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Hash: SHA1

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

Synopsis:          Important: kernel security and enhancement update
Advisory ID:       RHSA-2016:2128-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2016:2128.html
Issue date:        2016-10-31
CVE Names:         CVE-2016-4470 CVE-2016-5195 
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 6.6
Extended Update Support.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux HPC Node EUS (v. 6.6) - noarch, x86_64
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6) - x86_64
Red Hat Enterprise Linux Server EUS (v. 6.6) - i386, noarch, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 6.6) - i386, ppc64, s390x, x86_64

3. Description:

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

Security Fix(es):

* A flaw was found in the Linux kernel's keyring handling code: the
key_reject_and_link() function could be forced to free an arbitrary memory
block. An attacker could use this flaw to trigger a use-after-free
condition on the system, potentially allowing for privilege escalation.
(CVE-2016-4470, Important)

* A race condition was found in the way the Linux kernel's memory subsystem
handled the copy-on-write (COW) breakage of private read-only memory
mappings. An unprivileged, local user could use this flaw to gain write
access to otherwise read-only memory mappings and thus increase their
privileges on the system. (CVE-2016-5195, Important)

Red Hat would like to thank Phil Oester for reporting CVE-2016-5195. The
CVE-2016-4470 issue was discovered by David Howells (Red Hat).

Enhancement(s):

* This update fixes a tape write problem by fixing the use of the
sas_is_tlr_enabled API in the mpt3sas driver. The driver now checks whether
Transport Layer Recovery (TLR) is enabled before enabling the
MPI2_SCSIIO_CONTROL_TLR_ON flag. (BZ#1372352)

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

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

The system must be rebooted for this update to take effect.

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

1341716 - CVE-2016-4470 kernel: Uninitialized variable in request_key handling causes kernel crash in error handling path
1384344 - CVE-2016-5195 kernel: mm: privilege escalation via MAP_PRIVATE COW breakage

6. Package List:

Red Hat Enterprise Linux HPC Node EUS (v. 6.6):

Source:
kernel-2.6.32-504.54.1.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-504.54.1.el6.noarch.rpm
kernel-doc-2.6.32-504.54.1.el6.noarch.rpm
kernel-firmware-2.6.32-504.54.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debug-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-504.54.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-504.54.1.el6.i686.rpm
kernel-debug-devel-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.i686.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-504.54.1.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.54.1.el6.x86_64.rpm
kernel-devel-2.6.32-504.54.1.el6.x86_64.rpm
kernel-headers-2.6.32-504.54.1.el6.x86_64.rpm
perf-2.6.32-504.54.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.54.1.el6.i686.rpm
perf-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.54.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6):

x86_64:
kernel-debug-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.54.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
python-perf-2.6.32-504.54.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 6.6):

Source:
kernel-2.6.32-504.54.1.el6.src.rpm

i386:
kernel-2.6.32-504.54.1.el6.i686.rpm
kernel-debug-2.6.32-504.54.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-504.54.1.el6.i686.rpm
kernel-debug-devel-2.6.32-504.54.1.el6.i686.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-504.54.1.el6.i686.rpm
kernel-devel-2.6.32-504.54.1.el6.i686.rpm
kernel-headers-2.6.32-504.54.1.el6.i686.rpm
perf-2.6.32-504.54.1.el6.i686.rpm
perf-debuginfo-2.6.32-504.54.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-504.54.1.el6.i686.rpm

noarch:
kernel-abi-whitelists-2.6.32-504.54.1.el6.noarch.rpm
kernel-doc-2.6.32-504.54.1.el6.noarch.rpm
kernel-firmware-2.6.32-504.54.1.el6.noarch.rpm

ppc64:
kernel-2.6.32-504.54.1.el6.ppc64.rpm
kernel-bootwrapper-2.6.32-504.54.1.el6.ppc64.rpm
kernel-debug-2.6.32-504.54.1.el6.ppc64.rpm
kernel-debug-debuginfo-2.6.32-504.54.1.el6.ppc64.rpm
kernel-debug-devel-2.6.32-504.54.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-504.54.1.el6.ppc64.rpm
kernel-devel-2.6.32-504.54.1.el6.ppc64.rpm
kernel-headers-2.6.32-504.54.1.el6.ppc64.rpm
perf-2.6.32-504.54.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-504.54.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-504.54.1.el6.ppc64.rpm

s390x:
kernel-2.6.32-504.54.1.el6.s390x.rpm
kernel-debug-2.6.32-504.54.1.el6.s390x.rpm
kernel-debug-debuginfo-2.6.32-504.54.1.el6.s390x.rpm
kernel-debug-devel-2.6.32-504.54.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-504.54.1.el6.s390x.rpm
kernel-devel-2.6.32-504.54.1.el6.s390x.rpm
kernel-headers-2.6.32-504.54.1.el6.s390x.rpm
kernel-kdump-2.6.32-504.54.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-504.54.1.el6.s390x.rpm
kernel-kdump-devel-2.6.32-504.54.1.el6.s390x.rpm
perf-2.6.32-504.54.1.el6.s390x.rpm
perf-debuginfo-2.6.32-504.54.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-504.54.1.el6.s390x.rpm

x86_64:
kernel-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debug-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-504.54.1.el6.i686.rpm
kernel-debug-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-504.54.1.el6.i686.rpm
kernel-debug-devel-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.i686.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debuginfo-common-i686-2.6.32-504.54.1.el6.i686.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.54.1.el6.x86_64.rpm
kernel-devel-2.6.32-504.54.1.el6.x86_64.rpm
kernel-headers-2.6.32-504.54.1.el6.x86_64.rpm
perf-2.6.32-504.54.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.54.1.el6.i686.rpm
perf-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.54.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 6.6):

