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[RHSA-2016:1815-01] Important: kernel security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Important: kernel security and bug fix update

Advisory ID: RHSA-2016:1815-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-1815.html

Issue date: 2016-09-06

CVE Names: CVE-2016-5696

=====================================================================

 

1. Summary:

 

An update for kernel is now available for Red Hat Enterprise Linux 6.7

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. 6.7) - noarch, x86_64

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) - x86_64

Red Hat Enterprise Linux Server EUS (v. 6.7) - i386, noarch, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 6.7) - i386, ppc64, s390x, x86_64

 

3. Description:

 

The kernel packages contain the Linux kernel, the core of any Linux

operating system.

 

Security Fix(es):

 

* It was found that the RFC 5961 challenge ACK rate limiting as implemented

in the Linux kernel's networking subsystem allowed an off-path attacker to

leak certain information about a given connection by creating congestion on

the global challenge ACK rate limit counter and then measuring the changes

by probing packets. An off-path attacker could use this flaw to either

terminate TCP connection and/or inject payload into non-secured TCP

connection between two endpoints on the network. (CVE-2016-5696, Important)

 

Red Hat would like to thank Yue Cao (Cyber Security Group of the CS

department of University of California in Riverside) for reporting this

issue.

 

Bug Fix(es):

 

* When an interrupt request occurred and the new API was scheduled on a

different CPU, the enic driver previously generated a warning message. This

behavior was caused by a race condition between the vnic_intr_unmask()

function and the enic_poll_unlock_napi() function. This update fixes the

napi_poll() function to unlock before unmasking the interrupt. As a result,

the warning message no longer occurs in the described situation.

(BZ#1351192)

 

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/):

 

1354708 - CVE-2016-5696 kernel: challenge ACK counter information disclosure.

 

6. Package List:

 

Red Hat Enterprise Linux HPC Node EUS (v. 6.7):

 

Source:

kernel-2.6.32-573.34.1.el6.src.rpm

 

noarch:

kernel-abi-whitelists-2.6.32-573.34.1.el6.noarch.rpm

kernel-doc-2.6.32-573.34.1.el6.noarch.rpm

kernel-firmware-2.6.32-573.34.1.el6.noarch.rpm

 

x86_64:

kernel-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debug-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-573.34.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-573.34.1.el6.i686.rpm

kernel-debug-devel-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.i686.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debuginfo-common-i686-2.6.32-573.34.1.el6.i686.rpm

kernel-debuginfo-common-x86_64-2.6.32-573.34.1.el6.x86_64.rpm

kernel-devel-2.6.32-573.34.1.el6.x86_64.rpm

kernel-headers-2.6.32-573.34.1.el6.x86_64.rpm

perf-2.6.32-573.34.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-573.34.1.el6.i686.rpm

perf-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-573.34.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7):

 

x86_64:

kernel-debug-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-573.34.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

python-perf-2.6.32-573.34.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server EUS (v. 6.7):

 

Source:

kernel-2.6.32-573.34.1.el6.src.rpm

 

i386:

kernel-2.6.32-573.34.1.el6.i686.rpm

kernel-debug-2.6.32-573.34.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-573.34.1.el6.i686.rpm

kernel-debug-devel-2.6.32-573.34.1.el6.i686.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-573.34.1.el6.i686.rpm

kernel-devel-2.6.32-573.34.1.el6.i686.rpm

kernel-headers-2.6.32-573.34.1.el6.i686.rpm

perf-2.6.32-573.34.1.el6.i686.rpm

perf-debuginfo-2.6.32-573.34.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-573.34.1.el6.i686.rpm

