Ubuntu 15.10 USN-2876-1: Moderate eCryptfs Program Escalation

ubuntu

January 20, 2016

mount.ecryptfs_private could be used to run programs as an administrator.

Summary

mount.ecryptfs_private could be used to run programs as an administrator.

Software Description:

- ecryptfs-utils: eCryptfs cryptographic filesystem utilities

Details:

Jann Horn discovered that mount.ecryptfs_private would mount over certain

directories in the proc filesystem. A local attacker could use this to escalate

their privileges. (CVE-2016-1572)

Topics Covered

security advisory moderate vulnerability local attack ubuntu ecryptfs program escalation

Update Instructions

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

Ubuntu 15.10:
  ecryptfs-utils                  108-0ubuntu1.1

Ubuntu 15.04:
  ecryptfs-utils                  107-0ubuntu1.3

Ubuntu 14.04 LTS:
  ecryptfs-utils                  104-0ubuntu1.14.04.4

Ubuntu 12.04 LTS:
  ecryptfs-utils                  96-0ubuntu3.5

In general, a standard system update will make all the necessary changes.