RHEL 7 : kernel (RHSA-2017:0270)

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


Synopsis :

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

Description :

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.

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

Security Fix(es) :

* A use-after-free vulnerability was found in the kernel's socket
recvmmsg subsystem. This may allow remote attackers to corrupt memory
and may allow execution of arbitrary code. This corruption takes place
during the error handling routines within __sys_recvmmsg() function.
(CVE-2016-7117, Important)

Bug Fix(es) :

* Previously, an XFS corruption in some cases occurred on Seagate 8TB
drive based volumes after a planned system shutdown or reboot, when a
disk write back cache was used. With this update, the megaraid_sas
driver has been fixed and the XFS corruption no longer occurs in the
described scenario. (BZ#1398177)

* 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#1404180)

See also :

https://www.redhat.com/security/data/cve/CVE-2016-7117.html
http://rhn.redhat.com/errata/RHSA-2017-0270.html

Solution :

Update the affected packages.

Risk factor :

Critical / CVSS Base Score : 10.0
(CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 7.4
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Red Hat Local Security Checks

Nessus Plugin ID: 97185 ()

Bugtraq ID:

CVE ID: CVE-2016-7117

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