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Ubuntu 14.04 LTS USN-2645-1 Critical: Privilege Escalation Threat

ubuntu
Calendar Grey June 15, 2015
Dist Ubuntu Esm H88
Critical: Upgrade Ubuntu 14.04 LTS immediately to address the security vulnerabilities outlined in USN-2645-1.
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-lts-vivid: Linux hardware enablement kernel from Vivid

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 critical software update privilege escalation threat ubuntu linux-lts-vivid

Update Instructions

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

Ubuntu 14.04 LTS:
  linux-image-3.19.0-21-generic   3.19.0-21.21~14.04.1
  linux-image-3.19.0-21-generic-lpae  3.19.0-21.21~14.04.1
  linux-image-3.19.0-21-lowlatency  3.19.0-21.21~14.04.1
  linux-image-3.19.0-21-powerpc-e500mc  3.19.0-21.21~14.04.1
  linux-image-3.19.0-21-powerpc-smp  3.19.0-21.21~14.04.1
  linux-image-3.19.0-21-powerpc64-emb  3.19.0-21.21~14.04.1
  linux-image-3.19.0-21-powerpc64-smp  3.19.0-21.21~14.04.1

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-2645-1

CVE-2015-1328

Severity
critical
Lowest
Low
Medium
High
Critical

June 15, 2015

Topics%20covered

Topics Covered

security advisory critical software update privilege escalation threat ubuntu linux-lts-vivid

Package Information

https://launchpad.net/ubuntu/+source/linux-lts-vivid/3.19.0-21.21~14.04.1

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