 

noarch:

kernel-abi-whitelists-2.6.32-573.34.1.el6.noarch.rpm

kernel-doc-2.6.32-573.34.1.el6.noarch.rpm

kernel-firmware-2.6.32-573.34.1.el6.noarch.rpm

 

ppc64:

kernel-2.6.32-573.34.1.el6.ppc64.rpm

kernel-bootwrapper-2.6.32-573.34.1.el6.ppc64.rpm

kernel-debug-2.6.32-573.34.1.el6.ppc64.rpm

kernel-debug-debuginfo-2.6.32-573.34.1.el6.ppc64.rpm

kernel-debug-devel-2.6.32-573.34.1.el6.ppc64.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.ppc64.rpm

kernel-debuginfo-common-ppc64-2.6.32-573.34.1.el6.ppc64.rpm

kernel-devel-2.6.32-573.34.1.el6.ppc64.rpm

kernel-headers-2.6.32-573.34.1.el6.ppc64.rpm

perf-2.6.32-573.34.1.el6.ppc64.rpm

perf-debuginfo-2.6.32-573.34.1.el6.ppc64.rpm

python-perf-debuginfo-2.6.32-573.34.1.el6.ppc64.rpm

 

s390x:

kernel-2.6.32-573.34.1.el6.s390x.rpm

kernel-debug-2.6.32-573.34.1.el6.s390x.rpm

kernel-debug-debuginfo-2.6.32-573.34.1.el6.s390x.rpm

kernel-debug-devel-2.6.32-573.34.1.el6.s390x.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.s390x.rpm

kernel-debuginfo-common-s390x-2.6.32-573.34.1.el6.s390x.rpm

kernel-devel-2.6.32-573.34.1.el6.s390x.rpm

kernel-headers-2.6.32-573.34.1.el6.s390x.rpm

kernel-kdump-2.6.32-573.34.1.el6.s390x.rpm

kernel-kdump-debuginfo-2.6.32-573.34.1.el6.s390x.rpm

kernel-kdump-devel-2.6.32-573.34.1.el6.s390x.rpm

perf-2.6.32-573.34.1.el6.s390x.rpm

perf-debuginfo-2.6.32-573.34.1.el6.s390x.rpm

python-perf-debuginfo-2.6.32-573.34.1.el6.s390x.rpm

 

x86_64:

kernel-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debug-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-573.34.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-573.34.1.el6.i686.rpm

kernel-debug-devel-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.i686.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debuginfo-common-i686-2.6.32-573.34.1.el6.i686.rpm

kernel-debuginfo-common-x86_64-2.6.32-573.34.1.el6.x86_64.rpm

kernel-devel-2.6.32-573.34.1.el6.x86_64.rpm

kernel-headers-2.6.32-573.34.1.el6.x86_64.rpm

perf-2.6.32-573.34.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-573.34.1.el6.i686.rpm

perf-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-573.34.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional EUS (v. 6.7):

 

i386:

kernel-debug-debuginfo-2.6.32-573.34.1.el6.i686.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-573.34.1.el6.i686.rpm

perf-debuginfo-2.6.32-573.34.1.el6.i686.rpm

python-perf-2.6.32-573.34.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-573.34.1.el6.i686.rpm

 

ppc64:

kernel-debug-debuginfo-2.6.32-573.34.1.el6.ppc64.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.ppc64.rpm

kernel-debuginfo-common-ppc64-2.6.32-573.34.1.el6.ppc64.rpm

perf-debuginfo-2.6.32-573.34.1.el6.ppc64.rpm

python-perf-2.6.32-573.34.1.el6.ppc64.rpm

python-perf-debuginfo-2.6.32-573.34.1.el6.ppc64.rpm

 

s390x:

kernel-debug-debuginfo-2.6.32-573.34.1.el6.s390x.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.s390x.rpm

kernel-debuginfo-common-s390x-2.6.32-573.34.1.el6.s390x.rpm

kernel-kdump-debuginfo-2.6.32-573.34.1.el6.s390x.rpm

perf-debuginfo-2.6.32-573.34.1.el6.s390x.rpm

python-perf-2.6.32-573.34.1.el6.s390x.rpm

python-perf-debuginfo-2.6.32-573.34.1.el6.s390x.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-573.34.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-573.34.1.el6.x86_64.rpm

python-perf-2.6.32-573.34.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-573.34.1.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/

 

7. References:

 

https://access.redhat.com/security/cve/CVE-2016-5696

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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