RHEL 6 : kernel-rt (RHSA-2017:0402)

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-rt is now available for Red Hat Enterprise MRG 2.

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 provide the Real Time Linux Kernel, which
enables fine-tuning for systems with extremely high determinism
requirements.

Security Fix(es) :

* A race condition issue leading to a use-after-free flaw was found in
the way the raw packet sockets implementation in the Linux kernel
networking subsystem handled synchronization while creating the
TPACKET_V3 ring buffer. A local user able to open a raw packet socket
(requires the CAP_NET_RAW capability) could use this flaw to elevate
their privileges on the system. (CVE-2016-8655, Important)

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

Enhancement(s) :

* Previously, the Broadcom bnx2x driver in the MRG kernel-rt used an
incorrect PTP Hardware Clock (PHC) timer divisor value, which broke
Precision Time Protocol (PTP) timestamping due to an unstable clock.
This update corrects the divisor value, and the PTP timestamping is
now accurate, with monotonically increasing timestamp values.
(BZ#1411139)

See also :

https://www.redhat.com/security/data/cve/CVE-2016-8655.html
http://rhn.redhat.com/errata/RHSA-2017-0402.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 : 6.0
(CVSS2#E:F/RL:OF/RC:ND)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 97513 ()

Bugtraq ID:

CVE ID: CVE-2016-8655

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