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Alerts This Week
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Ubuntu 12.04 LTS USN-3104-1 Critical: Kernel Privilege Escalation

ubuntu
Calendar Grey October 20, 2016
Scroller Ubuntu
Ubuntu Security Alert USN-3104-1 concerns a critical kernel vulnerability that enables execution of programs with administrative privileges. Immediate response is essential!
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:

It was discovered that a race condition existed in the memory manager of

the Linux kernel when handling copy-on-write breakage of private read-only

memory mappings. A local attacker could use this to gain administrative

privileges.

Topics%20covered

Topics Covered

security advisory critical race condition kernel ubuntu administrative access

Update Instructions

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

Ubuntu 12.04 LTS:
  linux-image-3.2.0-113-generic   3.2.0-113.155
  linux-image-3.2.0-113-generic-pae  3.2.0-113.155
  linux-image-3.2.0-113-highbank  3.2.0-113.155
  linux-image-3.2.0-113-omap      3.2.0-113.155
  linux-image-3.2.0-113-powerpc-smp  3.2.0-113.155
  linux-image-3.2.0-113-powerpc64-smp  3.2.0-113.155
  linux-image-3.2.0-113-virtual   3.2.0-113.155

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-3104-1

CVE-2016-5195

Severity
critical
Lowest
Low
Medium
High
Critical

October 20, 2016

Topics%20covered

Topics Covered

security advisory critical race condition kernel ubuntu administrative access

Package Information

https://launchpad.net/ubuntu/+source/linux/3.2.0-113.155

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