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rootless: harden slirp4netns with mount namespace and seccomp

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When slirp4netns v0.4.0+ is used, now slirp4netns is hardened using
mount namespace ("sandbox") and seccomp to mitigate potential
vulnerabilities.

bump up rootlesskit: 2fcff6ceae...791ac8cb20

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
(cherry picked from commit e20b7323fb)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Akihiro Suda 2019-09-02 14:58:58 +09:00 committed by Sebastiaan van Stijn
parent 2ae5cbcf05
commit 5bd4233d7b
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GPG key ID: 76698F39D527CE8C
2 changed files with 7 additions and 2 deletions
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5
contrib/dockerd-rootless.sh
View file

@ -39,6 +39,9 @@ fi
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_NET:=}"
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_MTU:=}"
# if slirp4netns v0.4.0+ is installed, slirp4netns is hardened using sandbox (mount namespace) and seccomp
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SANDBOX:=auto}"
: "${DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SECCOMP:=auto}"
net=$DOCKERD_ROOTLESS_ROOTLESSKIT_NET
mtu=$DOCKERD_ROOTLESS_ROOTLESSKIT_MTU
if [ -z $net ]; then
@ -77,6 +80,8 @@ if [ -z $_DOCKERD_ROOTLESS_CHILD ]; then
# * /run: copy-up is required so that we can create /run/docker (hardcoded for plugins) in our namespace
exec $rootlesskit \
--net=$net --mtu=$mtu \
--slirp4netns-sandbox=$DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SANDBOX \
--slirp4netns-seccomp=$DOCKERD_ROOTLESS_ROOTLESSKIT_SLIRP4NETNS_SECCOMP \
--disable-host-loopback --port-driver=builtin \
--copy-up=/etc --copy-up=/run \
$DOCKERD_ROOTLESS_ROOTLESSKIT_FLAGS \

4
hack/dockerfile/install/rootlesskit.installer
View file

@ -1,7 +1,7 @@
#!/bin/sh
# v0.6.0
ROOTLESSKIT_COMMIT=2fcff6ceae968a1d895e6205e5154b107247356f
# v0.7.0
ROOTLESSKIT_COMMIT=791ac8cb209a107505cd1ca5ddf23a49913e176c
install_rootlesskit() {
case "$1" in