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[RHSA-2016:1657-01] Important: kernel security update

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Red Hat Security Advisory

 

Synopsis: Important: kernel security update

Advisory ID: RHSA-2016:1657-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-1657.html

Issue date: 2016-08-23

CVE Names: CVE-2016-4470 CVE-2016-4565 CVE-2016-5696

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

 

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 Linux kernel's keyring handling code, where in

key_reject_and_link() an uninitialised variable would eventually lead to

arbitrary free address which could allow attacker to use a use-after-free

style attack. (CVE-2016-4470, Important)

 

* A flaw was found in the way certain interfaces of the Linux kernel's

Infiniband subsystem used write() as bi-directional ioctl() replacement,

which could lead to insufficient memory security checks when being invoked

using the splice() system call. A local unprivileged user on a system with

either Infiniband hardware present or RDMA Userspace Connection Manager

Access module explicitly loaded, could use this flaw to escalate their

privileges on the system. (CVE-2016-4565, Important)

 

* A flaw was found in the implementation of the Linux kernel's handling of

networking challenge ack where an attacker is able to determine the shared

counter which could be used to determine sequence numbers for TCP stream

injection. (CVE-2016-5696, Important)

 

Red Hat would like to thank Jann Horn for reporting CVE-2016-4565 and Yue

Cao (Cyber Security Group of the CS department of University of California

in Riverside) for reporting CVE-2016-5696. The CVE-2016-4470 issue was

discovered by David Howells (Red Hat Inc.).

 

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/):

 

1310570 - CVE-2016-4565 kernel: infiniband: Unprivileged process can overwrite kernel memory using rdma_ucm.ko

1341716 - CVE-2016-4470 kernel: Uninitialized variable in request_key handling causes kernel crash in error handling path

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

 

6. Package List:

 

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

 

Source:

kernel-3.10.0-229.40.1.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-229.40.1.el7.noarch.rpm

kernel-doc-3.10.0-229.40.1.el7.noarch.rpm

 

x86_64:

kernel-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debug-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debug-devel-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-229.40.1.el7.x86_64.rpm

kernel-devel-3.10.0-229.40.1.el7.x86_64.rpm

kernel-headers-3.10.0-229.40.1.el7.x86_64.rpm

kernel-tools-3.10.0-229.40.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-tools-libs-3.10.0-229.40.1.el7.x86_64.rpm

perf-3.10.0-229.40.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

 

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

 

x86_64:

kernel-debug-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-229.40.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-229.40.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

python-perf-3.10.0-229.40.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

 

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

 

Source:

kernel-3.10.0-229.40.1.el7.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-229.40.1.el7.noarch.rpm

kernel-doc-3.10.0-229.40.1.el7.noarch.rpm

 

ppc64:

kernel-3.10.0-229.40.1.el7.ppc64.rpm

kernel-bootwrapper-3.10.0-229.40.1.el7.ppc64.rpm

kernel-debug-3.10.0-229.40.1.el7.ppc64.rpm

kernel-debug-debuginfo-3.10.0-229.40.1.el7.ppc64.rpm

kernel-debug-devel-3.10.0-229.40.1.el7.ppc64.rpm

kernel-debuginfo-3.10.0-229.40.1.el7.ppc64.rpm

kernel-debuginfo-common-ppc64-3.10.0-229.40.1.el7.ppc64.rpm

kernel-devel-3.10.0-229.40.1.el7.ppc64.rpm

kernel-headers-3.10.0-229.40.1.el7.ppc64.rpm

kernel-tools-3.10.0-229.40.1.el7.ppc64.rpm

kernel-tools-debuginfo-3.10.0-229.40.1.el7.ppc64.rpm

kernel-tools-libs-3.10.0-229.40.1.el7.ppc64.rpm

perf-3.10.0-229.40.1.el7.ppc64.rpm

perf-debuginfo-3.10.0-229.40.1.el7.ppc64.rpm

python-perf-debuginfo-3.10.0-229.40.1.el7.ppc64.rpm

 

s390x:

