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Wrap decodeURIComponent in try-catch to protect against malformed URIs

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This commit is contained in:
Michael Telatynski 2021-05-13 10:20:27 +01:00
parent 52420feab0
commit dd04b479a1
2 changed files with 17 additions and 8 deletions
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14
src/linkify-matrix.js
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@ -254,11 +254,15 @@ matrixLinkify.options = {
target: function(href, type) {
if (type === 'url') {
const transformed = tryTransformPermalinkToLocalHref(href);
if (transformed !== href || decodeURIComponent(href).match(matrixLinkify.ELEMENT_URL_PATTERN)) {
return null;
} else {
return '_blank';
try {
const transformed = tryTransformPermalinkToLocalHref(href);
if (transformed !== href || decodeURIComponent(href).match(matrixLinkify.ELEMENT_URL_PATTERN)) {
return null;
} else {
return '_blank';
}
} catch (e) {
// malformed URI
}
}
return null;

11
src/utils/permalinks/Permalinks.ts
View file

@ -346,9 +346,14 @@ export function tryTransformPermalinkToLocalHref(permalink: string): string {
return permalink;
}
const m = decodeURIComponent(permalink).match(matrixLinkify.ELEMENT_URL_PATTERN);
if (m) {
return m[1];
try {
const m = decodeURIComponent(permalink).match(matrixLinkify.ELEMENT_URL_PATTERN);
if (m) {
return m[1];
}
} catch (e) {
// Not a valid URI
return permalink;
}
// A bit of a hack to convert permalinks of unknown origin to Element links