RESOLVED DUPLICATE of bug 198579 174883
CSP rules ignored when a page navigates to a blob URL 
https://bugs.webkit.org/show_bug.cgi?id=174883
Summary CSP rules ignored when a page navigates to a blob URL
JF Paradis
Reported 2017-07-26 20:41:31 PDT
Created attachment 316513 [details] A PoC where a blob type html ignores CPS from container. A CSP-protected document can create Blob-URIs that, upon being navigated to, execute JavaScript on the origin domain but lose all CSP restrictions the origin was equipped with. PoC attached. Observations: - In FF, CPS rules are respected: allow/disallow unsafe-inline, nonce, etc. - W3C does seem to indicate that CPS should be applied: "Note: We do all this to ensure that a page cannot bypass its policy by embedding a frame or popping up a new window containing content it controls (blob: resources, or document.write())." https://www.w3.org/TR/CSP/#initialize-document-csp
Attachments
A PoC where a blob type html ignores CPS from container. (506 bytes, text/html)
2017-07-26 20:41 PDT, JF Paradis 		no flags
Details
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Radar WebKit Bug Importer
Comment 1 2017-07-27 13:45:35 PDT
<rdar://problem/33575448>
Daniel Bates
Comment 2 2019-06-11 10:40:56 PDT
*** This bug has been marked as a duplicate of bug 198579 ***
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