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Ubuntu 12.04 LTS Advisory USN-3082-1 Critical: Admin Access Flaw

ubuntu
Calendar Grey September 19, 2016
Scroller Ubuntu
Problems within the Linux kernel on Ubuntu 12.04 LTS have resulted in potential unauthorized administrator access via certain security flaws.
The system could be made to run programs as an administrator.

Summary

The system could be made to run programs as an administrator.

Software Description:

- linux: Linux kernel

Details:

Chiachih Wu, Yuan-Tsung Lo, and Xuxian Jiang discovered that the legacy ABI

for ARM (OABI) had incomplete access checks for epoll_wait(2) and

semtimedop(2). A local attacker could use this to possibly execute

arbitrary code.

Topics%20covered

Topics Covered

security advisory critical Ubuntu update instructions local attack linux kernel administrator access

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-110-generic   3.2.0-110.151
  linux-image-3.2.0-110-generic-pae  3.2.0-110.151
  linux-image-3.2.0-110-highbank  3.2.0-110.151
  linux-image-3.2.0-110-omap      3.2.0-110.151
  linux-image-3.2.0-110-powerpc-smp  3.2.0-110.151
  linux-image-3.2.0-110-powerpc64-smp  3.2.0-110.151
  linux-image-3.2.0-110-virtual   3.2.0-110.151

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

CVE-2016-3857

Severity
critical
Lowest
Low
Medium
High
Critical

September 19, 2016

Topics%20covered

Topics Covered

security advisory critical Ubuntu update instructions local attack linux kernel administrator access

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-110.151

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