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Red Hat Security Advisory 2013-0741-01

Red Hat Security Advisory 2013-0741-01
Posted Apr 16, 2013
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2013-0741-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. 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.

tags | advisory, kernel, local
systems | linux, redhat
advisories | CVE-2012-2133, CVE-2013-0871
MD5 | 8218e741c03aab3ebe1339676e240369

Red Hat Security Advisory 2013-0741-01

Change Mirror Download
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=====================================================================
Red Hat Security Advisory

Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2013:0741-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0741.html
Issue date: 2013-04-16
CVE Names: CVE-2012-2133 CVE-2013-0871
=====================================================================

1. Summary:

Updated kernel packages that fix two security issues and several bugs are
now available for Red Hat Enterprise Linux 6.2 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 Server EUS (v. 6.2) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 6.2) - i386, ppc64, s390x, 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 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)

* A use-after-free flaw was found in the Linux kernel's memory management
subsystem in the way quota handling for huge pages was performed. A local,
unprivileged user could use this flaw to cause a denial of service or,
potentially, escalate their privileges. (CVE-2012-2133, Moderate)

Red Hat would like to thank Shachar Raindel for reporting CVE-2012-2133.

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.

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/):

817430 - CVE-2012-2133 kernel: use after free bug in "quota" handling
911937 - CVE-2013-0871 kernel: race condition with PTRACE_SETREGS

6. Package List:

Red Hat Enterprise Linux Server EUS (v. 6.2):

Source:
kernel-2.6.32-220.34.1.el6.src.rpm

i386:
kernel-2.6.32-220.34.1.el6.i686.rpm
kernel-debug-2.6.32-220.34.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-220.34.1.el6.i686.rpm
kernel-debug-devel-2.6.32-220.34.1.el6.i686.rpm
kernel-debuginfo-2.6.32-220.34.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-220.34.1.el6.i686.rpm
kernel-devel-2.6.32-220.34.1.el6.i686.rpm
kernel-headers-2.6.32-220.34.1.el6.i686.rpm
perf-2.6.32-220.34.1.el6.i686.rpm
perf-debuginfo-2.6.32-220.34.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-220.34.1.el6.i686.rpm

noarch:
kernel-doc-2.6.32-220.34.1.el6.noarch.rpm
kernel-firmware-2.6.32-220.34.1.el6.noarch.rpm

ppc64:
kernel-2.6.32-220.34.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-220.34.1.el6.ppc64.rpm
kernel-debug-2.6.32-220.34.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-220.34.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-220.34.1.el6.ppc64.rpm
kernel-devel-2.6.32-220.34.1.el6.ppc64.rpm
kernel-headers-2.6.32-220.34.1.el6.ppc64.rpm
perf-2.6.32-220.34.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm

s390x:
kernel-2.6.32-220.34.1.el6.s390x.rpm
kernel-debug-2.6.32-220.34.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-220.34.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-220.34.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-220.34.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-220.34.1.el6.s390x.rpm
kernel-devel-2.6.32-220.34.1.el6.s390x.rpm
kernel-headers-2.6.32-220.34.1.el6.s390x.rpm
kernel-kdump-2.6.32-220.34.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-220.34.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-220.34.1.el6.s390x.rpm
perf-2.6.32-220.34.1.el6.s390x.rpm
perf-debuginfo-2.6.32-220.34.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-220.34.1.el6.s390x.rpm

x86_64:
kernel-2.6.32-220.34.1.el6.x86_64.rpm
kernel-debug-2.6.32-220.34.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-220.34.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-220.34.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.34.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.34.1.el6.x86_64.rpm
kernel-devel-2.6.32-220.34.1.el6.x86_64.rpm
kernel-headers-2.6.32-220.34.1.el6.x86_64.rpm
perf-2.6.32-220.34.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.34.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.34.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 6.2):

Source:
kernel-2.6.32-220.34.1.el6.src.rpm

i386:
kernel-debug-debuginfo-2.6.32-220.34.1.el6.i686.rpm
kernel-debuginfo-2.6.32-220.34.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-220.34.1.el6.i686.rpm
perf-debuginfo-2.6.32-220.34.1.el6.i686.rpm
python-perf-2.6.32-220.34.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-220.34.1.el6.i686.rpm

ppc64:
kernel-debug-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-220.34.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm
python-perf-2.6.32-220.34.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-220.34.1.el6.ppc64.rpm

s390x:
kernel-debug-debuginfo-2.6.32-220.34.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-220.34.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-220.34.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-220.34.1.el6.s390x.rpm
perf-debuginfo-2.6.32-220.34.1.el6.s390x.rpm
python-perf-2.6.32-220.34.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-220.34.1.el6.s390x.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-220.34.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-220.34.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-220.34.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-220.34.1.el6.x86_64.rpm
python-perf-2.6.32-220.34.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-220.34.1.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-2012-2133.html
https://www.redhat.com/security/data/cve/CVE-2013-0871.html
https://access.redhat.com/security/updates/classification/#important
https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.2_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.
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