Home / mailings [RHSA-2013:1783-01] Important: kernel security and bug fix update
Posted on 05 December 2013
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Red Hat Security Advisory
Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2013:1783-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-1783.html
Issue date: 2013-12-05
CVE Names: CVE-2012-4508 CVE-2013-2851 CVE-2013-4299
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1. Summary:
Updated kernel packages that fix three security issues and several bugs are
now available for Red Hat Enterprise Linux 6.3 Extended Update Support.
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 Compute Node EUS (v. 6.3) - noarch, x86_64
Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.3) - x86_64
Red Hat Enterprise Linux Server EUS (v. 6.3) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 6.3) - i386, ppc64, s390x, x86_64
3. Description:
The kernel packages contain the Linux kernel, the core of any Linux
operating system.
* A race condition was found in the way asynchronous I/O and fallocate()
interacted when using the ext4 file system. A local, unprivileged user
could use this flaw to expose random data from an extent whose data blocks
have not yet been written, and thus contain data from a deleted file.
(CVE-2012-4508, Important)
* An information leak flaw was found in the way the Linux kernel's device
mapper subsystem, under certain conditions, interpreted data written to
snapshot block devices. An attacker could use this flaw to read data from
disk blocks in free space, which are normally inaccessible. (CVE-2013-4299,
Moderate)
* A format string flaw was found in the Linux kernel's block layer.
A privileged, local user could potentially use this flaw to escalate their
privileges to kernel level (ring0). (CVE-2013-2851, Low)
Red Hat would like to thank Theodore Ts'o for reporting CVE-2012-4508,
Fujitsu for reporting CVE-2013-4299, and Kees Cook for reporting
CVE-2013-2851. Upstream acknowledges Dmitry Monakhov as the original
reporter of CVE-2012-4508.
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.
All kernel users are advised to 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/site/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 (https://bugzilla.redhat.com/):
869904 - CVE-2012-4508 kernel: ext4: AIO vs fallocate stale data exposure
969515 - CVE-2013-2851 kernel: block: passing disk names as format strings
1004233 - CVE-2013-4299 kernel: dm: dm-snapshot data leak
6. Package List:
Red Hat Enterprise Linux Compute Node EUS (v. 6.3):
Source:
kernel-2.6.32-279.39.1.el6.src.rpm
noarch:
kernel-doc-2.6.32-279.39.1.el6.noarch.rpm
kernel-firmware-2.6.32-279.39.1.el6.noarch.rpm
x86_64:
kernel-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debug-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.39.1.el6.x86_64.rpm
kernel-devel-2.6.32-279.39.1.el6.x86_64.rpm
kernel-headers-2.6.32-279.39.1.el6.x86_64.rpm
perf-2.6.32-279.39.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.3) :
Source:
kernel-2.6.32-279.39.1.el6.src.rpm
x86_64:
kernel-debug-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.39.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
python-perf-2.6.32-279.39.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server EUS (v. 6.3):
Source:
kernel-2.6.32-279.39.1.el6.src.rpm
i386:
kernel-2.6.32-279.39.1.el6.i686.rpm
kernel-debug-2.6.32-279.39.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-279.39.1.el6.i686.rpm
kernel-debug-devel-2.6.32-279.39.1.el6.i686.rpm
kernel-debuginfo-2.6.32-279.39.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-279.39.1.el6.i686.rpm
kernel-devel-2.6.32-279.39.1.el6.i686.rpm
kernel-headers-2.6.32-279.39.1.el6.i686.rpm
perf-2.6.32-279.39.1.el6.i686.rpm
perf-debuginfo-2.6.32-279.39.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-279.39.1.el6.i686.rpm
noarch:
kernel-doc-2.6.32-279.39.1.el6.noarch.rpm
kernel-firmware-2.6.32-279.39.1.el6.noarch.rpm
ppc64:
kernel-2.6.32-279.39.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-279.39.1.el6.ppc64.rpm
kernel-debug-2.6.32-279.39.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-279.39.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-279.39.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-279.39.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-279.39.1.el6.ppc64.rpm
kernel-devel-2.6.32-279.39.1.el6.ppc64.rpm
kernel-headers-2.6.32-279.39.1.el6.ppc64.rpm
perf-2.6.32-279.39.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-279.39.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-279.39.1.el6.ppc64.rpm
s390x:
kernel-2.6.32-279.39.1.el6.s390x.rpm
kernel-debug-2.6.32-279.39.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-279.39.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-279.39.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-279.39.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-279.39.1.el6.s390x.rpm
kernel-devel-2.6.32-279.39.1.el6.s390x.rpm
kernel-headers-2.6.32-279.39.1.el6.s390x.rpm
kernel-kdump-2.6.32-279.39.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-279.39.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-279.39.1.el6.s390x.rpm
perf-2.6.32-279.39.1.el6.s390x.rpm
perf-debuginfo-2.6.32-279.39.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-279.39.1.el6.s390x.rpm
x86_64:
kernel-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debug-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.39.1.el6.x86_64.rpm
kernel-devel-2.6.32-279.39.1.el6.x86_64.rpm
kernel-headers-2.6.32-279.39.1.el6.x86_64.rpm
perf-2.6.32-279.39.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional EUS (v. 6.3):
Source:
kernel-2.6.32-279.39.1.el6.src.rpm
i386:
kernel-debug-debuginfo-2.6.32-279.39.1.el6.i686.rpm
kernel-debuginfo-2.6.32-279.39.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-279.39.1.el6.i686.rpm
perf-debuginfo-2.6.32-279.39.1.el6.i686.rpm
python-perf-2.6.32-279.39.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-279.39.1.el6.i686.rpm
ppc64:
kernel-debug-debuginfo-2.6.32-279.39.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-279.39.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-279.39.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-279.39.1.el6.ppc64.rpm
python-perf-2.6.32-279.39.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-279.39.1.el6.ppc64.rpm
s390x:
kernel-debug-debuginfo-2.6.32-279.39.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-279.39.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-279.39.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-279.39.1.el6.s390x.rpm
perf-debuginfo-2.6.32-279.39.1.el6.s390x.rpm
python-perf-2.6.32-279.39.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-279.39.1.el6.s390x.rpm
x86_64:
kernel-debug-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-279.39.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-279.39.1.el6.x86_64.rpm
python-perf-2.6.32-279.39.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-279.39.1.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-2012-4508.html
https://www.redhat.com/security/data/cve/CVE-2013-2851.html
https://www.redhat.com/security/data/cve/CVE-2013-4299.html
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.3_Technical_Notes/kernel.html
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2013 Red Hat, Inc.
