USN-2646-1: Linux kernel vulnerability
Ubuntu Security Notice USN-2646-1
15th June, 2015
linux vulnerability
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 14.10
Summary
The system could be made to run programs as an administrator.
Software description
- linux - Linux kernel
Details
Philip Pettersson discovered a privilege escalation when using overlayfs
mounts inside of user namespaces. A local user could exploit this flaw to
gain administrative privileges on the system.
Update instructions
The problem can be corrected by updating your system to the following package version:
- Ubuntu 14.10:
- linux-image-3.16.0-41-powerpc-smp 3.16.0-41.55
- linux-image-3.16.0-41-powerpc64-smp 3.16.0-41.55
- linux-image-3.16.0-41-generic 3.16.0-41.55
- linux-image-3.16.0-41-powerpc-e500mc 3.16.0-41.55
- linux-image-3.16.0-41-generic-lpae 3.16.0-41.55
- linux-image-3.16.0-41-lowlatency 3.16.0-41.55
- linux-image-3.16.0-41-powerpc64-emb 3.16.0-41.55
To update your system, please follow these instructions: http://ift.tt/17VXqjU.
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
from Ubuntu Security Notices http://ift.tt/1IgGSRk