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

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2015:0803-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2015-0803.html
Issue date:        2015-04-14
CVE Names:         CVE-2013-2596 CVE-2014-5471 CVE-2014-5472 
                   CVE-2014-8159 
=====================================================================

1. Summary:

Updated kernel packages that fix multiple security issues and two bugs are
now available for Red Hat Enterprise Linux 6.4 Advanced Update Support.

Red Hat Product Security 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 Server AUS (v. 6.4) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 6.4) - i386, ppc64, s390x, x86_64

3. Description:

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

* It was found that the Linux kernel's Infiniband subsystem did not
properly sanitize input parameters while registering memory regions from
user space via the (u)verbs API. A local user with access to a
/dev/infiniband/uverbsX device could use this flaw to crash the system or,
potentially, escalate their privileges on the system. (CVE-2014-8159,
Important)

* An integer overflow flaw was found in the way the Linux kernel's Frame
Buffer device implementation mapped kernel memory to user space via the
mmap syscall. A local user able to access a frame buffer device file
(/dev/fb*) could possibly use this flaw to escalate their privileges on the
system. (CVE-2013-2596, Important)

* It was found that the parse_rock_ridge_inode_internal() function of the
Linux kernel's ISOFS implementation did not correctly check relocated
directories when processing Rock Ridge child link (CL) tags. An attacker
with physical access to the system could use a specially crafted ISO image
to crash the system or, potentially, escalate their privileges on the
system. (CVE-2014-5471, CVE-2014-5472, Low)

Red Hat would like to thank Mellanox for reporting the CVE-2014-8159 issue.

This update also fixes the following bugs:

* The kernel could sometimes panic due to a possible division by zero in
the kernel scheduler. This bug has been fixed by defining a new div64_ul()
division function and correcting the affected calculation in the
proc_sched_show_task() function. (BZ#1199898)

* When repeating a Coordinated Universal Time (UTC) value during a leap
second (when the UTC time should be 23:59:60), the International Atomic
Time (TAI) timescale previously stopped as the kernel NTP code incremented
the TAI offset one second too late. A patch has been provided, which fixes
the bug by incrementing the offset during the leap second itself. Now, the
correct TAI is set during the leap second. (BZ#1201672)

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.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1034490 - CVE-2013-2596 kernel: integer overflow in fb_mmap
1134099 - CVE-2014-5471 CVE-2014-5472 kernel: isofs: unbound recursion when processing relocated directories
1181166 - CVE-2014-8159 kernel: infiniband: uverbs: unprotected physical memory access

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 6.4):

Source:
kernel-2.6.32-358.59.1.el6.src.rpm

i386:
kernel-2.6.32-358.59.1.el6.i686.rpm
kernel-debug-2.6.32-358.59.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-358.59.1.el6.i686.rpm
kernel-debug-devel-2.6.32-358.59.1.el6.i686.rpm
kernel-debuginfo-2.6.32-358.59.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-358.59.1.el6.i686.rpm
kernel-devel-2.6.32-358.59.1.el6.i686.rpm
kernel-headers-2.6.32-358.59.1.el6.i686.rpm
perf-2.6.32-358.59.1.el6.i686.rpm
perf-debuginfo-2.6.32-358.59.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-358.59.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-358.59.1.el6.noarch.rpm
kernel-firmware-2.6.32-358.59.1.el6.noarch.rpm

ppc64:
kernel-2.6.32-358.59.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-358.59.1.el6.ppc64.rpm
kernel-debug-2.6.32-358.59.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-358.59.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-358.59.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-358.59.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-358.59.1.el6.ppc64.rpm
kernel-devel-2.6.32-358.59.1.el6.ppc64.rpm
kernel-headers-2.6.32-358.59.1.el6.ppc64.rpm
perf-2.6.32-358.59.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-358.59.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-358.59.1.el6.ppc64.rpm

s390x:
kernel-2.6.32-358.59.1.el6.s390x.rpm
kernel-debug-2.6.32-358.59.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-358.59.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-358.59.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-358.59.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-358.59.1.el6.s390x.rpm
kernel-devel-2.6.32-358.59.1.el6.s390x.rpm
kernel-headers-2.6.32-358.59.1.el6.s390x.rpm
kernel-kdump-2.6.32-358.59.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-358.59.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-358.59.1.el6.s390x.rpm
perf-2.6.32-358.59.1.el6.s390x.rpm
perf-debuginfo-2.6.32-358.59.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-358.59.1.el6.s390x.rpm

x86_64:
kernel-2.6.32-358.59.1.el6.x86_64.rpm
kernel-debug-2.6.32-358.59.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-358.59.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-358.59.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-358.59.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-358.59.1.el6.x86_64.rpm
kernel-devel-2.6.32-358.59.1.el6.x86_64.rpm
kernel-headers-2.6.32-358.59.1.el6.x86_64.rpm
perf-2.6.32-358.59.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-358.59.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-358.59.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 6.4):

Source:
kernel-2.6.32-358.59.1.el6.src.rpm

i386:
kernel-debug-debuginfo-2.6.32-358.59.1.el6.i686.rpm
kernel-debuginfo-2.6.32-358.59.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-358.59.1.el6.i686.rpm
perf-debuginfo-2.6.32-358.59.1.el6.i686.rpm
python-perf-2.6.32-358.59.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-358.59.1.el6.i686.rpm

ppc64:
kernel-debug-debuginfo-2.6.32-358.59.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-358.59.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-358.59.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-358.59.1.el6.ppc64.rpm
python-perf-2.6.32-358.59.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-358.59.1.el6.ppc64.rpm

s390x:
kernel-debug-debuginfo-2.6.32-358.59.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-358.59.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-358.59.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-358.59.1.el6.s390x.rpm
perf-debuginfo-2.6.32-358.59.1.el6.s390x.rpm
python-perf-2.6.32-358.59.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-358.59.1.el6.s390x.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-358.59.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-358.59.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-358.59.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-358.59.1.el6.x86_64.rpm
python-perf-2.6.32-358.59.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-358.59.1.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/

7. References:

https://access.redhat.com/security/cve/CVE-2013-2596
https://access.redhat.com/security/cve/CVE-2014-5471
https://access.redhat.com/security/cve/CVE-2014-5472
https://access.redhat.com/security/cve/CVE-2014-8159
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 2015 Red Hat, Inc.
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