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Ubuntu 12.04 LTS: USN-3051-1 Critical: Kernel DoS and Information Leak

ubuntu
Calendar Grey August 10, 2016
Scroller Ubuntu
Multiple vulnerabilities patched in the Ubuntu kernel, impacting LTS versions, accompanied by update guidelines and reboot steps included.
Several security issues were fixed in the kernel.

Summary

Several security issues were fixed in the kernel.

Software Description:

- linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise

Details:

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 implementation of

the Linux kernel. A local attacker could use this to obtain sensitive

information from kernel memory. (CVE-2016-5243)

Topics%20covered

Topics Covered

security advisory information leak critical DoS Ubuntu kernel

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.13.0-93-generic   3.13.0-93.140~precise1
  linux-image-3.13.0-93-generic-lpae  3.13.0-93.140~precise1

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-3051-1

CVE-2016-4470, CVE-2016-5243

Severity
critical
Lowest
Low
Medium
High
Critical

August 10, 2016

Topics%20covered

Topics Covered

security advisory information leak critical DoS Ubuntu kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-trusty/3.13.0-93.140~precise1

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