Ubuntu 14.04 LTS USN-2524-1 Moderate: eCryptfs Access Issue

ubuntu

March 11, 2015

Sensitive information in encrypted home and Private directories could beexposed if an attacker gained access to your files.

Summary

Sensitive information in encrypted home and Private directories could be

exposed if an attacker gained access to your files.

Software Description:

- ecryptfs-utils: eCryptfs cryptographic filesystem utilities

Details:

Sylvain Pelissier discovered that eCryptfs did not generate a random salt when

encrypting the mount passphrase with the login password. An attacker could use

this issue to discover the login password used to protect the mount passphrase

and gain unintended access to the encrypted files.

Topics Covered

security advisory moderate ubuntu encrypted files ecryptfs access exposure

Update Instructions

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

Ubuntu 14.10:
  ecryptfs-utils                  104-0ubuntu1.14.10.3
  libecryptfs0                    104-0ubuntu1.14.10.3

Ubuntu 14.04 LTS:
  ecryptfs-utils                  104-0ubuntu1.14.04.3
  libecryptfs0                    104-0ubuntu1.14.04.3

Ubuntu 12.04 LTS:
  ecryptfs-utils                  96-0ubuntu3.4
  libecryptfs0                    96-0ubuntu3.4

Ubuntu 10.04 LTS:
  ecryptfs-utils                  83-0ubuntu3.2.10.04.6
  libecryptfs0                    83-0ubuntu3.2.10.04.6

After a standard system update you need to log out of all sessions and then log
back in to make all the necessary changes.