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Ubuntu Security Notice USN-2857-2

Posted on 07 January 2016
Source : packetstormsecurity.org Link

 

==========================================================================
Ubuntu Security Notice USN-2857-2
January 05, 2016

linux-lts-vivid vulnerability
==========================================================================

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

- Ubuntu 14.04 LTS

Summary:

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

Software Description:
- linux-lts-vivid: Linux hardware enablement kernel from Vivid

Details:

Nathan Williams discovered that overlayfs in the Linux kernel incorrectly
handled setattr operations. A local unprivileged attacker could use this to
create files with administrative permission attributes and execute
arbitrary code with elevated privileges.

Update instructions:

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

Ubuntu 14.04 LTS:
linux-image-3.19.0-43-generic 3.19.0-43.49~14.04.1
linux-image-3.19.0-43-generic-lpae 3.19.0-43.49~14.04.1
linux-image-3.19.0-43-lowlatency 3.19.0-43.49~14.04.1
linux-image-3.19.0-43-powerpc-e500mc 3.19.0-43.49~14.04.1
linux-image-3.19.0-43-powerpc-smp 3.19.0-43.49~14.04.1
linux-image-3.19.0-43-powerpc64-emb 3.19.0-43.49~14.04.1
linux-image-3.19.0-43-powerpc64-smp 3.19.0-43.49~14.04.1

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References:
http://www.ubuntu.com/usn/usn-2857-2
http://www.ubuntu.com/usn/usn-2857-1
CVE-2015-8660

Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-43.49~14.04.1

 

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