ap/lxc-2.0.9_d3a03247-i586-1.txz
This update fixes a security issue where a malicious privileged container
could overwrite the host binary and thus gain root-level code execution on
the host. As the LXC project considers privileged containers to be unsafe
no CVE has been assigned for this issue for LXC. To prevent this attack,
LXC has been patched to create a temporary copy of the calling binary
itself when it starts or attaches to containers. To do this LXC creates an
anonymous, in-memory file using the memfd_create() system call and copies
itself into the temporary in-memory file, which is then sealed to prevent
further modifications. LXC then executes this sealed, in-memory file
instead of the original on-disk binary.
For more information, see:
https://seclists.org/oss-sec/2019/q1/119
(* Security fix *)
Giuseppe Di Terlizzi