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code review: prevent redirection to WAR when request is xmlhttprequest

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Raymond Hill 2018-02-16 13:37:20 -05:00
parent b2ff50f039
commit 4ed0d87b7b
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1 changed files with 15 additions and 6 deletions
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19
src/js/redirect-engine.js
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@ -81,10 +81,21 @@ var RedirectEntry = function() {
/******************************************************************************/
RedirectEntry.prototype.toURL = function() {
// Prevent redirection to web accessible resources when the request is
// of type 'xmlhttprequest', because XMLHttpRequest.responseURL would
// cause leakage of extension id. See:
// - https://stackoverflow.com/a/8056313
// - https://bugzilla.mozilla.org/show_bug.cgi?id=998076
RedirectEntry.prototype.toURL = function(details) {
if ( this.warURL !== undefined ) {
if (
details instanceof Object === false ||
details.requestType !== 'xmlhttprequest'
) {
return this.warURL + '?secret=' + vAPI.warSecret;
}
}
if ( this.data.startsWith('data:') === false ) {
if ( this.mime.indexOf(';') === -1 ) {
this.data = 'data:' + this.mime + ';base64,' + btoa(this.data);
@ -214,12 +225,10 @@ RedirectEngine.prototype.lookupToken = function(entries, reqURL) {
RedirectEngine.prototype.toURL = function(context) {
var token = this.lookup(context);
if ( token === undefined ) {
return;
}
if ( token === undefined ) { return; }
var entry = this.resources.get(token);
if ( entry !== undefined ) {
return entry.toURL();
return entry.toURL(context);
}
};