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Ubuntu 14.04 LTS USN-2969-1: Critical Kernel DoS Issues

ubuntu
Calendar Grey May 9, 2016
Scroller Ubuntu
Uncover essential updates for Ubuntu 14.04 LTS targeting severe kernel flaws that threaten overall system reliability.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-utopic: Linux hardware enablement kernel from Utopic for Trusty

Details:

Ralf Spenneberg discovered that the Aiptek Tablet USB device driver in the

Linux kernel did not properly sanity check the endpoints reported by the

device. An attacker with physical access could cause a denial of service

(system crash). (CVE-2015-7515)

Ben Hawkes discovered that the Linux kernel's AIO interface allowed single

writes greater than 2GB, which could cause an integer overflow when writing

to certain filesystems, socket or device types. A local attacker could this

to cause a denial of service (system crash) or possibly execute arbitrary

code. (CVE-2015-8830)

Zach Riggle discovered that the Linux kernel's list poison feature did not

take into account the mmap_min_addr value. A local attacker could use this

to bypass the kernel's poison-pointer protection mechanism while attempting

to exploit an existing kernel vu...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory access control kernel ubuntu system crash dos linux-lts-utopic

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.16.0-71-generic   3.16.0-71.91~14.04.1
  linux-image-3.16.0-71-generic-lpae  3.16.0-71.91~14.04.1
  linux-image-3.16.0-71-lowlatency  3.16.0-71.91~14.04.1
  linux-image-3.16.0-71-powerpc-e500mc  3.16.0-71.91~14.04.1
  linux-image-3.16.0-71-powerpc-smp  3.16.0-71.91~14.04.1
  linux-image-3.16.0-71-powerpc64-emb  3.16.0-71.91~14.04.1
  linux-image-3.16.0-71-powerpc64-smp  3.16.0-71.91~14.04.1

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.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-2969-1

CVE-2015-7515, CVE-2015-8830, CVE-2016-0821, CVE-2016-2184,

CVE-2016-2185, CVE-2016-2186, CVE-2016-2188, CVE-2016-3138,

CVE-2016-3156, CVE-2016-3157

Severity
critical
Lowest
Low
Medium
High
Critical

May 09, 2016

Topics%20covered

Topics Covered

security advisory access control kernel ubuntu system crash dos linux-lts-utopic

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-71.91~14.04.1

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