[USN-3730-1] LXC vulnerability


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From: Marc Deslauriers
Reply-To: Ubuntu Security
To: ubuntu-security-announce@lists.ubuntu.com
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Subject: [USN-3730-1] LXC vulnerability

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Ubuntu Security Notice USN-3730-1
August 06, 2018

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

– Ubuntu 18.04 LTS

Summary:

LXC would allow unintended access to files.

Software Description:
– lxc: Linux Containers userspace tools

Details:

Matthias Gerstner discovered that LXC incorrectly handled the lxc-user-ni=
c
utility. A local attacker could possibly use this issue to open arbitrary=

files.

Update instructions:

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

Ubuntu 18.04 LTS:
lxc 3.0.1-0ubuntu1~18.04.2

After a standard system update you need to restart LXC containers to make=

all the necessary changes.

References:
https://usn.ubuntu.com/usn/usn-3730-1
CVE-2018-6556

Package Information:
https://launchpad.net/ubuntu/+source/lxc/3.0.1-0ubuntu1~18.04.2

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