kernel-3.10.0-229.40.1.el7.s390x.rpm

kernel-debug-3.10.0-229.40.1.el7.s390x.rpm

kernel-debug-debuginfo-3.10.0-229.40.1.el7.s390x.rpm

kernel-debug-devel-3.10.0-229.40.1.el7.s390x.rpm

kernel-debuginfo-3.10.0-229.40.1.el7.s390x.rpm

kernel-debuginfo-common-s390x-3.10.0-229.40.1.el7.s390x.rpm

kernel-devel-3.10.0-229.40.1.el7.s390x.rpm

kernel-headers-3.10.0-229.40.1.el7.s390x.rpm

kernel-kdump-3.10.0-229.40.1.el7.s390x.rpm

kernel-kdump-debuginfo-3.10.0-229.40.1.el7.s390x.rpm

kernel-kdump-devel-3.10.0-229.40.1.el7.s390x.rpm

perf-3.10.0-229.40.1.el7.s390x.rpm

perf-debuginfo-3.10.0-229.40.1.el7.s390x.rpm

python-perf-debuginfo-3.10.0-229.40.1.el7.s390x.rpm

 

x86_64:

kernel-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debug-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debug-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debug-devel-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-229.40.1.el7.x86_64.rpm

kernel-devel-3.10.0-229.40.1.el7.x86_64.rpm

kernel-headers-3.10.0-229.40.1.el7.x86_64.rpm

kernel-tools-3.10.0-229.40.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-tools-libs-3.10.0-229.40.1.el7.x86_64.rpm

perf-3.10.0-229.40.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

 

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

 

Source:

kernel-3.10.0-229.40.1.ael7b.src.rpm

 

noarch:

kernel-abi-whitelists-3.10.0-229.40.1.ael7b.noarch.rpm

kernel-doc-3.10.0-229.40.1.ael7b.noarch.rpm

 

ppc64le:

kernel-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-bootwrapper-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-debug-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-debug-debuginfo-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-debuginfo-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-debuginfo-common-ppc64le-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-devel-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-headers-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-tools-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-tools-debuginfo-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-tools-libs-3.10.0-229.40.1.ael7b.ppc64le.rpm

perf-3.10.0-229.40.1.ael7b.ppc64le.rpm

perf-debuginfo-3.10.0-229.40.1.ael7b.ppc64le.rpm

python-perf-debuginfo-3.10.0-229.40.1.ael7b.ppc64le.rpm

 

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

 

ppc64:

kernel-debug-debuginfo-3.10.0-229.40.1.el7.ppc64.rpm

kernel-debuginfo-3.10.0-229.40.1.el7.ppc64.rpm

kernel-debuginfo-common-ppc64-3.10.0-229.40.1.el7.ppc64.rpm

kernel-tools-debuginfo-3.10.0-229.40.1.el7.ppc64.rpm

kernel-tools-libs-devel-3.10.0-229.40.1.el7.ppc64.rpm

perf-debuginfo-3.10.0-229.40.1.el7.ppc64.rpm

python-perf-3.10.0-229.40.1.el7.ppc64.rpm

python-perf-debuginfo-3.10.0-229.40.1.el7.ppc64.rpm

 

s390x:

kernel-debug-debuginfo-3.10.0-229.40.1.el7.s390x.rpm

kernel-debuginfo-3.10.0-229.40.1.el7.s390x.rpm

kernel-debuginfo-common-s390x-3.10.0-229.40.1.el7.s390x.rpm

kernel-kdump-debuginfo-3.10.0-229.40.1.el7.s390x.rpm

perf-debuginfo-3.10.0-229.40.1.el7.s390x.rpm

python-perf-3.10.0-229.40.1.el7.s390x.rpm

python-perf-debuginfo-3.10.0-229.40.1.el7.s390x.rpm

 

x86_64:

kernel-debug-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-debuginfo-common-x86_64-3.10.0-229.40.1.el7.x86_64.rpm

kernel-tools-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

kernel-tools-libs-devel-3.10.0-229.40.1.el7.x86_64.rpm

perf-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

python-perf-3.10.0-229.40.1.el7.x86_64.rpm

python-perf-debuginfo-3.10.0-229.40.1.el7.x86_64.rpm

 

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

 

ppc64le:

kernel-debug-debuginfo-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-debug-devel-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-debuginfo-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-debuginfo-common-ppc64le-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-tools-debuginfo-3.10.0-229.40.1.ael7b.ppc64le.rpm

kernel-tools-libs-devel-3.10.0-229.40.1.ael7b.ppc64le.rpm

perf-debuginfo-3.10.0-229.40.1.ael7b.ppc64le.rpm

python-perf-3.10.0-229.40.1.ael7b.ppc64le.rpm

python-perf-debuginfo-3.10.0-229.40.1.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-2016-4470

https://access.redhat.com/security/cve/CVE-2016-4565

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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