i386:
kernel-debug-debuginfo-2.6.32-504.54.1.el6.i686.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.i686.rpm
kernel-debuginfo-common-i686-2.6.32-504.54.1.el6.i686.rpm
perf-debuginfo-2.6.32-504.54.1.el6.i686.rpm
python-perf-2.6.32-504.54.1.el6.i686.rpm
python-perf-debuginfo-2.6.32-504.54.1.el6.i686.rpm

ppc64:
kernel-debug-debuginfo-2.6.32-504.54.1.el6.ppc64.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.ppc64.rpm
kernel-debuginfo-common-ppc64-2.6.32-504.54.1.el6.ppc64.rpm
perf-debuginfo-2.6.32-504.54.1.el6.ppc64.rpm
python-perf-2.6.32-504.54.1.el6.ppc64.rpm
python-perf-debuginfo-2.6.32-504.54.1.el6.ppc64.rpm

s390x:
kernel-debug-debuginfo-2.6.32-504.54.1.el6.s390x.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.s390x.rpm
kernel-debuginfo-common-s390x-2.6.32-504.54.1.el6.s390x.rpm
kernel-kdump-debuginfo-2.6.32-504.54.1.el6.s390x.rpm
perf-debuginfo-2.6.32-504.54.1.el6.s390x.rpm
python-perf-2.6.32-504.54.1.el6.s390x.rpm
python-perf-debuginfo-2.6.32-504.54.1.el6.s390x.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-504.54.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
python-perf-2.6.32-504.54.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-504.54.1.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-2016-4470
https://access.redhat.com/security/cve/CVE-2016-5195
https://access.redhat.com/security/updates/classification#important
https://access.redhat.com/security/vulnerabilities/DirtyCow

8. Contact:

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

Copyright 2016 Red Hat, Inc.
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Red Hat 6.6 RHSA-2016:2128-01 Important: Kernel Privilege Escalation

red hat

October 31, 2016

An update for kernel is now available for Red Hat Enterprise Linux 6.6 Extended Update Support

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

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

The system must be rebooted for this update to take effect.

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
* A flaw was found in the Linux kernel's keyring handling code: the key_reject_and_link() function could be forced to free an arbitrary memory block. An attacker could use this flaw to trigger a use-after-free condition on the system, potentially allowing for privilege escalation. (CVE-2016-4470, Important)
* A race condition was found in the way the Linux kernel's memory subsystem handled the copy-on-write (COW) breakage of private read-only memory mappings. An unprivileged, local user could use this flaw to gain write access to otherwise read-only memory mappings and thus increase their privileges on the system. (CVE-2016-5195, Important)
Red Hat would like to thank Phil Oester for reporting CVE-2016-5195. The CVE-2016-4470 issue was discovered by David Howells (Red Hat).
Enhancement(s):
* This update fixes a tape write problem by fixing the use of the sas_is_tlr_enabled API in the mpt3sas driver. The driver now checks whether Transport Layer Recovery (TLR) is enabled before enabling the MPI2_SCSIIO_CONTROL_TLR_ON flag. (BZ#1372352)

Topics Covered

security advisory kernel update privilege escalation system enhancement Red Hat Enterprise Linux

References

https://access.redhat.com/security/cve/CVE-2016-4470 https://access.redhat.com/security/cve/CVE-2016-5195 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/security/vulnerabilities/DirtyCow

Package List

Red Hat Enterprise Linux HPC Node EUS (v. 6.6):
Source: kernel-2.6.32-504.54.1.el6.src.rpm
noarch: kernel-abi-whitelists-2.6.32-504.54.1.el6.noarch.rpm kernel-doc-2.6.32-504.54.1.el6.noarch.rpm kernel-firmware-2.6.32-504.54.1.el6.noarch.rpm
x86_64: kernel-2.6.32-504.54.1.el6.x86_64.rpm kernel-debug-2.6.32-504.54.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-504.54.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-504.54.1.el6.i686.rpm kernel-debug-devel-2.6.32-504.54.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.54.1.el6.i686.rpm kernel-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-504.54.1.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-504.54.1.el6.x86_64.rpm kernel-devel-2.6.32-504.54.1.el6.x86_64.rpm kernel-headers-2.6.32-504.54.1.el6.x86_64.rpm perf-2.6.32-504.54.1.el6.x86_64.rpm perf-debuginfo-2.6.32-504.54.1.el6.i686.rpm perf-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-504.54.1.el6.i686.rpm python-perf-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6):
x86_64: kernel-debug-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-504.54.1.el6.x86_64.rpm

Read the Full Advisory

Severity

important

Lowest

Low

Medium

High

Critical

Advisory ID: RHSA-2016:2128-01

Product: Red Hat Enterprise Linux

Advisory URL: https://access.redhat.com/errata/RHSA-2016:2128.html

Issue date: 2016-10-31

Topic

An update for kernel is now available for Red Hat Enterprise Linux 6.6Extended Update Support.Red Hat Product Security has rated this update as having a security impactof Important. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available for each vulnerabilityfrom the CVE link(s) in the References section.

Topics Covered

security advisory kernel update privilege escalation system enhancement Red Hat Enterprise Linux

Relevant Releases Architectures

Red Hat Enterprise Linux HPC Node EUS (v. 6.6) - noarch, x86_64

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.6) - x86_64

Red Hat Enterprise Linux Server EUS (v. 6.6) - i386, noarch, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 6.6) - i386, ppc64, s390x, x86_64

Bugs Fixed

1341716 - CVE-2016-4470 kernel: Uninitialized variable in request_key handling causes kernel crash in error handling path

1384344 - CVE-2016-5195 kernel: mm: privilege escalation via MAP_PRIVATE COW breakage

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