RHEL 7 : kernel-rt (RHSA-2016:1051)

This script is Copyright (C) 2016-2017 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

An update for kernel-rt is now available for Red Hat Enterprise Linux
7.

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.

The kernel-rt packages contain the Linux kernel, the core of any Linux
operating system.

The following packages have been upgraded to a newer upstream version:
kernel-rt (3.10.0-327.18.2). This version provides a number of bug
fixes and enhancements, including :

* [scsi] bnx2fc: Fix FCP RSP residual parsing and remove explicit
logouts

* [scsi] mpt3sas: Fix for Asynchronous completion of timedout IO and
task abort of timedout IO

* [scsi] scsi_error: should not get sense for timeout IO in scsi error
handler

* [scsi] Revert libiscsi: Reduce locking contention in fast path

* [mm] madvise: fix MADV_WILLNEED on shmem swapouts

* [cpufreq] intel_pstate: decrease number of 'HWP enabled' messages
and enable HWP per CPU

* [kernel] sched: Robustify topology setup

* [kernel] sched/fair: Disable tg load_avg/runnable_avg update for
root_task_group

* [kernel] sched/fair: Move hot load_avg/runnable_avg into separate
cacheline

* [ib] mlx5: Fix RC transport send queue overhead computation

* [fs] nfsd: fix clp->cl_revoked list deletion causing softlock in
nfsd

* [fs] ceph: multiple updates

(BZ#1322033)

Security Fix(es) :

* A flaw was found in the way the Linux kernel's ASN.1 DER decoder
processed certain certificate files with tags of indefinite length. A
local, unprivileged user could use a specially crafted X.509
certificate DER file to crash the system or, potentially, escalate
their privileges on the system. (CVE-2016-0758, Important)

Red Hat would like to thank Philip Pettersson of Samsung for reporting
this issue.

Bug Fix(es) :

* The hotplug lock and the console semaphore could be acquired in an
incorrect order, which could previously lead to a deadlock causing the
system console to freeze. The underlying code has been adjusted to
acquire the locks in the correct order, resolving the bug with the
console. (BZ#1324767)

See also :

https://www.redhat.com/security/data/cve/CVE-2016-0758.html
http://rhn.redhat.com/errata/RHSA-2016-1051.html

Solution :

Update the affected packages.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 5.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 91116 ()

Bugtraq ID:

CVE ID: CVE-2016-0758

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