[Webkit-unassigned] [Bug 66579] New: [meta] XSSAuditor should have fewer false negatives

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=66579

           Summary: [meta] XSSAuditor should have fewer false negatives
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: XSSAuditor
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: abarth at webkit.org
                CC: dbates at webkit.org


Currently the XSSAuditor has very few false positives, but it does have a number of false negatives.  False negatives a problematic because they let attackers bypass the filter, negating some of its security benefits.  False positives fall into two categories:

1) Tricky injections into in-scope injection contexts.
2) Injections into out-of-scope injection contexts.

Whether an injection context is in-scope is somewhat of an arbitrary distinction, but we should aim to tackle all the tricky injection vectors for the in-scope injection contexts before we expand to consider more contexts in-scope.  This approach puts us on a path to eliminating all the attack vectors for a given set of vulnerabilities rather than catching some, but not all, the attack vectors for a large number of vulnerabilities.

Let's use this bug as a meta bug for Type 1 vulnerabilities (which will appear as blocking this bug).

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