[RHSA-2016:1581-01] Important: kernel security update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Important: kernel security update

Advisory ID: RHSA-2016:1581-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-1581.html

Issue date: 2016-08-09

CVE Names: CVE-2016-4565

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1. Summary:

 

An update for kernel is now available for Red Hat Enterprise Linux 6.4

Advanced 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 Server AUS (v. 6.4) - noarch, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 6.4) - 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 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)

 

Red Hat would like to thank Jann Horn for reporting this issue.

 

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

 

6. Package List:

 

Red Hat Enterprise Linux Server AUS (v. 6.4):

 

Source:

kernel-2.6.32-358.72.1.el6.src.rpm

 

noarch:

kernel-doc-2.6.32-358.72.1.el6.noarch.rpm

kernel-firmware-2.6.32-358.72.1.el6.noarch.rpm

 

x86_64:

kernel-2.6.32-358.72.1.el6.x86_64.rpm

kernel-debug-2.6.32-358.72.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-358.72.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-358.72.1.el6.x86_64.rpm

kernel-devel-2.6.32-358.72.1.el6.x86_64.rpm

kernel-headers-2.6.32-358.72.1.el6.x86_64.rpm

perf-2.6.32-358.72.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional AUS (v. 6.4):

 

Source:

kernel-2.6.32-358.72.1.el6.src.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-358.72.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-358.72.1.el6.x86_64.rpm

python-perf-2.6.32-358.72.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-358.72.1.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-2016-4565

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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