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Ubuntu 12.04 LTS: 3049-1 Critical: Kernel Denial of Service Threats

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Calendar Grey August 10, 2016
Scroller Ubuntu
Essential patch for Ubuntu 12.04 LTS targeting various kernel vulnerabilities to improve security and performance.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux: Linux kernel

Details:

Ben Hawkes discovered that the Linux netfilter implementation did not

correctly perform validation when handling IPT_SO_SET_REPLACE events. A

local unprivileged attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code with administrative

privileges. (CVE-2016-3134)

Vitaly Kuznetsov discovered that the Linux kernel did not properly suppress

hugetlbfs support in X86 paravirtualized guests. An attacker in the guest

OS could cause a denial of service (guest system crash). (CVE-2016-3961)

It was discovered that the keyring implementation in the Linux kernel did

not ensure a data structure was initialized before referencing it after an

error condition occurred. A local attacker could use this to cause a denial

of service (system crash). (CVE-2016-4470)

Kangjie Lu discovered an information leak in the netlink impl...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical threat kernel ubuntu

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-107-generic   3.2.0-107.148
  linux-image-3.2.0-107-generic-pae  3.2.0-107.148
  linux-image-3.2.0-107-highbank  3.2.0-107.148
  linux-image-3.2.0-107-omap      3.2.0-107.148
  linux-image-3.2.0-107-powerpc-smp  3.2.0-107.148
  linux-image-3.2.0-107-powerpc64-smp  3.2.0-107.148
  linux-image-3.2.0-107-virtual   3.2.0-107.148

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-3049-1

CVE-2016-3134, CVE-2016-3961, CVE-2016-4470, CVE-2016-5243

Severity
critical
Lowest
Low
Medium
High
Critical

August 10, 2016

Topics%20covered

Topics Covered

security advisory denial of service critical threat kernel ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-107.148

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