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Ubuntu Security Notice USN-2748-1
September 28, 2015

linux vulnerabilities
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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:

Benjamin Randazzo discovered an information leak in the md (multiple
device) driver when the bitmap_info.file is disabled. A local privileged
attacker could use this to obtain sensitive information from the kernel.
(CVE-2015-5697)

Marc-Andr� Lureau discovered that the vhost driver did not properly
release the userspace provided log file descriptor. A privileged attacker
could use this to cause a denial of service (resource exhaustion).
(CVE-2015-6252)

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-3.13.0-65-generic 3.13.0-65.105
linux-image-3.13.0-65-generic-lpae 3.13.0-65.105
linux-image-3.13.0-65-lowlatency 3.13.0-65.105
linux-image-3.13.0-65-powerpc-e500 3.13.0-65.105
linux-image-3.13.0-65-powerpc-e500mc 3.13.0-65.105
linux-image-3.13.0-65-powerpc-smp 3.13.0-65.105
linux-image-3.13.0-65-powerpc64-emb 3.13.0-65.105
linux-image-3.13.0-65-powerpc64-smp 3.13.0-65.105

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-2748-1
CVE-2015-5697, CVE-2015-6252

Package Information:
https://launchpad.net/ubuntu/+source/linux/3.13.0-65.105

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