[USN-2750-1] Linux kernel (Utopic HWE) vulnerability

[Steve Beattie]

==========================================================================
Ubuntu Security Notice USN-2750-1
September 29, 2015

linux-lts-utopic vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS

Summary:

The system could be made to crash or run programs as an administrator.

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

Details:

It was discovered that an integer overflow error existed in the SCSI
generic (sg) driver in the Linux kernel. A local attacker with write
permission to a SCSI generic device could use this to cause a denial of
service (system crash) or potentially escalate their privileges.

Update instructions:

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

Ubuntu 14.04 LTS:
  linux-image-3.16.0-50-generic   3.16.0-50.66~14.04.1
  linux-image-3.16.0-50-generic-lpae  3.16.0-50.66~14.04.1
  linux-image-3.16.0-50-lowlatency  3.16.0-50.66~14.04.1
  linux-image-3.16.0-50-powerpc-e500mc  3.16.0-50.66~14.04.1
  linux-image-3.16.0-50-powerpc-smp  3.16.0-50.66~14.04.1
  linux-image-3.16.0-50-powerpc64-emb  3.16.0-50.66~14.04.1
  linux-image-3.16.0-50-powerpc64-smp  3.16.0-50.66~14.04.1

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-2750-1
  CVE-2015-5707

Package Information:
  https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-50.66~14.04.1

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