Home / mailings [USN-2858-2] Linux kernel (Wily HWE) vulnerability
Posted on 05 January 2016
Ubuntu Security--===============5942986290166619398==
Content-Type: multipart/signed; micalg=pgp-sha512;
protocol="application/pgp-signature"; boundary="FWibJpkbnkY6rrXF"
Content-Disposition: inline
--FWibJpkbnkY6rrXF
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
==========================================================================
Ubuntu Security Notice USN-2858-2
January 05, 2016
linux-lts-wily 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-wily: Linux hardware enablement kernel from Wily
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-4.2.0-23-generic 4.2.0-23.28~14.04.1
linux-image-4.2.0-23-generic-lpae 4.2.0-23.28~14.04.1
linux-image-4.2.0-23-lowlatency 4.2.0-23.28~14.04.1
linux-image-4.2.0-23-powerpc-e500mc 4.2.0-23.28~14.04.1
linux-image-4.2.0-23-powerpc-smp 4.2.0-23.28~14.04.1
linux-image-4.2.0-23-powerpc64-emb 4.2.0-23.28~14.04.1
linux-image-4.2.0-23-powerpc64-smp 4.2.0-23.28~14.04.1
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-2858-2
http://www.ubuntu.com/usn/usn-2858-1
CVE-2015-8660
Package Information:
https://launchpad.net/ubuntu/+source/linux-lts-wily/4.2.0-23.28~14.04.1
