Checklist¶

Check-Image-01: Is user/group ownership of config files set to root/glance?¶

Configuration files contain critical parameters and information required for smooth functioning of the component. If an unprivileged user, either intentionally or accidentally, modifies or deletes any of the parameters or the file itself then it would cause severe availability issues resulting in a denial of service to the other end users. Therefore, user ownership of such critical configuration files must be set to root and group ownership must be set to glance.

Run the following commands:

$ stat -L -c "%U %G" /etc/glance/glance-api-paste.ini | egrep "root glance"
$ stat -L -c "%U %G" /etc/glance/glance-api.conf | egrep "root glance"
$ stat -L -c "%U %G" /etc/glance/glance-cache.conf | egrep "root glance"
$ stat -L -c "%U %G" /etc/glance/glance-manage.conf | egrep "root glance"
$ stat -L -c "%U %G" /etc/glance/glance-registry-paste.ini | egrep "root glance"
$ stat -L -c "%U %G" /etc/glance/glance-registry.conf | egrep "root glance"
$ stat -L -c "%U %G" /etc/glance/glance-scrubber.conf | egrep "root glance"
$ stat -L -c "%U %G" /etc/glance/glance-swift-store.conf | egrep "root glance"
$ stat -L -c "%U %G" /etc/glance/policy.json | egrep "root glance"
$ stat -L -c "%U %G" /etc/glance/schema-image.json | egrep "root glance"
$ stat -L -c "%U %G" /etc/glance/schema.json | egrep "root glance"

Pass: If user and group ownership of all these configuration files is set to root and glance respectively. The above commands show output of root glance.

Fail: If the above commands do not return any output.

Check-Image-02: Are strict permissions set for configuration files?¶

Similar to the previous check, we recommend you set strict access permissions for such configuration files.

Run the following commands:

$ stat -L -c "%a" /etc/glance/glance-api-paste.ini
$ stat -L -c "%a" /etc/glance/glance-api.conf
$ stat -L -c "%a" /etc/glance/glance-cache.conf
$ stat -L -c "%a" /etc/glance/glance-manage.conf
$ stat -L -c "%a" /etc/glance/glance-registry-paste.ini
$ stat -L -c "%a" /etc/glance/glance-registry.conf
$ stat -L -c "%a" /etc/glance/glance-scrubber.conf
$ stat -L -c "%a" /etc/glance/glance-swift-store.conf
$ stat -L -c "%a" /etc/glance/policy.json
$ stat -L -c "%a" /etc/glance/schema-image.json
$ stat -L -c "%a" /etc/glance/schema.json

Pass: If permissions are set to 640 or stricter. The permissions of 640 translates into owner r/w, group r, and no rights to others. For example, u=rw,g=r,o=.

$ getfacl --tabular -a /etc/glance/glance-api.conf
getfacl: Removing leading '/' from absolute path names
# file: /etc/glance/glance-api.conf
USER   root  rw-
GROUP  glance  r--
mask         r--
other        ---

Fail: If permissions are not set to at least 640.

Check-Image-03: Is keystone used for authentication?¶

OpenStack supports various authentication strategies including noauth, and keystone. If the noauth strategy is used, then users can interact with OpenStack services without any authentication. This could be a potential risk since an attacker might gain unauthorized access to the OpenStack components. We strongly recommend that all services must be authenticated with keystone using their service accounts.

Pass: If value of parameter auth_strategy under [DEFAULT] section in /etc/glance/glance-api.conf is set to keystone and value of parameter auth_strategy under [DEFAULT] section in /etc/glance /glance-registry.conf is set to keystone.

Fail: If value of parameter auth_strategy under [DEFAULT] section in /etc/glance/glance-api.conf is set to noauth or value of parameter auth_strategy under [DEFAULT] section in /etc/glance/glance- registry.conf is set to noauth.

Check-Image-04: Is TLS enabled for authentication?¶

OpenStack components communicate with each other using various protocols and the communication might involve sensitive or confidential data. An attacker may try to eavesdrop on the channel in order to get access to sensitive information. All components must communicate with each other using a secured communication protocol.

Pass: If value of parameter auth_uri under [keystone_authtoken] section in /etc/glance/glance-api.conf is set to the Identity API endpoint starting with https://, and the value of the parameter insecure is under the same [keystone_authtoken] section in the same /etc/glance/glance-registry.conf is set to False.

Fail: If value of parameter auth_uri under [keystone_authtoken] section in /etc/glance/glance-api.conf is not set to Identity API endpoint starting with https://, or value of parameter insecure under the same [keystone_authtoken] section in the same /etc/glance/glance-api.conf is set to True.