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Sanitize untrusted variables from message previews before translation

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Fixes https://github.com/vector-im/element-web/issues/18314
This commit is contained in:
Travis Ralston 2021-07-31 11:43:05 -06:00
parent 1efd226896
commit 0923dd37ab
2 changed files with 14 additions and 1 deletions
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11
src/languageHandler.tsx
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@ -160,6 +160,17 @@ export function _t(text: string, variables?: IVariables, tags?: Tags): Translate
}
}
/**
* Sanitizes unsafe text for the sanitizer, ensuring references to variables will not be considered
* replaceable by the translation functions.
* @param {string} text The text to sanitize.
* @returns {string} The sanitized text.
*/
export function sanitizeForTranslation(text: string): string {
// Add a non-breaking space so the regex doesn't trigger when translating.
return text.replace(/\$\(([^)]*)\)/g, '$\xa0($1)');
}
/*
* Similar to _t(), except only does substitutions, and no translation
* @param {string} text The text, e.g "click <a>here</a> now to %(foo)s".

4
src/stores/room-list/previews/MessageEventPreview.ts
View file

@ -17,7 +17,7 @@ limitations under the License.
import { IPreview } from "./IPreview";
import { TagID } from "../models";
import { MatrixEvent } from "matrix-js-sdk/src/models/event";
import { _t } from "../../../languageHandler";
import { _t, sanitizeForTranslation } from "../../../languageHandler";
import { getSenderName, isSelf, shouldPrefixMessagesIn } from "./utils";
import ReplyThread from "../../../components/views/elements/ReplyThread";
import { getHtmlText } from "../../../HtmlUtils";
@ -58,6 +58,8 @@ export class MessageEventPreview implements IPreview {
body = getHtmlText(body);
}
body = sanitizeForTranslation(body);
if (msgtype === 'm.emote') {
return _t("* %(senderName)s %(emote)s", { senderName: getSenderName(event), emote: body });
}