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AUSCERT External Security Bulletin Redistribution
ESB-2017.0622
LXC vulnerability
10 March 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: lxc-common
Publisher: Ubuntu
Operating System: Ubuntu
Linux variants
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-5985
Original Bulletin:
http://www.ubuntu.com/usn/usn-3224-1
Comment: This advisory references vulnerabilities in products which run on
platforms other than Ubuntu. It is recommended that administrators
running lxc-common check for an updated version of the software for
their operating system.
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Ubuntu Security Notice USN-3224-1
March 09, 2017
lxc vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:
- - Ubuntu 16.10
- - Ubuntu 16.04 LTS
- - Ubuntu 14.04 LTS
Summary:
LXC could be made to create arbitrary virtual network interfaces as an
administrator.
Software Description:
- - lxc: Linux Containers userspace tools
Details:
Jann Horn discovered that LXC incorrectly verified permissions when creating
virtual network interfaces. A local attacker could possibly use this issue to
create virtual network interfaces in network namespaces that they do not own.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.10:
lxc-common 2.0.7-0ubuntu1~16.10.2
Ubuntu 16.04 LTS:
lxc-common 2.0.7-0ubuntu1~16.04.2
Ubuntu 14.04 LTS:
lxc 1.0.9-0ubuntu3
In general, a standard system update will make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-3224-1
CVE-2017-5985
Package Information:
https://launchpad.net/ubuntu/+source/lxc/2.0.7-0ubuntu1~16.10.2
https://launchpad.net/ubuntu/+source/lxc/2.0.7-0ubuntu1~16.04.2
https://launchpad.net/ubuntu/+source/lxc/1.0.9-0ubuntu3
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===========================================================================
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