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Red Hat Enterprise Linux 7: RHSA-2016:0064-01 Critical: Keyring Escalation

Redhat Large Esm H500
Updated kernel packages that fix one security issue are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Important security impact. A Common Vulnerability Scoring System (CVSS) base score, which
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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

Synopsis:          Important: kernel security update
Advisory ID:       RHSA-2016:0064-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2016:0064.html
Issue date:        2016-01-25
CVE Names:         CVE-2016-0728 
====================================================================
1. Summary:

Updated kernel packages that fix one security issue are now available for
Red Hat Enterprise Linux 7.

Red Hat Product Security 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 Client (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

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

* A use-after-free flaw was found in the way the Linux kernel's key
management subsystem handled keyring object reference counting in certain
error path of the join_session_keyring() function. A local, unprivileged
user could use this flaw to escalate their privileges on the system.
(CVE-2016-0728, Important)

Red Hat would like to thank the Perception Point research team for
reporting this issue.

All kernel users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. 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.

For details on how to apply this update, refer to:

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

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

1297475 - CVE-2016-0728 kernel: Possible use-after-free vulnerability in keyring facility

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
kernel-3.10.0-327.4.5.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-327.4.5.el7.noarch.rpm
kernel-doc-3.10.0-327.4.5.el7.noarch.rpm

x86_64:
kernel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-devel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-327.4.5.el7.x86_64.rpm
kernel-devel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-headers-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-libs-3.10.0-327.4.5.el7.x86_64.rpm
perf-3.10.0-327.4.5.el7.x86_64.rpm
perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
kernel-debug-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-327.4.5.el7.x86_64.rpm
perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
kernel-3.10.0-327.4.5.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-327.4.5.el7.noarch.rpm
kernel-doc-3.10.0-327.4.5.el7.noarch.rpm

x86_64:
kernel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-devel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-327.4.5.el7.x86_64.rpm
kernel-devel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-headers-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-libs-3.10.0-327.4.5.el7.x86_64.rpm
perf-3.10.0-327.4.5.el7.x86_64.rpm
perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
kernel-debug-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-327.4.5.el7.x86_64.rpm
perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
kernel-3.10.0-327.4.5.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-327.4.5.el7.noarch.rpm
kernel-doc-3.10.0-327.4.5.el7.noarch.rpm

ppc64:
kernel-3.10.0-327.4.5.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-327.4.5.el7.ppc64.rpm
kernel-debug-3.10.0-327.4.5.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-327.4.5.el7.ppc64.rpm
kernel-debug-devel-3.10.0-327.4.5.el7.ppc64.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-327.4.5.el7.ppc64.rpm
kernel-devel-3.10.0-327.4.5.el7.ppc64.rpm
kernel-headers-3.10.0-327.4.5.el7.ppc64.rpm
kernel-tools-3.10.0-327.4.5.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.ppc64.rpm
kernel-tools-libs-3.10.0-327.4.5.el7.ppc64.rpm
perf-3.10.0-327.4.5.el7.ppc64.rpm
perf-debuginfo-3.10.0-327.4.5.el7.ppc64.rpm
python-perf-3.10.0-327.4.5.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.ppc64.rpm

ppc64le:
kernel-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-bootwrapper-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-debug-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-devel-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-headers-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-tools-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-tools-libs-3.10.0-327.4.5.el7.ppc64le.rpm
perf-3.10.0-327.4.5.el7.ppc64le.rpm
perf-debuginfo-3.10.0-327.4.5.el7.ppc64le.rpm
python-perf-3.10.0-327.4.5.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.ppc64le.rpm

s390x:
kernel-3.10.0-327.4.5.el7.s390x.rpm
kernel-debug-3.10.0-327.4.5.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-327.4.5.el7.s390x.rpm
kernel-debug-devel-3.10.0-327.4.5.el7.s390x.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-327.4.5.el7.s390x.rpm
kernel-devel-3.10.0-327.4.5.el7.s390x.rpm
kernel-headers-3.10.0-327.4.5.el7.s390x.rpm
kernel-kdump-3.10.0-327.4.5.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-327.4.5.el7.s390x.rpm
kernel-kdump-devel-3.10.0-327.4.5.el7.s390x.rpm
perf-3.10.0-327.4.5.el7.s390x.rpm
perf-debuginfo-3.10.0-327.4.5.el7.s390x.rpm
python-perf-3.10.0-327.4.5.el7.s390x.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.s390x.rpm

