Awesome
bane
AppArmor profile generator for docker containers. Basically a better AppArmor profile, than creating one by hand, because who would ever do that.
"Reviewing AppArmor profile pull requests is the bane of my existence"
- Jess Frazelle
Table of Contents
<!-- END doctoc generated TOC please keep comment here to allow auto update -->Installation
Binaries
For installation instructions from binaries please visit the Releases Page.
Via Go
$ go get github.com/genuinetools/bane
Usage
$ bane -h
bane - Custom AppArmor profile generator for docker containers
Usage: bane <command>
Flags:
-d enable debug logging (default: false)
-profile-dir directory for saving the profiles (default: /etc/apparmor.d/containers)
Commands:
version Show the version information.
Config File
sample.toml is a AppArmor sample config for nginx in a container.
File Globbing
| Glob Example | Description |
|---|---|
/dir/file | match a specific file |
/dir/* | match any files in a directory (including dot files) |
/dir/a* | match any file in a directory starting with a |
/dir/*.png | match any file in a directory ending with .png |
/dir/[^.]* | match any file in a directory except dot files |
/dir/ | match a directory |
/dir/*/ | match any directory within /dir/ |
/dir/a*/ | match any directory within /dir/ starting with a |
/dir/*a/ | match any directory within /dir/ ending with a |
/dir/** | match any file or directory in or below /dir/ |
/dir/**/ | match any directory in or below /dir/ |
/dir/**[^/] | match any file in or below /dir/ |
/dir{,1,2}/** | match any file or directory in or below /dir/, /dir1/, and /dir2/ |
Installing a Profile
Now that we have our config file from above let's install it. bane will
automatically install the profile in a directory
/etc/apparmor.d/containers/ and run apparmor_parser.
$ sudo bane sample.toml
# Profile installed successfully you can now run the profile with
# `docker run --security-opt="apparmor:docker-nginx-sample"`
# now let's run nginx
$ docker run -d --security-opt="apparmor:docker-nginx-sample" -p 80:80 nginx
Using custom AppArmor profiles has never been easier!
Now let's try to do malicious activities with the sample profile:
$ docker run --security-opt="apparmor:docker-nginx-sample" -p 80:80 --rm -it nginx bash
root@6da5a2a930b9:~# ping 8.8.8.8
ping: Lacking privilege for raw socket.
root@6da5a2a930b9:/# top
bash: /usr/bin/top: Permission denied
root@6da5a2a930b9:~# touch ~/thing
touch: cannot touch 'thing': Permission denied
root@6da5a2a930b9:/# sh
bash: /bin/sh: Permission denied
root@6da5a2a930b9:/# dash
bash: /bin/dash: Permission denied
Sample dmesg output when using LogOnWritePaths:
[ 1964.142128] type=1400 audit(1444369315.090:38): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="docker-nginx" pid=3945 comm="apparmor_parser"
[ 1966.620327] type=1400 audit(1444369317.570:39): apparmor="AUDIT" operation="open" profile="docker-nginx" name="/1" pid=3985 comm="nginx" requested_mask="c" fsuid=0 ouid=0
[ 1966.624381] type=1400 audit(1444369317.574:40): apparmor="AUDIT" operation="mkdir" profile="docker-nginx" name="/var/cache/nginx/client_temp/" pid=3985 comm="nginx" requested_mask="c" fsuid=0 ouid=0
[ 1966.624446] type=1400 audit(1444369317.574:41): apparmor="AUDIT" operation="chown" profile="docker-nginx" name="/var/cache/nginx/client_temp/" pid=3985 comm="nginx" requested_mask="w" fsuid=0 ouid=0
[ 1966.624463] type=1400 audit(1444369317.574:42): apparmor="AUDIT" operation="mkdir" profile="docker-nginx" name="/var/cache/nginx/proxy_temp/" pid=3985 comm="nginx" requested_mask="c" fsuid=0 ouid=0
[ 1966.624494] type=1400 audit(1444369317.574:43): apparmor="AUDIT" operation="chown" profile="docker-nginx" name="/var/cache/nginx/proxy_temp/" pid=3985 comm="nginx" requested_mask="w" fsuid=0 ouid=0
[ 1966.624507] type=1400 audit(1444369317.574:44): apparmor="AUDIT" operation="mkdir" profile="docker-nginx" name="/var/cache/nginx/fastcgi_temp/" pid=3985 comm="nginx" requested_mask="c" fsuid=0 ouid=0
[ 1966.624534] type=1400 audit(1444369317.574:45): apparmor="AUDIT" operation="chown" profile="docker-nginx" name="/var/cache/nginx/fastcgi_temp/" pid=3985 comm="nginx" requested_mask="w" fsuid=0 ouid=0
[ 1966.624546] type=1400 audit(1444369317.574:46): apparmor="AUDIT" operation="mkdir" profile="docker-nginx" name="/var/cache/nginx/uwsgi_temp/" pid=3985 comm="nginx" requested_mask="c" fsuid=0 ouid=0
[ 1966.624582] type=1400 audit(1444369317.574:47): apparmor="AUDIT" operation="chown" profile="docker-nginx" name="/var/cache/nginx/uwsgi_temp/" pid=3985 comm="nginx" requested_mask="w" fsuid=0 ouid=0
What does the generated profile look like?
For the above sample.toml the generated profile is available as docker-nginx-sample.
Integration with Docker
This was originally a proof of concept for what will hopefully become a native security profile in the Docker engine. For more information on this, see docker/docker#17142.