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==========================================================================
Ubuntu Security Notice USN-2290-1
July 17, 2014

linux 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: Linux kernel

Details:

Sasha Levin reported a flaw in the Linux kernel's point-to-point protocol
(PPP) when used with the Layer Two Tunneling Protocol (L2TP). A local user
could exploit this flaw to gain administrative privileges. (CVE-2014-4943)

Salva Peiró discovered an information leak in the Linux kernel's media-
device driver. A local attacker could exploit this flaw to obtain sensitive
information from kernel memory. (CVE-2014-1739)

A bounds check error was discovered in the socket filter subsystem of the
Linux kernel. A local user could exploit this flaw to cause a denial of
service (system crash) via crafted BPF instructions. (CVE-2014-3144)

A remainder calculation error was discovered in the socket filter subsystem
of the Linux kernel. A local user could exploit this flaw to cause a denial
of service (system crash) via crafted BPF instructions. (CVE-2014-3145)

A flaw was discovered in the Linux kernel's handling of hugetlb entries. A
local user could exploit this flaw to cause a denial service (memory
corruption or system crash). (CVE-2014-3940)

Don Bailey discovered a flaw in the LZO decompress algorithm used by the
Linux kernel. An attacker could exploit this flaw to cause a denial of
service (memory corruption or OOPS). (CVE-2014-4608)

Don Bailey and Ludvig Strigeus discovered an integer overflow in the Linux
kernel's implementation of the LZ4 decompression algorithm, when used by
code not complying with API limitations. An attacker could exploit this
flaw to cause a denial of service (memory corruption) or possibly other
unspecified impact. (CVE-2014-4611)

Update instructions:

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

Ubuntu 14.04 LTS:
  linux-image-3.13.0-32-generic   3.13.0-32.57
  linux-image-3.13.0-32-generic-lpae  3.13.0-32.57
  linux-image-3.13.0-32-lowlatency  3.13.0-32.57
  linux-image-3.13.0-32-powerpc-e500  3.13.0-32.57
  linux-image-3.13.0-32-powerpc-e500mc  3.13.0-32.57
  linux-image-3.13.0-32-powerpc-smp  3.13.0-32.57
  linux-image-3.13.0-32-powerpc64-emb  3.13.0-32.57
  linux-image-3.13.0-32-powerpc64-smp  3.13.0-32.57

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-2290-1
  CVE-2014-1739, CVE-2014-3144, CVE-2014-3145, CVE-2014-3940,
  CVE-2014-4608, CVE-2014-4611, CVE-2014-4943

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.13.0-32.57



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