On Friday, January 17, 2025 at 7:42:03 AM UTC+9 Jun Kokatsu wrote:
Contact emailsjkoka...@google.com Specificationhttps://github.com/w3c/webappsec-permissions-policy/pull/546 Summary Introduces a new violation type called "Potential Permissions Policy violation", which will only look at Permissions Policy (including report-only policy) and the allow attribute set in iframes to detect the conflict between Permissions Policy enforced vs permissions propagated to iframes. Motivation Permissions Policy violation reports for cross-origin iframes are only sent to the iframe's reporting endpoint and not to the embedder's reporting endpoint, because of the concern that it might leak sensitive information about a cross-origin iframe. However, this makes it difficult for sites to enforce Permissions Policy because it can't learn about breakages in cross-origin iframes. This feature introduces a new violation type called "Potential Permissions Policy violation", which will only look at existing Permissions Policy (including report-only policy) and the allow attribute set in iframes to detect the conflict between Permissions Policy enforced vs permissions being propagated to iframes. Since both Permissions Policy and allow attributes are set by the embedder, this feature does not leak any new information to the embedder. However, potential Permissions Policy violations will be sent when an iframe is loaded, and not when the iframe uses the prohibited feature, which is different from the normal Permissions Policy violations which fires upon a feature usage (hence the name "potential"). Blink componentBlink>PermissionsPolicy <https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3EPermissionsPolicy%22> TAG reviewNone TAG review statusNot applicable Can you say more why you believe TAG review is not applicable for this feature? I cannot figure out which exception, if any, it falls under from this list <https://www.chromium.org/blink/launching-features/wide-review/#exceptions>. Risks Interoperability and Compatibility None *Gecko*: No signal <https://github.com/mozilla/standards-positions/issues/1164> *WebKit*: No signal <https://github.com/WebKit/standards-positions/issues/448> *Web developers*: No signals Why are we proposing to ship this, if it is not interesting to any web developers, and has support from no other browsers? *Other signals*: Security Potential Permissions Policy violation reports should not include any new information about cross-origin iframes WebView application risks Does this intent deprecate or change behavior of existing APIs, such that it has potentially high risk for Android WebView-based applications? None Debuggability None Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, Android, and Android WebView)?No Which platform will it not be supported on? Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> ?https://github.com/web-platform-tests/wpt/pull/49978 Flag name on about://flagsNone Finch feature namePotentialPermissionsPolicyReporting Requires code in //chrome?False Tracking bughttps://issues.chromium.org/issues/40941424 Estimated milestonesShipping on desktop134 Anticipated spec changes Open questions about a feature may be a source of future web compat or interop issues. Please list open issues (e.g. links to known github issues in the project for the feature specification) whose resolution may introduce web compat/interop risk (e.g., changing to naming or structure of the API in a non-backward-compatible way). None Link to entry on the Chrome Platform Statushttps://chromestatus.com/ feature/5154241037205504?gate=5069369228656640 This intent message was generated by Chrome Platform Status <https://chromestatus.com/>. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/cc952d2a-0579-4449-9d4a-01b53d0b2fd7n%40chromium.org.
