LXC would allow unintended access.
It was discovered that LXC incorrectly handled the TIOCSTI ioctl. An attacker could possibly use this issue to escape LXC containers.
2 August 2017
A security issue affects these releases of Ubuntu and its derivatives:
LXC would allow unintended access.
It was discovered that LXC incorrectly handled the TIOCSTI ioctl. An attacker could possibly use this issue to escape LXC containers.
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart LXC containers to make all the necessary changes.
Vulmon