[RHSA-2013:0621-01] Important: kernel security update

Mon Mar 11 19:52:08 UTC 2013

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

Synopsis:          Important: kernel security update
Advisory ID:       RHSA-2013:0621-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2013-0621.html
Issue date:        2013-03-11
CVE Names:         CVE-2013-0268 CVE-2013-0871 
=====================================================================

1. Summary:

Updated kernel packages that fix two security issues are now available 
for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team has rated this update as having 
important security impact. A Common Vulnerability Scoring System (CVSS) 
base score, which gives a detailed severity rating, is available from the 
CVE link in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, 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 flaw was found in the way file permission checks for the
"/dev/cpu/[x]/msr" files were performed in restricted root environments 
(for example, when using a capability-based security model). A local user 
with the ability to write to these files could use this flaw to escalate 
their privileges to kernel level, for example, by writing to the 
SYSENTER_EIP_MSR register. (CVE-2013-0268, Important)

* A race condition was found in the way the Linux kernel's ptrace
implementation handled PTRACE_SETREGS requests when the debuggee was woken
due to a SIGKILL signal instead of being stopped. A local, unprivileged
user could use this flaw to escalate their privileges. (CVE-2013-0871,
Important)

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/):

908693 - CVE-2013-0268 kernel: x86/msr: /dev/cpu/*/msr local privilege escalation
911937 - CVE-2013-0871 kernel: race condition with PTRACE_SETREGS

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/kernel-2.6.18-348.3.1.el5.src.rpm

i386:
kernel-2.6.18-348.3.1.el5.i686.rpm
kernel-PAE-2.6.18-348.3.1.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-348.3.1.el5.i686.rpm
kernel-PAE-devel-2.6.18-348.3.1.el5.i686.rpm
kernel-debug-2.6.18-348.3.1.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-348.3.1.el5.i686.rpm
kernel-debug-devel-2.6.18-348.3.1.el5.i686.rpm
kernel-debuginfo-2.6.18-348.3.1.el5.i686.rpm
kernel-debuginfo-common-2.6.18-348.3.1.el5.i686.rpm
kernel-devel-2.6.18-348.3.1.el5.i686.rpm
kernel-headers-2.6.18-348.3.1.el5.i386.rpm
kernel-xen-2.6.18-348.3.1.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-348.3.1.el5.i686.rpm
kernel-xen-devel-2.6.18-348.3.1.el5.i686.rpm

noarch:
kernel-doc-2.6.18-348.3.1.el5.noarch.rpm

x86_64:
kernel-2.6.18-348.3.1.el5.x86_64.rpm
kernel-debug-2.6.18-348.3.1.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-348.3.1.el5.x86_64.rpm
kernel-debug-devel-2.6.18-348.3.1.el5.x86_64.rpm
kernel-debuginfo-2.6.18-348.3.1.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-348.3.1.el5.x86_64.rpm
kernel-devel-2.6.18-348.3.1.el5.x86_64.rpm
kernel-headers-2.6.18-348.3.1.el5.x86_64.rpm
kernel-xen-2.6.18-348.3.1.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-348.3.1.el5.x86_64.rpm
kernel-xen-devel-2.6.18-348.3.1.el5.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/kernel-2.6.18-348.3.1.el5.src.rpm

i386:
kernel-2.6.18-348.3.1.el5.i686.rpm
kernel-PAE-2.6.18-348.3.1.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-348.3.1.el5.i686.rpm
kernel-PAE-devel-2.6.18-348.3.1.el5.i686.rpm
kernel-debug-2.6.18-348.3.1.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-348.3.1.el5.i686.rpm
kernel-debug-devel-2.6.18-348.3.1.el5.i686.rpm
kernel-debuginfo-2.6.18-348.3.1.el5.i686.rpm
kernel-debuginfo-common-2.6.18-348.3.1.el5.i686.rpm
kernel-devel-2.6.18-348.3.1.el5.i686.rpm
kernel-headers-2.6.18-348.3.1.el5.i386.rpm
kernel-xen-2.6.18-348.3.1.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-348.3.1.el5.i686.rpm
kernel-xen-devel-2.6.18-348.3.1.el5.i686.rpm

