Ubuntu Security Notice USN-2988-1
31st May, 2016
lxd vulnerabilities
A security issue affects these releases of Ubuntu and its
derivatives:
- Ubuntu 16.04 LTS
- Ubuntu 15.10
Summary
Several security issues were fixed in LXD.
Software description
- lxd
- Container hypervisor based on LXC
Details
Robie Basak discovered that LXD incorrectly set permissions when setting up
a loop based ZFS pool. A local attacker could use this issue to copy and
read the data of any LXD container. (CVE-2016-1581)
Robie Basak discovered that LXD incorrectly set permissions when switching
an unprivileged container into privileged mode. A local attacker could use
this issue to access any world readable path in the container directory,
including setuid binaries. (CVE-2016-1582)
Update instructions
The problem can be corrected by updating your system to the following
package version:
- Ubuntu 16.04 LTS:
lxd
2.0.2-0ubuntu1~16.04.1
- Ubuntu 15.10:
lxd
0.20-0ubuntu4.2
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.