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Ubuntu Security Notice USN-2988-1
May 31, 2016
lxd vulnerabilities
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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 versions:
Ubuntu 16.04 LTS:
lxd 2.0.2-0ubuntu1~16.04.1
Ubuntu 15.10:
lxd 0.20-0ubuntu4.2
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-2988-1
CVE-2016-1581, CVE-2016-1582
Package Information:
https://launchpad.net/ubuntu/+source/lxd/2.0.2-0ubuntu1~16.04.1
https://launchpad.net/ubuntu/+source/lxd/0.20-0ubuntu4.2
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