=========================================================================Ubuntu Security Notice USN-2799-1
November 05, 2015

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

- Ubuntu 15.04

Summary:

Several security issues were fixed in the kernel.

Software Description:
- linux: Linux kernel

Details:

It was discovered that in certain situations, a directory could be renamed
outside of a bind mounted location. An attacker could use this to escape
bind mount containment and gain access to sensitive information.
(CVE-2015-2925)

Moein Ghasemzadeh discovered that the USB WhiteHEAT serial driver contained
hardcoded attributes about the USB devices. An attacker could construct a
fake WhiteHEAT USB device that, when inserted, causes a denial of service
(system crash). (CVE-2015-5257)

Update instructions:

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

Ubuntu 15.04:
  linux-image-3.19.0-32-generic   3.19.0-32.37
  linux-image-3.19.0-32-generic-lpae  3.19.0-32.37
  linux-image-3.19.0-32-lowlatency  3.19.0-32.37
  linux-image-3.19.0-32-powerpc-e500mc  3.19.0-32.37
  linux-image-3.19.0-32-powerpc-smp  3.19.0-32.37
  linux-image-3.19.0-32-powerpc64-emb  3.19.0-32.37
  linux-image-3.19.0-32-powerpc64-smp  3.19.0-32.37

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:
  https://ubuntu.com/security/notices/USN-2799-1
  CVE-2015-2925, CVE-2015-5257

Package Information:
  https://launchpad.net/ubuntu/+source/linux/3.19.0-32.37