Synopsis

Important: kernel-rt security and bug fix update

Type/Severity

Security Advisory: Important

Topic

Updated kernel-rt packages that fix multiple security issues and one bug
are now available for Red Hat Enterprise MRG 2.5.

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.

Description

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

• A NULL pointer dereference flaw was found in the way the Linux kernel's
  Stream Control Transmission Protocol (SCTP) implementation handled
  simultaneous connections between the same hosts. A remote attacker could
  use this flaw to crash the system. (CVE-2014-5077, Important)
  
• Multiple use-after-free flaws and an integer overflow flaw were found in
  the way the Linux kernel's Advanced Linux Sound Architecture (ALSA)
  implementation handled user controls. A local, privileged user could use
  either of these flaws to crash the system. (CVE-2014-4653, CVE-2014-4654,
  CVE-2014-4655, CVE-2014-4656, Moderate)
  
• An information leak flaw was found in the way the Linux kernel's Advanced
  Linux Sound Architecture (ALSA) implementation handled access of the user
  control's state. A local, privileged user could use this flaw to leak
  kernel memory to user space. (CVE-2014-4652, Low)
  

This update also fixes the following bug:

• Prior to this update, the netconsole module was unavailable on MRG
  Realtime kernels due to locking issues that disabled it. These locking
  issues have been corrected, allowing the netconsole module to be re-enabled
  and functional on Realtime kernels. (BZ#1088923)
  

Users are advised to upgrade to these updated packages, which upgrade the
kernel-rt kernel to version kernel-rt-3.10.33-rt32.45 and correct these
issues. The system must be rebooted for this update to take effect.

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/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.

Affected Products

• MRG Realtime 2 x86_64

Fixes

• BZ - 1113406 - CVE-2014-4652 Kernel: ALSA: control: protect user controls against races & memory disclosure
• BZ - 1113409 - CVE-2014-4653 Kernel: ALSA: control: do not access controls outside of protected regions
• BZ - 1113445 - CVE-2014-4654 CVE-2014-4655 Kernel: ALSA: control: use-after-free in replacing user controls
• BZ - 1113470 - CVE-2014-4656 Kernel: ALSA: control: integer overflow in id.index & id.numid
• BZ - 1122982 - CVE-2014-5077 Kernel: net: SCTP: fix a NULL pointer dereference during INIT collisions

CVEs

• CVE-2014-4655
• CVE-2014-4654
• CVE-2014-4656
• CVE-2014-5077
• CVE-2014-4653
• CVE-2014-4652

References

• https://access.redhat.com/security/updates/classification/#important

MRG Realtime 2

SRPM
kernel-rt-3.10.33-rt32.45.el6rt.src.rpm	SHA-256: e2f3083db5768b0e45015610d0a9f67646a52be815beedd106b509f4436d060f
x86_64
kernel-rt-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: a780fdcd66cbbff9533436a0ae0152c666fabc7f47164f46018aad2aa8d73272
kernel-rt-debug-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: 709731cd530784b6e6556c23445f9b8a48de2e7d3c74a3130396a3d2c631b593
kernel-rt-debug-debuginfo-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: 9cb66076b98b80d207fecedb6c0c34990365c6348dde93e4d983ab4b62c6b0fa
kernel-rt-debug-devel-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: 93a785e0adcd3feb9989cba7baeabb181806a83d30d8358021e82740381693bb
kernel-rt-debuginfo-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: 4b89106e79b75827fee679b343921e1d8f80c80a8852a851daf09b3889d0e127
kernel-rt-debuginfo-common-x86_64-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: a0ae007c34f60eecc2835fc05aea6da77fb3b7e51bce5486608877e3b7dfd915
kernel-rt-devel-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: 2e18deeae01a6fe4b56c899119ba01da1b1e002c56c21311bd11b19b116021f2
kernel-rt-doc-3.10.33-rt32.45.el6rt.noarch.rpm	SHA-256: 00e6f0362233b02cf6f85007136cfc4c1a003c399a11a17e2573c18473b2b52f
kernel-rt-firmware-3.10.33-rt32.45.el6rt.noarch.rpm	SHA-256: a5b13837a0ec30ffc98ab9b0ad0d8b2068e06f75fafe72be260d10a9f39f2a66
kernel-rt-trace-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: c603286238eaf2cdddd8ce89825f6b333d9371635960c5ad8e65d8ae164c00f1
kernel-rt-trace-debuginfo-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: f5b9eea9b379e90574d1a301101f0dbfe558a869d136fd7f12ccf7985f8f42c5
kernel-rt-trace-devel-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: 7a69b06f276c726e578bf31e76f614d57d21b47482941ba3c98aded4b2db6d57
kernel-rt-vanilla-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: 26b03e5a1596b015db4d52464adfb9f5e25d7ae2098d21423d3c8d4ee48888ad
kernel-rt-vanilla-debuginfo-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: 0549b9b1ecf2a24e4dc28aa63b45a8bfbfb6b7a5ec74a614f1e0309b8ea82933
kernel-rt-vanilla-devel-3.10.33-rt32.45.el6rt.x86_64.rpm	SHA-256: ca8bf1b0293463f5eeb2312849997e969517708f7f65f4e4e0f47f479342b129