Ubuntu Security Notice USN-2876-1
20th 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 version:
- 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.