USN-2646-1: Linux kernel vulnerability
15 June 2015
The system could be made to run programs as an administrator.
Releases
Packages
- 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 versions:
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-powerpc64-emb
-
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-generic
-
3.16.0-41.55
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.