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'use strict';
XSS.Exceptions = (() => {
var Exceptions = {
get legacyExceptions() {
delete this.legacyExceptions;
this.legacyExceptions =
Legacy.getRxPref("filterXExceptions",
Legacy.RX.multi, "g", /^https?:[a-z:/@.?-]*$/i);
return this.legacyExceptions;
},
async getWhitelist() {
return (await Storage.get("sync", "xssWhitelist")).xssWhitelist;
},
async setWhitelist(xssWhitelist) {
await Storage.set("sync", {xssWhitelist});
},
async shouldIgnore(xssReq) {
function logEx(...args) {
debug("[XSS preprocessing] Ignoring %o", xssReq, ...args);
}
let {
srcObj,
destObj,
srcUrl,
destUrl,
srcOrigin,
destOrigin,
unescapedDest,
isGet,
isPost
} = xssReq;
// same srcUrl
if (srcOrigin === destOrigin) {
return true;
}
// same domain + https: source
if (/^https:/.test(srcOrigin) && xssReq.srcDomain === xssReq.destDomain) {
return true;
}
if (/^(?:chrome|resource|moz-extension|about):/.test(srcOrigin)) {
debug("Privileged origin", srcOrigin);
}
// destination or @source matching legacy regexp
if (this.legacyExceptions.test(unescapedDest) &&
!this.isBadException(destObj.hostname) ||
this.legacyExceptions.test("@" + unescape(srcUrl))) {
logEx("Legacy exception", this.legacyExceptions);
return true;
}
if (!srcObj && isGet) {
if (/^https?:\/\/msdn\.microsoft\.com\/query\/[^<]+$/.test(unescapedDest)) {
return true; // MSDN from Microsoft VS
}
}
if (srcOrigin) { // srcUrl-specific exceptions
if (/^about:(?!blank)/.test(srcOrigin))
return true; // any about: URL except about:blank
if (srcOrigin === "https://www.youtube.com" &&
/^https:\/\/(?:plus\.googleapis|apis\.google)\.com\/[\w/]+\/widget\/render\/comments\?/.test(destUrl) &&
Legacy.getPref("filterXExceptions.yt_comments")
) {
logEx("YouTube comments exception");
return true;
}
if (isPost) {
if (srcOrigin === "https://sso.post.ch" && destOrigin === "https://app.swisspost.ch") {
return true;
}
if (srcOrigin === "https://twitter.com" && /^https:\/\/.*\.twitter\.com$/.test(destOrigin)) {
return true;
}
{
let rx = /^https:\/\/(?:[a-z]+\.)?unionbank\.com$/;
if (rx.test(srcOrigin) && rx.test(destOrigin)) {
return true;
}
}
if (/^https?:\/\/csr\.ebay\.(?:\w{2,3}|co\.uk)\/cse\/start\.jsf$/.test(srcUrl) &&
/^https?:\/\/msa-lfn\.ebay\.(?:\w{2,3}|co\.uk)\/ws\/eBayISAPI\.dll\?[^<'"%]*$/.test(unescapedDest) &&
destObj.protocol === srcObj.protocol &&
Legacy.getPref("filterXException.ebay")) {
logEx("Ebay exception");
return true;
}
if (/^https:\/\/(?:cap\.securecode\.com|www\.securesuite\.net|(?:.*?\.)?firstdata\.(?:l[tv]|com))$/.test(srcUrl) &&
Legacy.getPref("filterXException.visa")) {
logEx("Verified by Visa exception");
return true;
}
if (/\.verizon\.com$/.test(srcOrigin) &&
/^https:\/\/signin\.verizon\.com\/sso\/authsso\/forumLogin\.jsp$/.test(destUrl) &&
Legacy.getPref("filterXExceptions.verizon")) {
logEx("Verizon login exception");
return true;
}
if (/^https?:\/\/mail\.lycos\.com\/lycos\/mail\/MailCompose\.lycos$/.test(srcUrl) &&
/\.lycosmail\.lycos\.com$/.test(destOrigin) &&
Legacy.getPref("filterXExceptions.lycosmail")) {
logEx("Lycos Mail exception");
return true;
}
if (/\.livejournal\.com$/.test(srcOrigin) &&
/^https?:\/\/www\.livejournal\.com\/talkpost_do\.bml$/.test(destUrl) &&
Legacy.getPref("filterXExceptions.livejournal")) {
logEx("Livejournal comments exception");
