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Ubuntu 14.10: USN-2646-1 Critical: Linux Kernel Privilege Escalation

ubuntu
Calendar Grey June 15, 2015
Dist Ubuntu Esm H88
Fixing a security vulnerability in the Linux kernel on Ubuntu 14.10 that enables unauthorized elevation of administrative privileges.
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:

Philip Pettersson discovered a privilege escalation when using overlayfs

mounts inside of user namespaces. A local user could exploit this flaw to

gain administrative privileges on the system.

Topics%20covered

Topics Covered

security advisory privilege escalation Ubuntu update instructions linux kernel

Update Instructions

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

Ubuntu 14.10:
  linux-image-3.16.0-41-generic   3.16.0-41.55
  linux-image-3.16.0-41-generic-lpae  3.16.0-41.55
  linux-image-3.16.0-41-lowlatency  3.16.0-41.55
  linux-image-3.16.0-41-powerpc-e500mc  3.16.0-41.55
  linux-image-3.16.0-41-powerpc-smp  3.16.0-41.55
  linux-image-3.16.0-41-powerpc64-emb  3.16.0-41.55
  linux-image-3.16.0-41-powerpc64-smp  3.16.0-41.55

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. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

References

https://ubuntu.com/security/notices/USN-2646-1

CVE-2015-1328

Severity
critical
Lowest
Low
Medium
High
Critical

June 15, 2015

Topics%20covered

Topics Covered

security advisory privilege escalation Ubuntu update instructions linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux/3.16.0-41.55

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