Ranjivosti jezgre operacijskog sustava

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by ncert - 18. srpnja 2014.18. srpnja 2014.0

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Red Hat Security Advisory

Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2014:0900-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0900.html
Issue date: 2014-07-17
CVE Names: CVE-2014-1737 CVE-2014-1738 CVE-2014-3153
=====================================================================

1. Summary:

Updated kernel packages that fix three security issues and one bug are now
available for Red Hat Enterprise Linux 6.4 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 Optional EUS (v. 6.4) – x86_64
Red Hat Enterprise Linux HPC Node EUS (v. 6.4) – noarch, x86_64
Red Hat Enterprise Linux Server EUS (v. 6.4) – i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 6.4) – i386, ppc64, s390x, x86_64

3. Description:

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 futex subsystem handled
the requeuing of certain Priority Inheritance (PI) futexes. A local,
unprivileged user could use this flaw to escalate their privileges on the
system. (CVE-2014-3153, Important)

* A flaw was found in the way the Linux kernel’s floppy driver handled user
space provided data in certain error code paths while processing FDRAWCMD
IOCTL commands. A local user with write access to /dev/fdX could use this
flaw to free (using the kfree() function) arbitrary kernel memory.
(CVE-2014-1737, Important)

* It was found that the Linux kernel’s floppy driver leaked internal kernel
memory addresses to user space during the processing of the FDRAWCMD IOCTL
command. A local user with write access to /dev/fdX could use this flaw to
obtain information about the kernel heap arrangement. (CVE-2014-1738, Low)

Note: A local user with write access to /dev/fdX could use these two flaws
(CVE-2014-1737 in combination with CVE-2014-1738) to escalate their
privileges on the system.

Red Hat would like to thank Kees Cook of Google for reporting
CVE-2014-3153, and Matthew Daley for reporting CVE-2014-1737 and
CVE-2014-1738. Google acknowledges Pinkie Pie as the original reporter of
CVE-2014-3153.

This update also fixes the following bug:

* A previous change that introduced global clock updates caused guest
machines to boot slowly when the host Time Stamp Counter (TSC) was marked
as unstable. The slow down increased with the number of vCPUs allocated.
To resolve this problem, a patch has been applied to limit the rate of the
global clock updates. (BZ#1102253)

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/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/):

1094299 – CVE-2014-1737 CVE-2014-1738 kernel: block: floppy: privilege escalation via FDRAWCMD floppy ioctl command
1103626 – CVE-2014-3153 kernel: futex: pi futexes requeue issue

6. Package List:

Red Hat Enterprise Linux HPC Node EUS (v. 6.4):

Source:
kernel-2.6.32-358.46.1.el6.src.rpm

noarch:
kernel-doc-2.6.32-358.46.1.el6.noarch.rpm
kernel-firmware-2.6.32-358.46.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-358.46.1.el6.x86_64.rpm
kernel-debug-2.6.32-358.46.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-358.46.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-358.46.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-358.46.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-358.46.1.el6.x86_64.rpm
kernel-devel-2.6.32-358.46.1.el6.x86_64.rpm
kernel-headers-2.6.32-358.46.1.el6.x86_64.rpm
perf-2.6.32-358.46.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-358.46.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-358.46.1.el6.x86_64.rpm

Red Hat Enterprise Linux Compute Node Optional EUS (v. 6.4):

Source:
kernel-2.6.32-358.46.1.el6.src.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-358.46.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-358.46.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-358.46.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-358.46.1.el6.x86_64.rpm
python-perf-2.6.32-358.46.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-358.46.1.el6.x86_64.rpm

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

Source:
kernel-2.6.32-358.46.1.el6.src.rpm

i386:
kernel-2.6.32-358.46.1.el6.i686.rpm
kernel-debug-2.6.32-358.46.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-358.46.1.el6.i686.rpm
kernel-debug-devel-2.6.32-358.46.1.el6.i686.rpm
kernel-debuginfo-2.6.32-358.46.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-358.46.1.el6.i686.rpm
kernel-devel-2.6.32-358.46.1.el6.i686.rpm
kernel-headers-2.6.32-358.46.1.el6.i686.rpm
perf-2.6.32-358.46.1.el6.i686.rpm
perf-debuginfo-2.6.32-358.46.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-358.46.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-358.46.1.el6.noarch.rpm
kernel-firmware-2.6.32-358.46.1.el6.noarch.rpm

ppc64:
kernel-2.6.32-358.46.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-358.46.1.el6.ppc64.rpm
kernel-debug-2.6.32-358.46.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-358.46.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-358.46.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-358.46.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-358.46.1.el6.ppc64.rpm
kernel-devel-2.6.32-358.46.1.el6.ppc64.rpm
kernel-headers-2.6.32-358.46.1.el6.ppc64.rpm
perf-2.6.32-358.46.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-358.46.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-358.46.1.el6.ppc64.rpm

s390x:
kernel-2.6.32-358.46.1.el6.s390x.rpm
kernel-debug-2.6.32-358.46.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-358.46.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-358.46.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-358.46.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-358.46.1.el6.s390x.rpm
kernel-devel-2.6.32-358.46.1.el6.s390x.rpm
kernel-headers-2.6.32-358.46.1.el6.s390x.rpm
kernel-kdump-2.6.32-358.46.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-358.46.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-358.46.1.el6.s390x.rpm
perf-2.6.32-358.46.1.el6.s390x.rpm
perf-debuginfo-2.6.32-358.46.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-358.46.1.el6.s390x.rpm

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

Source:
kernel-2.6.32-358.46.1.el6.src.rpm

i386:
kernel-debug-debuginfo-2.6.32-358.46.1.el6.i686.rpm
kernel-debuginfo-2.6.32-358.46.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-358.46.1.el6.i686.rpm
perf-debuginfo-2.6.32-358.46.1.el6.i686.rpm
python-perf-2.6.32-358.46.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-358.46.1.el6.i686.rpm

ppc64:
kernel-debug-debuginfo-2.6.32-358.46.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-358.46.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-358.46.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-358.46.1.el6.ppc64.rpm
python-perf-2.6.32-358.46.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-358.46.1.el6.ppc64.rpm

s390x:
kernel-debug-debuginfo-2.6.32-358.46.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-358.46.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-358.46.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-358.46.1.el6.s390x.rpm
perf-debuginfo-2.6.32-358.46.1.el6.s390x.rpm
python-perf-2.6.32-358.46.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-358.46.1.el6.s390x.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-2014-1737.html
https://www.redhat.com/security/data/cve/CVE-2014-1738.html
https://www.redhat.com/security/data/cve/CVE-2014-3153.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/

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