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Ubuntu 12.04 LTS USN-2356-1 Critical: Kernel Denial Of Service Threat

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Calendar Grey September 23, 2014
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Several updates for Ubuntu 12.04 LTS kernel security issues fixed. Ensure systems are updated to mitigate DoS threats.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Jack Morgenstein reported a flaw in the page handling of the KVM (Kerenl

Virtual Machine) subsystem in the Linux kernel. A guest OS user could

exploit this flaw to cause a denial of service (host OS memory corruption)

or possibly have other unspecified impact on the host OS. (CVE-2014-3601)

Chris Evans reported an flaw in the Linux kernel's handling of iso9660

(compact disk filesystem) images. An attacker who can mount a custom

iso9660 image either via a CD/DVD drive or a loopback mount could cause a

denial of service (system crash or reboot). (CVE-2014-5471)

Chris Evans reported an flaw in the Linux kernel's handling of iso9660

(compact disk filesystem) images. An attacker who can mount a custom

iso9660 image, with a self-referential CL entry, either via a CD/DVD drive

or a loopback mount could cause a denial of service (unkillable mount

process). (CVE-...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory security issue kernel system update ubuntu linux dos

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-69-generic    3.2.0-69.103
  linux-image-3.2.0-69-generic-pae  3.2.0-69.103
  linux-image-3.2.0-69-highbank   3.2.0-69.103
  linux-image-3.2.0-69-omap       3.2.0-69.103
  linux-image-3.2.0-69-powerpc-smp  3.2.0-69.103
  linux-image-3.2.0-69-powerpc64-smp  3.2.0-69.103
  linux-image-3.2.0-69-virtual    3.2.0-69.103

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

https://ubuntu.com/security/notices/USN-2356-1

CVE-2014-3601, CVE-2014-5471, CVE-2014-5472

Severity
critical
Lowest
Low
Medium
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Critical

September 23, 2014

Topics%20covered

Topics Covered

security advisory security issue kernel system update ubuntu linux dos

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-69.103

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