ia64:
kernel-2.6.18-348.3.1.el5.ia64.rpm
kernel-debug-2.6.18-348.3.1.el5.ia64.rpm
kernel-debug-debuginfo-2.6.18-348.3.1.el5.ia64.rpm
kernel-debug-devel-2.6.18-348.3.1.el5.ia64.rpm
kernel-debuginfo-2.6.18-348.3.1.el5.ia64.rpm
kernel-debuginfo-common-2.6.18-348.3.1.el5.ia64.rpm
kernel-devel-2.6.18-348.3.1.el5.ia64.rpm
kernel-headers-2.6.18-348.3.1.el5.ia64.rpm
kernel-xen-2.6.18-348.3.1.el5.ia64.rpm
kernel-xen-debuginfo-2.6.18-348.3.1.el5.ia64.rpm
kernel-xen-devel-2.6.18-348.3.1.el5.ia64.rpm

noarch:
kernel-doc-2.6.18-348.3.1.el5.noarch.rpm

ppc:
kernel-2.6.18-348.3.1.el5.ppc64.rpm
kernel-debug-2.6.18-348.3.1.el5.ppc64.rpm
kernel-debug-debuginfo-2.6.18-348.3.1.el5.ppc64.rpm
kernel-debug-devel-2.6.18-348.3.1.el5.ppc64.rpm
kernel-debuginfo-2.6.18-348.3.1.el5.ppc64.rpm
kernel-debuginfo-common-2.6.18-348.3.1.el5.ppc64.rpm
kernel-devel-2.6.18-348.3.1.el5.ppc64.rpm
kernel-headers-2.6.18-348.3.1.el5.ppc.rpm
kernel-headers-2.6.18-348.3.1.el5.ppc64.rpm
kernel-kdump-2.6.18-348.3.1.el5.ppc64.rpm
kernel-kdump-debuginfo-2.6.18-348.3.1.el5.ppc64.rpm
kernel-kdump-devel-2.6.18-348.3.1.el5.ppc64.rpm

s390x:
kernel-2.6.18-348.3.1.el5.s390x.rpm
kernel-debug-2.6.18-348.3.1.el5.s390x.rpm
kernel-debug-debuginfo-2.6.18-348.3.1.el5.s390x.rpm
kernel-debug-devel-2.6.18-348.3.1.el5.s390x.rpm
kernel-debuginfo-2.6.18-348.3.1.el5.s390x.rpm
kernel-debuginfo-common-2.6.18-348.3.1.el5.s390x.rpm
kernel-devel-2.6.18-348.3.1.el5.s390x.rpm
kernel-headers-2.6.18-348.3.1.el5.s390x.rpm
kernel-kdump-2.6.18-348.3.1.el5.s390x.rpm
kernel-kdump-debuginfo-2.6.18-348.3.1.el5.s390x.rpm
kernel-kdump-devel-2.6.18-348.3.1.el5.s390x.rpm

x86_64:
kernel-2.6.18-348.3.1.el5.x86_64.rpm
kernel-debug-2.6.18-348.3.1.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-348.3.1.el5.x86_64.rpm
kernel-debug-devel-2.6.18-348.3.1.el5.x86_64.rpm
kernel-debuginfo-2.6.18-348.3.1.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-348.3.1.el5.x86_64.rpm
kernel-devel-2.6.18-348.3.1.el5.x86_64.rpm
kernel-headers-2.6.18-348.3.1.el5.x86_64.rpm
kernel-xen-2.6.18-348.3.1.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-348.3.1.el5.x86_64.rpm
kernel-xen-devel-2.6.18-348.3.1.el5.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-2013-0268.html
https://www.redhat.com/security/data/cve/CVE-2013-0871.html
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert at redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2013 Red Hat, Inc.
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