Home / mailings [USN-3221-1] Linux kernel vulnerability
Posted on 08 March 2017
Ubuntu Security--===============7237764545584446480==
Content-Type: multipart/signed; micalg=pgp-sha512;
protocol="application/pgp-signature"; boundary="0OWHXb1mYLuhj1Ox"
Content-Disposition: inline
--0OWHXb1mYLuhj1Ox
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
==========================================================================
Ubuntu Security Notice USN-3221-1
March 08, 2017
linux, linux-raspi2 vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.10
Summary:
The system could be made to crash or run programs as an administrator.
Software Description:
- linux: Linux kernel
- linux-raspi2: Linux kernel for Raspberry Pi 2
Details:
Alexander Popov discovered that the N_HDLC line discipline implementation
in the Linux kernel contained a double-free vulnerability. A local attacker
could use this to cause a denial of service (system crash) or possibly gain
administrative privileges.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.10:
linux-image-4.8.0-1028-raspi2 4.8.0-1028.31
linux-image-4.8.0-41-generic 4.8.0-41.44
linux-image-4.8.0-41-generic-lpae 4.8.0-41.44
linux-image-4.8.0-41-lowlatency 4.8.0-41.44
linux-image-4.8.0-41-powerpc-e500mc 4.8.0-41.44
linux-image-4.8.0-41-powerpc-smp 4.8.0-41.44
linux-image-4.8.0-41-powerpc64-emb 4.8.0-41.44
linux-image-generic 4.8.0.41.52
linux-image-generic-lpae 4.8.0.41.52
linux-image-lowlatency 4.8.0.41.52
linux-image-powerpc-e500mc 4.8.0.41.52
linux-image-powerpc-smp 4.8.0.41.52
linux-image-powerpc64-emb 4.8.0.41.52
linux-image-raspi2 4.8.0.1028.31
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-3221-1
CVE-2017-2636
Package Information:
https://launchpad.net/ubuntu/+source/linux/4.8.0-41.44
https://launchpad.net/ubuntu/+source/linux-raspi2/4.8.0-1028.31
