[css-color-4] Security Self-Review answers

[svgeesus]

This issue contains the answers to questions posed in Self-Review Questionnaire: Security and Privacy as they relate to the current draft of CSS Color 4 which is used to set the colors of various items on a Web page..

What information might this feature expose to Web sites or other parties, and for what purposes is that exposure necessary?
The system colors MAY expose user-chosen (in `forced colors mode) or OS-chosen colors, as discussed in the Security and Privacy Considerations.

Is this specification exposing the minimum amount of information necessary to power the feature?
Yes, we believe so.

How does this specification deal with personal information or personally-identifiable information or information derived thereof?
No personally-identifiable information.

How does this specification deal with sensitive information?
This specification does not deal with financial data, credentials, health information, location, or credentials.

Does this specification introduce new state for an origin that persists across browsing sessions?
No.

What information from the underlying platform, e.g. configuration data, is exposed by this specification to an origin?
See discussion of system colors in Security and Privacy Considerations

Does this specification allow an origin access to sensors on a user’s device
No.

What data does this specification expose to an origin? Please also document what data is identical to data exposed by other features, in the same or different contexts.
None.

Does this specification enable new script execution/loading mechanisms?
No. It does allow linking to ICC profiles, but these are declarative and do not contain any scripting mechanism.

Does this specification allow an origin to access other devices?
No.

Does this specification allow an origin some measure of control over a user agent’s native UI?
Yes, to a limited extent the native UI could in theory be spoofed. See discussion of system colors in [Security and Privacy Considerations]
(https://drafts.csswg.org/css-color-4/#priv-sec)

What temporary identifiers might this this specification create or expose to the web?
None.

How does this specification distinguish between behavior in first-party and third-party contexts?
No difference.

How does this specification work in the context of a user agent’s Private Browsing or "incognito" mode?
No difference.

Does this specification have a "Security Considerations" and "Privacy Considerations" section?
It has one combined section. Negative responses are not recorded, but are recorded in this issue.

Does this specification allow downgrading default security characteristics?
No.

What should this questionnaire have asked?
nothing else springs to mind which would be relevant to this specification.

[svgeesus]

Security review requested 04 Sept 2020

[svgeesus]

Closing as #4943 Wide Review is now complete.