Alternative solution to this could be if netplan.io grows a new root-
only directory option that defines a schema for storing sensitive
information like credentials. Not sure if this is something netplan.io
would plan to grow or not. Tagging netplan.io on this bug as an FYI
`wishlist` in case future feature work goes this direction.
The features that may be nice from netplan frm a usability standpoint:
1. documented policy that suggests chmod 600 on any netplan YAML
2. Instrumented policy in `netplan generate` or `netplan apply` that warns
about world-readable files consumed which happen to contain security-related
keys.
3. Ideally, sensitive YAML content root-only files wouldn't live in with
world-readable content in /etc/netplan/* files. Possibly define a
sensitive/security/credentials subdirectory/schema that could contain the
security bits.
This is probably not the bug to file against netplan.io as it contains
multiple feature request, but I wanted to track the sentiment in case
that effort is becomes something desireable for netplan (and thereby
affecting how cloud-init should write out sensitive files).
** Also affects: netplan
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1981646
Title:
network v2: do not render world-readable netplan when wifi or auth
config contains sensitive passwords
Status in cloud-init:
Triaged
Status in netplan:
New
Bug description:
https://netplan.io/reference/ supports wifi password and auto client-
key-password keys which should generally not be world-readable.
But, when rendering passthrough V2 network configuration, cloud-init emits a
single /etc/netplan/50-cloud-init.yaml file that is world readable.
If network v2 config contains sensitive password keys it may make
sense for cloud-init to either:
1. Make /etc/netplan/50-cloud-init.yaml only root-readable
- OR -
2. Write a world-readable /etc/netplan/50-cloud-init.yaml containing all keys
except wifis and auth and a root-readable
/etc/netplan/50-cloud-init-sensitive.yaml which would contain any security
sensitive config content.
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