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==========================================================================
Ubuntu Security Notice USN-2664-1
July 07, 2015

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

Details:

A race condition was discovered in the Linux kernel's file_handle size
verification. A local user could exploit this flaw to read potentially
sensative memory locations. (CVE-2015-1420)

A underflow error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4001)

A bounds check error was discovered in the Linux kernel's Ozmo Devices USB
over WiFi host controller driver. A remote attacker could exploit this flaw
to cause a denial of service (system crash) or potentially execute
arbitrary code via a specially crafted packet. (CVE-2015-4002)

A division by zero error was discovered in the Linux kernel's Ozmo Devices
USB over WiFi host controller driver. A remote attacker could exploit this
flaw to cause a denial of service (system crash). (CVE-2015-4003)

Carl H Lunde discovered missing sanity checks in the the Linux kernel's UDF
file system (CONFIG_UDF_FS). A local attacker could exploit this flaw to
cause a denial of service (system crash) by using a corrupted file system
image. (CVE-2015-4167)

Daniel Borkmann reported a kernel crash in the Linux kernel's BPF filter
JIT optimization. A local attacker could exploit this flaw to cause a
denial of service (system crash). (CVE-2015-4700)

Update instructions:

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

Ubuntu 14.04 LTS:
  linux-image-3.16.0-43-generic   3.16.0-43.58~14.04.1
  linux-image-3.16.0-43-generic-lpae  3.16.0-43.58~14.04.1
  linux-image-3.16.0-43-lowlatency  3.16.0-43.58~14.04.1
  linux-image-3.16.0-43-powerpc-e500mc  3.16.0-43.58~14.04.1
  linux-image-3.16.0-43-powerpc-smp  3.16.0-43.58~14.04.1
  linux-image-3.16.0-43-powerpc64-emb  3.16.0-43.58~14.04.1
  linux-image-3.16.0-43-powerpc64-smp  3.16.0-43.58~14.04.1

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References:
  http://www.ubuntu.com/usn/usn-2664-1
  CVE-2015-1420, CVE-2015-4001, CVE-2015-4002, CVE-2015-4003,
  CVE-2015-4167, CVE-2015-4700

Package Information:
  https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-43.58~14.04.1



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