x86_64:
kernel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-devel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-327.4.5.el7.x86_64.rpm
kernel-devel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-headers-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-libs-3.10.0-327.4.5.el7.x86_64.rpm
perf-3.10.0-327.4.5.el7.x86_64.rpm
perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64:
kernel-debug-debuginfo-3.10.0-327.4.5.el7.ppc64.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-327.4.5.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-327.4.5.el7.ppc64.rpm
perf-debuginfo-3.10.0-327.4.5.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.ppc64.rpm

ppc64le:
kernel-debug-debuginfo-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-debug-devel-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-327.4.5.el7.ppc64le.rpm
perf-debuginfo-3.10.0-327.4.5.el7.ppc64le.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.ppc64le.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-327.4.5.el7.x86_64.rpm
perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
kernel-3.10.0-327.4.5.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-327.4.5.el7.noarch.rpm
kernel-doc-3.10.0-327.4.5.el7.noarch.rpm

x86_64:
kernel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debug-devel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-327.4.5.el7.x86_64.rpm
kernel-devel-3.10.0-327.4.5.el7.x86_64.rpm
kernel-headers-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-libs-3.10.0-327.4.5.el7.x86_64.rpm
perf-3.10.0-327.4.5.el7.x86_64.rpm
perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
kernel-debug-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-327.4.5.el7.x86_64.rpm
perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-327.4.5.el7.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-2016-0728
https://access.redhat.com/security/updates/classification#important

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 Enterprise Linux 7: RHSA-2016:0064-01 Critical: Keyring Escalation

red hat
Calendar Grey January 25, 2016
Dist Redhat Esm H88
Crucial system patch released for CentOS addresses major vulnerability. Implement for improved protection.
Updated kernel packages that fix one security issue are now available for Red Hat Enterprise Linux 7

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

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

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
* A use-after-free flaw was found in the way the Linux kernel's key management subsystem handled keyring object reference counting in certain error path of the join_session_keyring() function. A local, unprivileged user could use this flaw to escalate their privileges on the system. (CVE-2016-0728, Important)
Red Hat would like to thank the Perception Point research team for reporting this issue.
All kernel users are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. The system must be rebooted for this update to take effect.

References

https://access.redhat.com/security/cve/CVE-2016-0728 https://access.redhat.com/security/updates/classification#important

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: kernel-3.10.0-327.4.5.el7.src.rpm
noarch: kernel-abi-whitelists-3.10.0-327.4.5.el7.noarch.rpm kernel-doc-3.10.0-327.4.5.el7.noarch.rpm
x86_64: kernel-3.10.0-327.4.5.el7.x86_64.rpm kernel-debug-3.10.0-327.4.5.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm kernel-debug-devel-3.10.0-327.4.5.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.4.5.el7.x86_64.rpm kernel-devel-3.10.0-327.4.5.el7.x86_64.rpm kernel-headers-3.10.0-327.4.5.el7.x86_64.rpm kernel-tools-3.10.0-327.4.5.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm kernel-tools-libs-3.10.0-327.4.5.el7.x86_64.rpm perf-3.10.0-327.4.5.el7.x86_64.rpm perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm python-perf-3.10.0-327.4.5.el7.x86_64.rpm python-perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: kernel-debug-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm kernel-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-327.4.5.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-327.4.5.el7.x86_64.rpm perf-debuginfo-3.10.0-327.4.5.el7.x86_64.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2016:0064-01
Product: Red Hat Enterprise Linux
Issue date: 2016-01-25

Topic

Updated kernel packages that fix one security issue are now available forRed Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having Important securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Relevant Releases Architectures

Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Client Optional (v. 7) - x86_64

Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64

Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

1297475 - CVE-2016-0728 kernel: Possible use-after-free vulnerability in keyring facility

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