[Buildroot] [git commit] package/runc: add upstream security fix for CVE-2019-5736

[Peter Korsgaard]

>>>>> "Peter" == Peter Korsgaard <peter at korsgaard.com> writes:

 > commit: https://git.buildroot.net/buildroot/commit/?id=6e3f7fbc072c88ab344f2ffa39e402464b566f19
 > branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master

 > The vulnerability allows a malicious container to (with minimal user
 > interaction) overwrite the host runc binary and thus gain root-level
 > code execution on the host. The level of user interaction is being able
 > to run any command (it doesn't matter if the command is not
 > attacker-controlled) as root within a container in either of these
 > contexts:

 >   * Creating a new container using an attacker-controlled image.
 >   * Attaching (docker exec) into an existing container which the
 >     attacker had previous write access to.

 > For more details, see the advisory:

 > https://www.openwall.com/lists/oss-security/2019/02/11/2

 > The fix for this issue uses fexecve(3), which isn't available on uClibc, so
 > add a dependency on !uclibc to runc and propagate to the reverse
 > dependencies (containerd/docker-engine).

 > Signed-off-by: Peter Korsgaard <peter at korsgaard.com>

Committed to 2018.11.x, thanks.

I have so far NOT backported it to 2018.02.x as it requires a bump of
the entire docker stack, and given that 2018.02 is very close to EOL I
suggest affected users (using docker on a writable rootfs with untrusted
containers) instead move to 2019.02.

-- 
Bye, Peter Korsgaard