Bug 243588

Summary:	Parser bug can introduce mXSS and HTML sanitizers bypass
Product:	WebKit	Reporter:	Ahmad Saleem <ahmad.saleem792>
Component:	DOM	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED CONFIGURATION CHANGED
Severity:	Normal	CC:	ap, bfulgham, cdumez, rniwa, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari 15
Hardware:	Mac (Apple Silicon)
OS:	macOS 12

Ahmad Saleem

Reported 2022-08-05 08:04:11 PDT

Hi Team, I was dumpster diving again in Mozilla Bugzilla to identify any test cases in DOM Parser where Safari / Webkit might be different and then testing them across all browser to ensure that Webkit can get to be more web-compatible and came across following test case: Test Case Link - https://jsbin.com/yomabutoze/edit?html,output Mozilla Bug - https://bugzilla.mozilla.org/show_bug.cgi?id=1598466 Chrome Bug - https://bugs.chromium.org/p/chromium/issues/detail?id=1005713 Some Blog Post - https://research.securitum.com/dompurify-bypass-using-mxss/ Web-Spec Chrome Discussion - https://bugs.chromium.org/p/chromium/issues/detail?id=1005713#c10 Commit - https://chromium.googlesource.com/chromium/src.git/+/d16226271d4d501de19f019aba1c145930b45503 *** STEPS TO REPRODUCE *** 1) Open Test Case Link 2) Notice Behavior << ACTUAL RESULT >> Safari get dialog with '1' value << EXPECTED RESULT >> No Dialog box similar to other browsers. ___ Appreciate if this can be fixed so there is no dialog box similar to other browsers. Thanks

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Radar WebKit Bug Importer

Comment 1 2022-08-05 14:28:33 PDT

Ryosuke Niwa

Comment 2 2022-08-06 00:05:32 PDT

Chris recently fixed this.

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