[RHSA-2017:0501-01] Important: kernel security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: kernel security and bug fix update

Advisory ID: RHSA-2017:0501-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0501.html

Issue date: 2017-03-14

CVE Names: CVE-2017-6074

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

 

1. Summary:

 

An update for kernel is now available for Red Hat Enterprise Linux 7.2

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. 7.2) - noarch, x86_64

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.2) - x86_64

Red Hat Enterprise Linux Server EUS (v. 7.2) - noarch, ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional EUS (v. 7.2) - ppc64, ppc64le, x86_64

 

3. Description:

 

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

operating system.

 

Security Fix(es):

 

* A use-after-free flaw was found in the way the Linux kernel's Datagram

Congestion Control Protocol (DCCP) implementation freed SKB (socket buffer)

resources for a DCCP_PKT_REQUEST packet when the IPV6_RECVPKTINFO option is

set on the socket. A local, unprivileged user could use this flaw to alter

the kernel memory, allowing them to escalate their privileges on the

system. (CVE-2017-6074, Important)

 

Red Hat would like to thank Andrey Konovalov (Google) for reporting this

issue.

 

Bug Fix(es):

 

* Previously, running the "ethtool -S" command to get the statistics of a

Brocade Network Adapter (BNA) sometimes caused a kernel panic. This update

applies a set of patches to the bna driver, and the kernel panic no longer

occurs in the described scenario. (BZ#1408130)

 

* Use of a multi-threaded workload with high memory mappings sometimes

caused a kernel panic, due to a race condition between the context switch

and the pagetable upgrade. This update fixes the switch_mm() by using the

complete asce parameter instead of the asce_bits parameter. As a result,

the kernel no longer panics in the described scenario. (BZ#1410865)

 

* Previously, the kernel was sending a Transmission Control Protocol (TCP)

window which had a size of zero for a socket with an empty receive queue.

Consequently, the TCP session became unresponsive. This update fixes the

ibmveth driver to set correct values of the gso_size and gso_type variables

and to calculate the value of the gso_segs variable for large packets. As a

result, the TCP session no longer hangs in the described scenario.

(BZ#1411381)

 

* Previously, booting a kdump kernel in some cases failed with this error:

 

Kernel panic - not syncing: Watchdog detected hard LOCKUP on CPU 0.

 

This update ensures that the hpet timer software counters, including

hpet_default_delta and hpet_t1_cmp, are initialized before an interrupt

request is registered, and the kdump kernel now boots without the mentioned

error message. (BZ#1404183)

 

* When one of the drives became unresponsive, all other drives

intermittently hung, because the megaraid_sas driver incorrectly sent a

reset request to the PowerEdge RAID Controller (PERC). This update fixes

megaraid_sas, and thus the hang of one drive no longer leads to

intermittent loss of access to all drives on the system. (BZ#1398174)

 

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/):

 

1423071 - CVE-2017-6074 kernel: use after free in dccp protocol

 

6. Package List:

 

Red Hat Enterprise Linux ComputeNode EUS (v. 7.2):

 

Source:

kernel-3.10.0-327.49.2.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-327.49.2.el7.noarch.rpm

kernel-doc-3.10.0-327.49.2.el7.noarch.rpm

 

x86_64:

kernel-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debug-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debug-devel-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.49.2.el7.x86_64.rpm

kernel-devel-3.10.0-327.49.2.el7.x86_64.rpm

kernel-headers-3.10.0-327.49.2.el7.x86_64.rpm

kernel-tools-3.10.0-327.49.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-tools-libs-3.10.0-327.49.2.el7.x86_64.rpm

perf-3.10.0-327.49.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

python-perf-3.10.0-327.49.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

 

Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.2):

 

x86_64:

kernel-debug-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.49.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-327.49.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server EUS (v. 7.2):

 

