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AUSCERT External Security Bulletin Redistribution
7 August 2018
AusCERT Security Bulletin Summary
Operating System: Ubuntu
Impact/Access: Access Confidential Data -- Existing Account
CVE Names: CVE-2018-6556
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running lxc check for an updated version of the software for their
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USN-3730-1: LXC vulnerability
6 August 2018
A security issue affects these releases of Ubuntu and its derivatives:
Ubuntu 18.04 LTS
LXC would allow unintended access to files.
lxc - Linux Containers userspace tools
Matthias Gerstner discovered that LXC incorrectly handled the lxc-user-nic
utility. A local attacker could possibly use this issue to open arbitrary
The problem can be corrected by updating your system to the following package
Ubuntu 18.04 LTS
lxc - 3.0.1-0ubuntu1~18.04.2
To update your system, please follow these instructions:
After a standard system update you need to restart LXC containers to make all
the necessary changes.
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