Arbitrary Domain Spoofing Vulnerability in Firefox < 56

CVE-2017-7815 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:P/A:N

On pages containing an iframe, the "data:" protocol can be used to create a modal dialog through Javascript that will have an arbitrary domains as the dialog's location, spoofing of the origin of the modal dialog from the user view. Note: This attack only affects installations with e10 multiprocess turned off. Installations with e10s turned on do not support the modal dialog functionality. This vulnerability affects Firefox < 56.

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