USN-1567-1: Linux kernel vulnerabilities
Ubuntu Security Notice USN-1567-1
14th September, 2012
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.04
Several security issues were fixed in the kernel.
- linux - Linux kernel
A flaw was found in how the Linux kernel passed the replacement session
keyring to a child process. An unprivileged local user could exploit this
flaw to cause a denial of service (panic). (CVE-2012-2745)
Ben Hutchings reported a flaw in the Linux kernel with some network drivers
that support TSO (TCP segment offload). A local or peer user could exploit
this flaw to to cause a denial of service. (CVE-2012-3412)
Jay Fenlason and Doug Ledford discovered a bug in the Linux kernel
implementation of RDS sockets. A local unprivileged user could potentially
use this flaw to read privileged information from the kernel.
A flaw was discovered in the madvise feature of the Linux kernel's memory
subsystem. An unprivileged local use could exploit the flaw to cause a
denial of service (crash the system). (CVE-2012-3511)
The problem can be corrected by updating your system to the following package version:
- Ubuntu 11.04:
- linux-image-2.6.38-16-omap 2.6.38-16.67
- linux-image-2.6.38-16-powerpc-smp 2.6.38-16.67
- linux-image-2.6.38-16-versatile 2.6.38-16.67
- linux-image-2.6.38-16-server 2.6.38-16.67
- linux-image-2.6.38-16-powerpc64-smp 2.6.38-16.67
- linux-image-2.6.38-16-generic-pae 2.6.38-16.67
- linux-image-2.6.38-16-generic 2.6.38-16.67
- linux-image-2.6.38-16-virtual 2.6.38-16.67
- linux-image-2.6.38-16-powerpc 2.6.38-16.67
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
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.