USN-1974-1: Linux kernel vulnerabilities
27 September 2013
Several security issues were fixed in the kernel.
Releases
Packages
- linux - Linux kernel
Details
Vince Weaver discovered a flaw in the perf subsystem of the Linux kernel on
ARM platforms. A local user could exploit this flaw to gain privileges or
cause a denial of service (system crash). (CVE-2013-4254)
A memory leak was discovered in the user namespace facility of the Linux
kernel. A local user could cause a denial of service (memory consumption)
via the CLONE_NEWUSER unshare call. (CVE-2013-4205)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 13.04
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
Related notices
- USN-1971-1: linux-lts-raring, linux-image-3.8.0-31-generic
- USN-1968-1: linux-image-3.2.0-54-generic-pae, linux-image-3.2.0-54-generic, linux, linux-image-3.2.0-54-powerpc-smp, linux-image-3.2.0-54-powerpc64-smp, linux-image-3.2.0-54-virtual, linux-image-3.2.0-54-highbank, linux-image-3.2.0-54-omap
- USN-1969-1: linux-ti-omap4, linux-image-3.2.0-1438-omap4
- USN-1973-1: linux-image-3.5.0-233-omap4, linux-ti-omap4
- USN-1970-1: linux-image-3.5.0-41-generic, linux-lts-quantal
- USN-1975-1: linux-image-3.5.0-233-omap4, linux-ti-omap4
- USN-1972-1: linux-image-3.5.0-41-powerpc-smp, linux, linux-image-3.5.0-41-powerpc64-smp, linux-image-3.5.0-41-generic, linux-image-3.5.0-41-omap, linux-image-3.5.0-41-highbank