[USN-2415-1] Linux kernel vulnerability

John Johansen john.johansen at canonical.com
Tue Nov 25 04:12:32 UTC 2014


==========================================================================
Ubuntu Security Notice USN-2415-1
November 25, 2014

linux vulnerability
==========================================================================

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

- Ubuntu 10.04 LTS

Summary:

The system could be made to deny write access to files.

Software Description:
- linux: Linux kernel

Details:

Andy Lutomirski discovered that the Linux kernel was not checking the
CAP_SYS_ADMIN when remounting filesystems to read-only. A local user could
exploit this flaw to cause a denial of service (loss of writability).

Update instructions:

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

Ubuntu 10.04 LTS:
  linux-image-2.6.32-68-386       2.6.32-68.135
  linux-image-2.6.32-68-generic   2.6.32-68.135
  linux-image-2.6.32-68-generic-pae  2.6.32-68.135
  linux-image-2.6.32-68-ia64      2.6.32-68.135
  linux-image-2.6.32-68-lpia      2.6.32-68.135
  linux-image-2.6.32-68-powerpc   2.6.32-68.135
  linux-image-2.6.32-68-powerpc-smp  2.6.32-68.135
  linux-image-2.6.32-68-powerpc64-smp  2.6.32-68.135
  linux-image-2.6.32-68-preempt   2.6.32-68.135
  linux-image-2.6.32-68-server    2.6.32-68.135
  linux-image-2.6.32-68-sparc64   2.6.32-68.135
  linux-image-2.6.32-68-sparc64-smp  2.6.32-68.135
  linux-image-2.6.32-68-versatile  2.6.32-68.135
  linux-image-2.6.32-68-virtual   2.6.32-68.135

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-2415-1
  CVE-2014-7975

Package Information:
  https://launchpad.net/ubuntu/+source/linux/2.6.32-68.135


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