Source:

kernel-3.10.0-327.49.2.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-327.49.2.el7.noarch.rpm

kernel-doc-3.10.0-327.49.2.el7.noarch.rpm

 

ppc64:

kernel-3.10.0-327.49.2.el7.ppc64.rpm

kernel-bootwrapper-3.10.0-327.49.2.el7.ppc64.rpm

kernel-debug-3.10.0-327.49.2.el7.ppc64.rpm

kernel-debug-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm

kernel-debug-devel-3.10.0-327.49.2.el7.ppc64.rpm

kernel-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm

kernel-debuginfo-common-ppc64-3.10.0-327.49.2.el7.ppc64.rpm

kernel-devel-3.10.0-327.49.2.el7.ppc64.rpm

kernel-headers-3.10.0-327.49.2.el7.ppc64.rpm

kernel-tools-3.10.0-327.49.2.el7.ppc64.rpm

kernel-tools-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm

kernel-tools-libs-3.10.0-327.49.2.el7.ppc64.rpm

perf-3.10.0-327.49.2.el7.ppc64.rpm

perf-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm

python-perf-3.10.0-327.49.2.el7.ppc64.rpm

python-perf-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm

 

ppc64le:

kernel-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-bootwrapper-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-debug-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-debug-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-debuginfo-common-ppc64le-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-devel-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-headers-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-tools-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-tools-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-tools-libs-3.10.0-327.49.2.el7.ppc64le.rpm

perf-3.10.0-327.49.2.el7.ppc64le.rpm

perf-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm

python-perf-3.10.0-327.49.2.el7.ppc64le.rpm

python-perf-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm

 

s390x:

kernel-3.10.0-327.49.2.el7.s390x.rpm

kernel-debug-3.10.0-327.49.2.el7.s390x.rpm

kernel-debug-debuginfo-3.10.0-327.49.2.el7.s390x.rpm

kernel-debug-devel-3.10.0-327.49.2.el7.s390x.rpm

kernel-debuginfo-3.10.0-327.49.2.el7.s390x.rpm

kernel-debuginfo-common-s390x-3.10.0-327.49.2.el7.s390x.rpm

kernel-devel-3.10.0-327.49.2.el7.s390x.rpm

kernel-headers-3.10.0-327.49.2.el7.s390x.rpm

kernel-kdump-3.10.0-327.49.2.el7.s390x.rpm

kernel-kdump-debuginfo-3.10.0-327.49.2.el7.s390x.rpm

kernel-kdump-devel-3.10.0-327.49.2.el7.s390x.rpm

perf-3.10.0-327.49.2.el7.s390x.rpm

perf-debuginfo-3.10.0-327.49.2.el7.s390x.rpm

python-perf-3.10.0-327.49.2.el7.s390x.rpm

python-perf-debuginfo-3.10.0-327.49.2.el7.s390x.rpm

 

x86_64:

kernel-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debug-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debug-devel-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.49.2.el7.x86_64.rpm

kernel-devel-3.10.0-327.49.2.el7.x86_64.rpm

kernel-headers-3.10.0-327.49.2.el7.x86_64.rpm

kernel-tools-3.10.0-327.49.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-tools-libs-3.10.0-327.49.2.el7.x86_64.rpm

perf-3.10.0-327.49.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

python-perf-3.10.0-327.49.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional EUS (v. 7.2):

 

ppc64:

kernel-debug-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm

kernel-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm

kernel-debuginfo-common-ppc64-3.10.0-327.49.2.el7.ppc64.rpm

kernel-tools-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm

kernel-tools-libs-devel-3.10.0-327.49.2.el7.ppc64.rpm

perf-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm

python-perf-debuginfo-3.10.0-327.49.2.el7.ppc64.rpm

 

ppc64le:

kernel-debug-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-debug-devel-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-debuginfo-common-ppc64le-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-tools-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm

kernel-tools-libs-devel-3.10.0-327.49.2.el7.ppc64le.rpm

perf-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm

python-perf-debuginfo-3.10.0-327.49.2.el7.ppc64le.rpm

 

x86_64:

kernel-debug-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-327.49.2.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-327.49.2.el7.x86_64.rpm

perf-debuginfo-3.10.0-327.49.2.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-327.49.2.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-2017-6074

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 2017 Red Hat, Inc.

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