USN-1580-1: Linux kernel (OMAP4) vulnerabilities

Ubuntu Security Notice USN-1580-1

21st September, 2012

linux-ti-omap4 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 LTS

Summary

Several security issues were fixed in the kernel.

Software description

  • linux-ti-omap4 - Linux kernel for OMAP4

Details


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.
(CVE-2012-3430)

Mathias Krause discovered an information leak in the Linux kernel's TUN/TAP
device driver. A local user could exploit this flaw to examine part of the
kernel's stack memory. (CVE-2012-6547)

A flaw was discovered in the requeuing of futexes in the Linux kernel. A
local user could exploit this flaw to cause a denial of service (system
crash) or possibly have other unspecified impact. (CVE-2012-6647)

A flaw was found in Linux kernel's validation of CIPSO (Common IP Security
Option) options set from userspace. A local user that can set a socket's
CIPSO options could exploit this flaw to cause a denial of service (crash
the system). (CVE-2013-0310)

Update instructions

The problem can be corrected by updating your system to the following package version:

Ubuntu 12.04 LTS:
linux-image-3.2.0-1419-omap4 3.2.0-1419.26

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.

References

CVE-2012-3412, CVE-2012-3430, CVE-2012-6547, CVE-2012-6647, CVE-2013-0310