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fix: Prototype pollution via Cloud Code Webhooks #8305

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Merged
merged 1 commit into from
Nov 9, 2022
Merged

fix: Prototype pollution via Cloud Code Webhooks #8305

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11 changes: 11 additions & 0 deletions spec/vulnerabilities.spec.js
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Original file line number Diff line number Diff line change
Expand Up @@ -109,6 +109,17 @@ describe('Vulnerabilities', () => {
);
});

it('denies expanding existing object with polluted keys', async () => {
const obj = await new Parse.Object('RCE', { a: { foo: [] } }).save();
await reconfigureServer({
requestKeywordDenylist: ['foo'],
});
obj.addUnique('a.foo', 'abc');
await expectAsync(obj.save()).toBeRejectedWith(
new Parse.Error(Parse.Error.INVALID_KEY_NAME, `Prohibited keyword in request data: "foo".`)
);
});

it('denies creating a cloud trigger with polluted data', async () => {
Parse.Cloud.beforeSave('TestObject', ({ object }) => {
object.set('obj', {
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6 changes: 5 additions & 1 deletion src/Controllers/DatabaseController.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1765,7 +1765,11 @@ class DatabaseController {
if (this.options && this.options.requestKeywordDenylist) {
// Scan request data for denied keywords
for (const keyword of this.options.requestKeywordDenylist) {
const match = Utils.objectContainsKeyValue({ firstKey: undefined }, keyword.key, undefined);
const match = Utils.objectContainsKeyValue(
{ [firstKey]: true, [nextPath]: true },
keyword.key,
true
);
if (match) {
throw new Parse.Error(
Parse.Error.INVALID_KEY_NAME,
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