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Sicherheit: Denial of Service in Linux
Aktuelle Meldungen Distributionen
Name: Denial of Service in Linux
ID: RHSA-2017:0004-01
Distribution: Red Hat
Plattformen: Red Hat Enterprise Linux
Datum: Di, 3. Januar 2017, 22:37
Referenzen: https://access.redhat.com/security/cve/CVE-2016-8666

Originalnachricht

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

Synopsis: Important: kernel security and bug fix update
Advisory ID: RHSA-2017:0004-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0004.html
Issue date: 2017-01-03
CVE Names: CVE-2016-8666
=====================================================================

1. Summary:

An update for kernel is now available for Red Hat Enterprise Linux 7.1
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 ComputeNode EUS (v. 7.1) - noarch, x86_64
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) - x86_64
Red Hat Enterprise Linux Server EUS (v. 7.1) - noarch, ppc64, ppc64le, s390x,
x86_64
Red Hat Enterprise Linux Server Optional EUS (v. 7.1) - ppc64, ppc64le, 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 way the Linux kernel's networking subsystem
handled offloaded packets with multiple layers of encapsulation in the GRO
(Generic Receive Offload) code path. A remote attacker could use this flaw
to trigger unbounded recursion in the kernel that could lead to stack
corruption, resulting in a system crash. (CVE-2016-8666, Important)

Bug Fix(es):

* When a virtual machine (VM) with PCI-Passthrough interfaces was
recreated, the operating system rebooted. This update fixes the race
condition between the eventfd daemon and the virqfd daemon. As a result,
the operating system no longer reboots in the described situation.
(BZ#1391609)

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/):

1384991 - CVE-2016-8666 kernel: Remotely triggerable recursion in GRE code
leading to kernel crash

6. Package List:

Red Hat Enterprise Linux ComputeNode EUS (v. 7.1):

Source:
kernel-3.10.0-229.46.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-229.46.1.el7.noarch.rpm
kernel-doc-3.10.0-229.46.1.el7.noarch.rpm

x86_64:
kernel-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debug-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-229.46.1.el7.x86_64.rpm
kernel-devel-3.10.0-229.46.1.el7.x86_64.rpm
kernel-headers-3.10.0-229.46.1.el7.x86_64.rpm
kernel-tools-3.10.0-229.46.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-229.46.1.el7.x86_64.rpm
perf-3.10.0-229.46.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1):

x86_64:
kernel-debug-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-229.46.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-229.46.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
python-perf-3.10.0-229.46.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.1):

Source:
kernel-3.10.0-229.46.1.el7.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-229.46.1.el7.noarch.rpm
kernel-doc-3.10.0-229.46.1.el7.noarch.rpm

ppc64:
kernel-3.10.0-229.46.1.el7.ppc64.rpm
kernel-bootwrapper-3.10.0-229.46.1.el7.ppc64.rpm
kernel-debug-3.10.0-229.46.1.el7.ppc64.rpm
kernel-debug-debuginfo-3.10.0-229.46.1.el7.ppc64.rpm
kernel-debug-devel-3.10.0-229.46.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-229.46.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-229.46.1.el7.ppc64.rpm
kernel-devel-3.10.0-229.46.1.el7.ppc64.rpm
kernel-headers-3.10.0-229.46.1.el7.ppc64.rpm
kernel-tools-3.10.0-229.46.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-229.46.1.el7.ppc64.rpm
kernel-tools-libs-3.10.0-229.46.1.el7.ppc64.rpm
perf-3.10.0-229.46.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-229.46.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-229.46.1.el7.ppc64.rpm

s390x:
kernel-3.10.0-229.46.1.el7.s390x.rpm
kernel-debug-3.10.0-229.46.1.el7.s390x.rpm
kernel-debug-debuginfo-3.10.0-229.46.1.el7.s390x.rpm
kernel-debug-devel-3.10.0-229.46.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-229.46.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-229.46.1.el7.s390x.rpm
kernel-devel-3.10.0-229.46.1.el7.s390x.rpm
kernel-headers-3.10.0-229.46.1.el7.s390x.rpm
kernel-kdump-3.10.0-229.46.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-229.46.1.el7.s390x.rpm
kernel-kdump-devel-3.10.0-229.46.1.el7.s390x.rpm
perf-3.10.0-229.46.1.el7.s390x.rpm
perf-debuginfo-3.10.0-229.46.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-229.46.1.el7.s390x.rpm

