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USN-2177-1: Linux kernel (Saucy HWE) vulnerabilities

26 April 2014

Several security issues were fixed in the kernel.




A flaw was discovered in the Kernel Virtual Machine (KVM) subsystem of the
Linux kernel. A guest OS user could exploit this flaw to execute arbitrary
code on the host OS. (CVE-2014-0049)

Al Viro discovered an error in how CIFS in the Linux kernel handles
uncached write operations. An unprivileged local user could exploit this
flaw to cause a denial of service (system crash), obtain sensitive
information from kernel memory, or possibly gain privileges.

Jouni Malinen reported a flaw in the handling of fragmentation in the
mac8Linux subsystem of the kernel. A remote attacker could exploit this
flaw to obtain potential sensitive cleartext information by reading
packets. (CVE-2014-8709)

Update instructions

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

Ubuntu 12.04

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.

Related notices

  • USN-2180-1: linux-ti-omap4, linux-image-3.5.0-241-omap4
  • USN-2175-1: linux-lts-quantal, linux-image-3.5.0-49-generic
  • USN-2181-1: linux-ti-omap4, linux-image-3.5.0-241-omap4
  • USN-2179-1: linux-image-3.11.0-20-generic, linux-image-3.11.0-20-generic-lpae, linux
  • USN-2176-1: linux-image-3.8.0-39-generic, linux-lts-raring
  • USN-2178-1: linux-image-3.5.0-49-highbank, linux-image-3.5.0-49-powerpc-smp, linux-image-3.5.0-49-powerpc64-smp, linux-image-3.5.0-49-omap, linux-image-3.5.0-49-generic, linux
  • USN-2221-1: linux-image-3.2.0-63-generic-pae, linux-image-3.2.0-63-powerpc-smp, linux-image-3.2.0-63-highbank, linux-image-3.2.0-63-powerpc64-smp, linux-image-3.2.0-63-omap, linux-image-3.2.0-63-generic, linux-image-3.2.0-63-virtual, linux
  • USN-2227-1: linux-ti-omap4, linux-image-3.2.0-1446-omap4
  • USN-2442-1: linux-image-2.6.32-374-ec2, linux-ec2
  • USN-2441-1: linux-image-2.6.32-70-386, linux-image-2.6.32-70-lpia, linux-image-2.6.32-70-ia64, linux-image-2.6.32-70-generic-pae, linux-image-2.6.32-70-powerpc64-smp, linux-image-2.6.32-70-powerpc-smp, linux-image-2.6.32-70-server, linux-image-2.6.32-70-virtual, linux-image-2.6.32-70-generic, linux-image-2.6.32-70-sparc64-smp, linux-image-2.6.32-70-versatile, linux-image-2.6.32-70-preempt, linux-image-2.6.32-70-powerpc, linux-image-2.6.32-70-sparc64, linux