Home / mailings [USN-3220-3] Linux kernel (AWS) vulnerability
Posted on 09 March 2017
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==========================================================================
Ubuntu Security Notice USN-3220-3
March 09, 2017
linux-aws vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
Summary:
The system could be made to crash or run programs as an administrator.
Software Description:
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
Details:
USN-3220-1 fixed a vulnerability in the Linux kernel. This update
provides the corresponding updates for the Linux kernel for Amazon
Web Services (AWS).
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 16.04 LTS:
linux-image-4.4.0-1007-aws 4.4.0-1007.16
linux-image-aws 4.4.0.1007.8
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-3220-3
http://www.ubuntu.com/usn/usn-3220-1
CVE-2017-2636
Package Information:
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1007.16