x86_64:
kernel-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debug-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debug-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debug-devel-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-229.46.1.el7.x86_64.rpm
kernel-devel-3.10.0-229.46.1.el7.x86_64.rpm
kernel-headers-3.10.0-229.46.1.el7.x86_64.rpm
kernel-tools-3.10.0-229.46.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-tools-libs-3.10.0-229.46.1.el7.x86_64.rpm
perf-3.10.0-229.46.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server EUS (v. 7.1):

Source:
kernel-3.10.0-229.46.1.ael7b.src.rpm

noarch:
kernel-abi-whitelists-3.10.0-229.46.1.ael7b.noarch.rpm
kernel-doc-3.10.0-229.46.1.ael7b.noarch.rpm

ppc64le:
kernel-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-bootwrapper-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-debug-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-debug-debuginfo-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-debuginfo-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-devel-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-headers-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-tools-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-tools-libs-3.10.0-229.46.1.ael7b.ppc64le.rpm
perf-3.10.0-229.46.1.ael7b.ppc64le.rpm
perf-debuginfo-3.10.0-229.46.1.ael7b.ppc64le.rpm
python-perf-debuginfo-3.10.0-229.46.1.ael7b.ppc64le.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 7.1):

ppc64:
kernel-debug-debuginfo-3.10.0-229.46.1.el7.ppc64.rpm
kernel-debuginfo-3.10.0-229.46.1.el7.ppc64.rpm
kernel-debuginfo-common-ppc64-3.10.0-229.46.1.el7.ppc64.rpm
kernel-tools-debuginfo-3.10.0-229.46.1.el7.ppc64.rpm
kernel-tools-libs-devel-3.10.0-229.46.1.el7.ppc64.rpm
perf-debuginfo-3.10.0-229.46.1.el7.ppc64.rpm
python-perf-3.10.0-229.46.1.el7.ppc64.rpm
python-perf-debuginfo-3.10.0-229.46.1.el7.ppc64.rpm

s390x:
kernel-debug-debuginfo-3.10.0-229.46.1.el7.s390x.rpm
kernel-debuginfo-3.10.0-229.46.1.el7.s390x.rpm
kernel-debuginfo-common-s390x-3.10.0-229.46.1.el7.s390x.rpm
kernel-kdump-debuginfo-3.10.0-229.46.1.el7.s390x.rpm
perf-debuginfo-3.10.0-229.46.1.el7.s390x.rpm
python-perf-3.10.0-229.46.1.el7.s390x.rpm
python-perf-debuginfo-3.10.0-229.46.1.el7.s390x.rpm

x86_64:
kernel-debug-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-debuginfo-common-x86_64-3.10.0-229.46.1.el7.x86_64.rpm
kernel-tools-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
kernel-tools-libs-devel-3.10.0-229.46.1.el7.x86_64.rpm
perf-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm
python-perf-3.10.0-229.46.1.el7.x86_64.rpm
python-perf-debuginfo-3.10.0-229.46.1.el7.x86_64.rpm

Red Hat Enterprise Linux Server Optional EUS (v. 7.1):

ppc64le:
kernel-debug-debuginfo-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-debug-devel-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-debuginfo-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-debuginfo-common-ppc64le-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-tools-debuginfo-3.10.0-229.46.1.ael7b.ppc64le.rpm
kernel-tools-libs-devel-3.10.0-229.46.1.ael7b.ppc64le.rpm
perf-debuginfo-3.10.0-229.46.1.ael7b.ppc64le.rpm
python-perf-3.10.0-229.46.1.ael7b.ppc64le.rpm
python-perf-debuginfo-3.10.0-229.46.1.ael7b.ppc64le.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-2016-8666
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2017 Red Hat, Inc.
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