USN-2178-1: Linux kernel vulnerabilities
26 April 2014
Several security issues were fixed in the kernel.
Releases
Packages
- linux - Linux kernel
Details
A flaw was discovered in the Kernel Virtual Machine (KVM) subsystem of the
Linux kernel. A guest OS user could exploit this flaw to execute arbitrary
code on the host OS. (CVE-2014-0049)
Al Viro discovered an error in how CIFS in the Linux kernel handles
uncached write operations. An unprivileged local user could exploit this
flaw to cause a denial of service (system crash), obtain sensitive
information from kernel memory, or possibly gain privileges.
(CVE-2014-0069)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 12.10
-
linux-image-3.5.0-49-highbank
-
3.5.0-49.73
-
linux-image-3.5.0-49-powerpc-smp
-
3.5.0-49.73
-
linux-image-3.5.0-49-omap
-
3.5.0-49.73
-
linux-image-3.5.0-49-powerpc64-smp
-
3.5.0-49.73
-
linux-image-3.5.0-49-generic
-
3.5.0-49.73
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.