return true;
}
if (srcOrigin == "https://ssl.rapidshare.com" &&
xssReq.srcDomain == "rapidshare.com") {
logEx("Rapidshare upload exception");
return true;
}
if (srcOrigin == "http://wm.letitbit.net" &&
/^http:\/\/http\.letitbit\.net:81\/cgi-bin\/multi\/upload\.cgi\?/.test(destUrl) &&
Legacy.getPref("filterXExceptions.letitibit")
) {
logEx("letitbit.net upload exception");
return true;
}
if (/\.deviantart\.com$/.test(srcOrigin) &&
/^http:\/\/my\.deviantart\.com\/journal\/update\b/.test(destUrl) &&
Legacy.getPref("filterXExceptions.deviantart")
) {
logEx("deviantart.com journal post exception");
return true;
}
if (srcOrigin == "https://www.mymedicare.gov" &&
destOrigin == "https://myporal.medicare.gov" &&
Legacy.getPref("filterXExceptions.medicare")
) {
logEx("mymedicare.gov exception");
return true;
}
if (/^https?:\/\/(?:draft|www)\.blogger\.com\/template-editor\.g\?/.test(srcUrl) &&
/^https?:\/\/[\w\-]+\.blogspot\.com\/b\/preview\?/.test(destUrl) &&
Legacy.getPref("filterXExceptions.blogspot")
) {
logEx("blogspot.com template preview exception");
return true;
}
if (/^https?:\/\/www\.readability\.com\/articles\/queue$/.test(destUrl) &&
Legacy.getPref("filterXExceptions.readability")) {
logEx("Readability exception");
return true;
}
if (/^https?:\/\/pdf\.printfriendly\.com\/pdfs\/make$/.test(destUrl) &&
Legacy.getPref("filterXExceptions.printfriendly")) {
logEx("Printfriendly exception");
return true;
}
}
}
},
isBadException(host) {
// TLD check for Google search
let m = host.match(/\bgoogle\.((?:[a-z]{1,3}\.)?[a-z]+)$/i);
return m && tld.getPublicSuffix(host) != m[1];
},
partial(xssReq) {
let {
srcObj,
destObj,
srcUrl,
destUrl,
srcOrigin,
destOrigin,
} = xssReq;
let skipParams, skipRx;
if (/^https:\/\/www\.paypal\.com\/(?:[\w\-]+\/)?cgi-bin\/webscr\b/.test(destUrl)) {
// Paypal buttons encrypted parameter causes a DOS, strip it out
skipParams = ['encrypted'];
} else if (/\.adnxs\.com$/.test(srcOrigin) && /\.adnxs\.com$/.test(destOrigin)) {
skipParams = ['udj'];
} else if (/^https?:\/\/www\.mendeley\.com\/import\/bookmarklet\/$/.test(destUrl)) {
skipParams = ['html'];
} else if (destObj.hash && /^https:/.test(srcOrigin) &&
(/^https?:\/\/api\.facebook\.com\//.test(srcUrl) ||
/^https:\/\/tbpl\.mozilla\.org\//.test(srcUrl) || // work-around for hg reftest DOS
/^https:\/\/[^\/]+\.googleusercontent\.com\/gadgets\/ifr\?/.test(destUrl) // Google gadgets
)) {
skipRx = /#[^#]+$/; // remove receiver's hash
} else if (/^https?:\/\/apps\.facebook\.com\//.test(srcUrl) && Legacy.getPref("filterXExceptions.fbconnect")) {
skipRx = /&invite_url=javascript[^&]+/; // Zynga stuff
} else if (/^https?:\/\/l\.yimg\.com\/j\/static\/frame\?e=/.test(destUrl) &&
/\.yahoo\.com$/.test(srcOrigin) &&
Legacy.getPref("filterXExceptions.yahoo")) {
skipParams = ['e'];
} else if (/^https?:\/\/wpcomwidgets\.com\/\?/.test(destUrl)) {
skipParams = ["_data"];
} else if (/^https:\/\/docs\.google\.com\/picker\?/.test(destUrl)) {
skipParams = ["nav", "pp"];
} else if (/^https:\/\/.*[\?&]scope=/.test(destUrl)) {
skipRx = /[\?&]scope=[+\w]+(?=&|$)/;
}
if (skipParams) {
skipRx = new RegExp("(?:^|[&?])(?:" + skipParams.join('|') + ")=[^&]+", "g");
}
return {
skipParams,
skipRx
};
}
};
return Exceptions;
})();
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