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Red Hat 6.5: RHSA-2016:2120-01 Important Kernel Privilege Escalation

Redhat Large Esm H500
An update for kernel is now available for Red Hat Enterprise Linux 6.5 Advanced Update Support and Red Hat Enterprise Linux 6.5 Telco Extended Update Support. Red Hat Product Security has rated this update as having a security impact
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====================================================================                   Red Hat Security Advisory

Synopsis:          Important: kernel security update
Advisory ID:       RHSA-2016:2120-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2016:2120.html
Issue date:        2016-10-27
CVE Names:         CVE-2016-5195 
====================================================================
1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 6.5
Advanced Update Support and Red Hat Enterprise Linux 6.5 Telco 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 Server AUS (v. 6.5) - noarch, x86_64
Red Hat Enterprise Linux Server Optional AUS (v. 6.5) - x86_64
Red Hat Enterprise Linux Server Optional TUS (v. 6.5) - x86_64
Red Hat Enterprise Linux Server TUS (v. 6.5) - noarch, x86_64

3. Description:

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

Security Fix(es):

* 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 this issue.

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/):

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

6. Package List:

Red Hat Enterprise Linux Server AUS (v. 6.5):

Source:
kernel-2.6.32-431.75.1.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-431.75.1.el6.noarch.rpm
kernel-doc-2.6.32-431.75.1.el6.noarch.rpm
kernel-firmware-2.6.32-431.75.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debug-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-431.75.1.el6.x86_64.rpm
kernel-devel-2.6.32-431.75.1.el6.x86_64.rpm
kernel-headers-2.6.32-431.75.1.el6.x86_64.rpm
perf-2.6.32-431.75.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server TUS (v. 6.5):

Source:
kernel-2.6.32-431.75.1.el6.src.rpm

noarch:
kernel-abi-whitelists-2.6.32-431.75.1.el6.noarch.rpm
kernel-doc-2.6.32-431.75.1.el6.noarch.rpm
kernel-firmware-2.6.32-431.75.1.el6.noarch.rpm

x86_64:
kernel-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debug-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debug-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debug-devel-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-431.75.1.el6.x86_64.rpm
kernel-devel-2.6.32-431.75.1.el6.x86_64.rpm
kernel-headers-2.6.32-431.75.1.el6.x86_64.rpm
perf-2.6.32-431.75.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional AUS (v. 6.5):

Source:
kernel-2.6.32-431.75.1.el6.src.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-431.75.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
python-perf-2.6.32-431.75.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm

Red Hat Enterprise Linux Server Optional TUS (v. 6.5):

Source:
kernel-2.6.32-431.75.1.el6.src.rpm

x86_64:
kernel-debug-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
kernel-debuginfo-common-x86_64-2.6.32-431.75.1.el6.x86_64.rpm
perf-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
python-perf-2.6.32-431.75.1.el6.x86_64.rpm
python-perf-debuginfo-2.6.32-431.75.1.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-2016-5195
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 6.5: RHSA-2016:2120-01 Important Kernel Privilege Escalation

red hat
Calendar Grey October 27, 2016
Dist Redhat Esm H88
A significant security patch for Red Hat Enterprise Linux 6.5 tackles critical vulnerabilities and necessitates a reboot for proper application.
An update for kernel is now available for Red Hat Enterprise Linux 6.5 Advanced Update Support and Red Hat Enterprise Linux 6.5 Telco 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 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 this issue.

References

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 Server AUS (v. 6.5):
Source: kernel-2.6.32-431.75.1.el6.src.rpm
noarch: kernel-abi-whitelists-2.6.32-431.75.1.el6.noarch.rpm kernel-doc-2.6.32-431.75.1.el6.noarch.rpm kernel-firmware-2.6.32-431.75.1.el6.noarch.rpm
x86_64: kernel-2.6.32-431.75.1.el6.x86_64.rpm kernel-debug-2.6.32-431.75.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-431.75.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-431.75.1.el6.x86_64.rpm kernel-devel-2.6.32-431.75.1.el6.x86_64.rpm kernel-headers-2.6.32-431.75.1.el6.x86_64.rpm perf-2.6.32-431.75.1.el6.x86_64.rpm perf-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm
Red Hat Enterprise Linux Server TUS (v. 6.5):
Source: kernel-2.6.32-431.75.1.el6.src.rpm
noarch: kernel-abi-whitelists-2.6.32-431.75.1.el6.noarch.rpm kernel-doc-2.6.32-431.75.1.el6.noarch.rpm kernel-firmware-2.6.32-431.75.1.el6.noarch.rpm
x86_64: kernel-2.6.32-431.75.1.el6.x86_64.rpm kernel-debug-2.6.32-431.75.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-431.75.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-431.75.1.el6.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:2120-01
Product: Red Hat Enterprise Linux
Issue date: 2016-10-27

Topic

An update for kernel is now available for Red Hat Enterprise Linux 6.5Advanced Update Support and Red Hat Enterprise Linux 6.5 Telco ExtendedUpdate 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.

Relevant Releases Architectures

Red Hat Enterprise Linux Server AUS (v. 6.5) - noarch, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 6.5) - x86_64

Red Hat Enterprise Linux Server Optional TUS (v. 6.5) - x86_64

Red Hat Enterprise Linux Server TUS (v. 6.5) - noarch, x86_64

Bugs Fixed

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

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