USN-2931-1: Linux kernel (Utopic HWE) vulnerabilities

14 March 2016

Several security issues were fixed in the kernel.

Releases

Packages

  • 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

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.

Related notices

  • USN-2908-1: linux-image-4.2.0-30-powerpc-smp, linux-image-4.2.0-30-generic, linux-image-4.2.0-30-powerpc64-emb, linux-image-4.2.0-30-powerpc-e500mc, linux-image-4.2.0-30-generic-lpae, linux-image-4.2.0-30-lowlatency, linux, linux-image-4.2.0-30-powerpc64-smp
  • USN-2908-2: linux-lts-wily, linux-image-4.2.0-30-powerpc-smp, linux-image-4.2.0-30-generic, linux-image-4.2.0-30-powerpc64-emb, linux-image-4.2.0-30-powerpc-e500mc, linux-image-4.2.0-30-generic-lpae, linux-image-4.2.0-30-lowlatency, linux-image-4.2.0-30-powerpc64-smp
  • USN-2908-3: linux-raspi2, linux-image-4.2.0-1025-raspi2
  • USN-2928-1: linux-image-3.2.0-101-virtual, linux-image-3.2.0-101-generic-pae, linux-image-3.2.0-101-powerpc-smp, linux-image-3.2.0-101-omap, linux, linux-image-3.2.0-101-highbank, linux-image-3.2.0-101-generic, linux-image-3.2.0-101-powerpc64-smp
  • USN-2928-2: linux-image-3.2.0-1479-omap4, linux-ti-omap4
  • USN-2929-1: linux-image-3.13.0-83-generic, linux-image-3.13.0-83-powerpc64-smp, linux-image-3.13.0-83-powerpc64-emb, linux-image-3.13.0-83-lowlatency, linux-image-3.13.0-83-powerpc-e500mc, linux-image-3.13.0-83-powerpc-e500, linux, linux-image-3.13.0-83-powerpc-smp, linux-image-3.13.0-83-generic-lpae
  • USN-2929-2: linux-lts-trusty, linux-image-3.13.0-83-generic-lpae, linux-image-3.13.0-83-generic
  • USN-2930-1: linux-image-4.2.0-34-lowlatency, linux-image-4.2.0-34-powerpc-e500mc, linux-image-4.2.0-34-generic, linux-image-4.2.0-34-powerpc64-emb, linux, linux-image-4.2.0-34-generic-lpae, linux-image-4.2.0-34-powerpc64-smp, linux-image-4.2.0-34-powerpc-smp
  • USN-2930-2: linux-image-4.2.0-34-lowlatency, linux-image-4.2.0-34-powerpc-e500mc, linux-lts-wily, linux-image-4.2.0-34-generic, linux-image-4.2.0-34-powerpc64-emb, linux-image-4.2.0-34-generic-lpae, linux-image-4.2.0-34-powerpc64-smp, linux-image-4.2.0-34-powerpc-smp
  • USN-2930-3: linux-raspi2, linux-image-4.2.0-1027-raspi2
  • USN-2932-1: linux-image-3.19.0-56-powerpc-smp, linux-image-3.19.0-56-powerpc64-emb, linux-image-3.19.0-56-powerpc64-smp, linux-lts-vivid, linux-image-3.19.0-56-generic-lpae, linux-image-3.19.0-56-generic, linux-image-3.19.0-56-powerpc-e500mc, linux-image-3.19.0-56-lowlatency
  • USN-2967-1: linux-image-3.2.0-102-powerpc-smp, linux-image-3.2.0-102-highbank, linux-image-3.2.0-102-generic, linux-image-3.2.0-102-generic-pae, linux-image-3.2.0-102-omap, linux-image-3.2.0-102-virtual, linux, linux-image-3.2.0-102-powerpc64-smp
  • USN-2967-2: linux-image-3.2.0-1480-omap4, linux-ti-omap4
  • USN-2989-1: linux-image-3.13.0-87-powerpc-e500, linux-image-3.13.0-87-generic, linux-image-3.13.0-87-powerpc-smp, linux-image-3.13.0-87-powerpc64-smp, linux-image-3.13.0-87-powerpc-e500mc, linux, linux-image-3.13.0-87-generic-lpae, linux-image-3.13.0-87-powerpc64-emb, linux-image-3.13.0-87-lowlatency
  • USN-2998-1: linux-image-3.13.0-88-generic-lpae, linux-image-3.13.0-88-generic, linux-lts-trusty
  • USN-3049-1: linux-image-3.2.0-107-omap, linux-image-3.2.0-107-highbank, linux-image-3.2.0-107-generic-pae, linux-image-3.2.0-107-powerpc64-smp, linux-image-3.2.0-107-powerpc-smp, linux-image-3.2.0-107-virtual, linux, linux-image-3.2.0-107-generic
  • USN-3050-1: linux-image-3.2.0-1485-omap4, linux-ti-omap4
  • USN-3083-1: linux-image-3.13.0-96-powerpc64-emb, linux-image-3.13.0-96-powerpc-e500, linux-image-3.13.0-96-generic-lpae, linux-image-3.13.0-96-powerpc64-smp, linux-image-3.13.0-96-lowlatency, linux-image-3.13.0-96-generic, linux, linux-image-3.13.0-96-powerpc-e500mc, linux-image-3.13.0-96-powerpc-smp
  • USN-3083-2: linux-image-3.13.0-96-generic-lpae, linux-image-3.13.0-96-generic, linux-lts-trusty