.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.1.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.1.1.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-2.6.32-279.1.1.el6.src.rpm

noarch:
kernel-doc-2.6.32-279.1.1.el6.noarch.rpm
kernel-firmware-2.6.32-279.1.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.1.1.el6.x86_64.rpm
kernel-devel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-headers-2.6.32-279.1.1.el6.x86_64.rpm
perf-2.6.32-279.1.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.1.1.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-2.6.32-279.1.1.el6.src.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.1.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.1.1.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-2.6.32-279.1.1.el6.src.rpm

i386:
kernel-2.6.32-279.1.1.el6.i686.rpm
kernel-debug-2.6.32-279.1.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debug-devel-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-279.1.1.el6.i686.rpm
kernel-devel-2.6.32-279.1.1.el6.i686.rpm
kernel-headers-2.6.32-279.1.1.el6.i686.rpm
perf-2.6.32-279.1.1.el6.i686.rpm
perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-279.1.1.el6.noarch.rpm
kernel-firmware-2.6.32-279.1.1.el6.noarch.rpm

ppc64:
kernel-2.6.32-279.1.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-279.1.1.el6.ppc64.rpm
kernel-debug-2.6.32-279.1.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-279.1.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-279.1.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-279.1.1.el6.ppc64.rpm
kernel-devel-2.6.32-279.1.1.el6.ppc64.rpm
kernel-headers-2.6.32-279.1.1.el6.ppc64.rpm
perf-2.6.32-279.1.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-279.1.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-279.1.1.el6.ppc64.rpm

s390x:
kernel-2.6.32-279.1.1.el6.s390x.rpm
kernel-debug-2.6.32-279.1.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-279.1.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-279.1.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-279.1.1.el6.s390x.rpm
kernel-devel-2.6.32-279.1.1.el6.s390x.rpm
kernel-headers-2.6.32-279.1.1.el6.s390x.rpm
kernel-kdump-2.6.32-279.1.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-279.1.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-279.1.1.el6.s390x.rpm
perf-2.6.32-279.1.1.el6.s390x.rpm
perf-debuginfo-2.6.32-279.1.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-279.1.1.el6.s390x.rpm

x86_64:
kernel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.1.1.el6.x86_64.rpm
kernel-devel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-headers-2.6.32-279.1.1.el6.x86_64.rpm
perf-2.6.32-279.1.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.1.1.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-2.6.32-279.1.1.el6.src.rpm

i386:
kernel-debug-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-279.1.1.el6.i686.rpm
perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm
python-perf-2.6.32-279.1.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm

ppc64:
kernel-debug-debuginfo-2.6.32-279.1.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-279.1.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-279.1.1.el6.ppc64.rpm
python-perf-2.6.32-279.1.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-279.1.1.el6.ppc64.rpm

s390x:
kernel-debug-debuginfo-2.6.32-279.1.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-279.1.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-279.1.1.el6.s390x.rpm
perf-debuginfo-2.6.32-279.1.1.el6.s390x.rpm
python-perf-2.6.32-279.1.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-279.1.1.el6.s390x.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.1.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.1.1.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-2.6.32-279.1.1.el6.src.rpm

i386:
kernel-2.6.32-279.1.1.el6.i686.rpm
kernel-debug-2.6.32-279.1.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debug-devel-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-279.1.1.el6.i686.rpm
kernel-devel-2.6.32-279.1.1.el6.i686.rpm
kernel-headers-2.6.32-279.1.1.el6.i686.rpm
perf-2.6.32-279.1.1.el6.i686.rpm
perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-279.1.1.el6.noarch.rpm
kernel-firmware-2.6.32-279.1.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.1.1.el6.x86_64.rpm
kernel-devel-2.6.32-279.1.1.el6.x86_64.rpm
kernel-headers-2.6.32-279.1.1.el6.x86_64.rpm
perf-2.6.32-279.1.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.1.1.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-2.6.32-279.1.1.el6.src.rpm

i386:
kernel-debug-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-279.1.1.el6.i686.rpm
perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm
python-perf-2.6.32-279.1.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-279.1.1.el6.i686.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.1.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-2.6.32-279.1.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.1.1.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-2012-2744.html
https://www.redhat.com/security/data/cve/CVE-2012-2745.html
https://access.redhat.com/security/updates/classification/#important

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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