USN-2876-1: eCryptfs vulnerability

20 January 2016

ecryptfs-utils vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 15.10
  • Ubuntu 15.04
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS

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)

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

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References