[USN-1700-2] Linux kernel (OMAP4) regression

John Johansen john.johansen at canonical.com
Fri Feb 1 15:17:01 UTC 2013


==========================================================================
Ubuntu Security Notice USN-1700-2
February 01, 2013

linux-ti-omap4 regression
==========================================================================

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

- Ubuntu 12.10

Summary:

USN-1700-1 introduced a regression in the Linux kernel.

Software Description:
- linux-ti-omap4: Linux kernel for OMAP4

Details:

USN-1700-1 fixed vulnerabilities in the Linux kernel. Due to an unrelated
regression inotify/fanotify stopped working after upgrading. This update
fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 A flaw was discovered in the Linux kernel's handling of script execution
 when module loading is enabled. A local attacker could exploit this flaw to
 cause a leak of kernel stack contents. (CVE-2012-4530)
 
 Florian Weimer discovered that hypervkvpd, which is distributed in the
 Linux kernel, was not correctly validating source addresses of netlink
 packets. An untrusted local user can cause a denial of service by causing
 hypervkvpd to exit. (CVE-2012-5532)

Update instructions:

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

Ubuntu 12.10:
  linux-image-3.5.0-218-omap4     3.5.0-218.26

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:
  http://www.ubuntu.com/usn/usn-1700-2
  http://www.ubuntu.com/usn/usn-1700-1
  https://launchpad.net/bugs//1101666

Package Information:
  https://launchpad.net/ubuntu/+source/linux-ti-omap4/3.5.0-218.26

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