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Ubuntu Security Notice USN-2931-1

Ubuntu Security Notice USN-2931-1
Posted Mar 14, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 2931-1 - Ben Hawkes discovered that the Linux netfilter implementation did not correctly perform validation when handling IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. It was discovered that the Linux kernel did not properly enforce rlimits for file descriptors sent over UNIX domain sockets. A local attacker could use this to cause a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, arbitrary, kernel, local
systems | linux, unix, ubuntu
advisories | CVE-2013-4312, CVE-2015-8767, CVE-2016-2069, CVE-2016-2384, CVE-2016-2543, CVE-2016-2544, CVE-2016-2545, CVE-2016-2546, CVE-2016-2547, CVE-2016-2548, CVE-2016-2549, CVE-2016-3134
MD5 | 26e8b0517b51fdbb5c26817f7e4adb0a

Ubuntu Security Notice USN-2931-1

Change Mirror Download
Content-Disposition: inline

==========================================================================Ubuntu Security Notice USN-2931-1
March 14, 2016

linux-lts-utopic vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux-lts-utopic: Linux hardware enablement kernel from Utopic for Trusty

Details:

Ben Hawkes discovered that the Linux netfilter implementation did not
correctly perform validation when handling IPT_SO_SET_REPLACE events. A
local unprivileged attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code with administrative
privileges. (CVE-2016-3134)

It was discovered that the Linux kernel did not properly enforce rlimits
for file descriptors sent over UNIX domain sockets. A local attacker could
use this to cause a denial of service. (CVE-2013-4312)

It was discovered that a race condition existed when handling heartbeat-
timeout events in the SCTP implementation of the Linux kernel. A remote
attacker could use this to cause a denial of service. (CVE-2015-8767)

Andy Lutomirski discovered a race condition in the Linux kernel's
translation lookaside buffer (TLB) handling of flush events. A local
attacker could use this to cause a denial of service or possibly leak
sensitive information. (CVE-2016-2069)

Andrey Konovalov discovered that the ALSA USB MIDI driver incorrectly
performed a double-free. A local attacker with physical access could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code with administrative privileges. (CVE-2016-2384)

Dmitry Vyukov discovered that the Advanced Linux Sound Architecture (ALSA)
framework did not verify that a FIFO was attached to a client before
attempting to clear it. A local attacker could use this to cause a denial
of service (system crash). (CVE-2016-2543)

Dmitry Vyukov discovered that a race condition existed in the Advanced
Linux Sound Architecture (ALSA) framework between timer setup and closing
of the client, resulting in a use-after-free. A local attacker could use
this to cause a denial of service. (CVE-2016-2544)

Dmitry Vyukov discovered a race condition in the timer handling
implementation of the Advanced Linux Sound Architecture (ALSA) framework,
resulting in a use-after-free. A local attacker could use this to cause a
denial of service (system crash). (CVE-2016-2545)

Dmitry Vyukov discovered race conditions in the Advanced Linux Sound
Architecture (ALSA) framework's timer ioctls leading to a use-after-free. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2016-2546)

Dmitry Vyukov discovered that the Advanced Linux Sound Architecture (ALSA)
framework's handling of high resolution timers did not properly manage its
data structures. A local attacker could use this to cause a denial of
service (system hang or crash) or possibly execute arbitrary code.
(CVE-2016-2547, CVE-2016-2548)

Dmitry Vyukov discovered that the Advanced Linux Sound Architecture (ALSA)
framework's handling of high resolution timers could lead to a deadlock
condition. A local attacker could use this to cause a denial of service
(system hang). (CVE-2016-2549)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS:
linux-image-3.16.0-67-generic 3.16.0-67.87~14.04.1
linux-image-3.16.0-67-generic-lpae 3.16.0-67.87~14.04.1
linux-image-3.16.0-67-lowlatency 3.16.0-67.87~14.04.1
linux-image-3.16.0-67-powerpc-e500mc 3.16.0-67.87~14.04.1
linux-image-3.16.0-67-powerpc-smp 3.16.0-67.87~14.04.1
linux-image-3.16.0-67-powerpc64-emb 3.16.0-67.87~14.04.1
linux-image-3.16.0-67-powerpc64-smp 3.16.0-67.87~14.04.1

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
http://www.ubuntu.com/usn/usn-2931-1
CVE-2013-4312, CVE-2015-8767, CVE-2016-2069, CVE-2016-2384,
CVE-2016-2543, CVE-2016-2544, CVE-2016-2545, CVE-2016-2546,
CVE-2016-2547, CVE-2016-2548, CVE-2016-2549, CVE-2016-3134

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-67.87~14.04.1

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