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fix(compiler): disallow i18n on iframe policy attributes (XSS) #68559

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fix(compiler): disallow i18n on iframe policy attributes (XSS) #68559

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29 changes: 25 additions & 4 deletions packages/compiler/src/render3/view/i18n/meta.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,10 @@ import * as i18n from '../../../i18n/i18n_ast';
import {createI18nMessageFactory, VisitNodeFn} from '../../../i18n/i18n_parser';
import * as html from '../../../ml_parser/ast';
import {ParseTreeResult} from '../../../ml_parser/parser';
import {splitNsName} from '../../../ml_parser/tags';
import * as o from '../../../output/output_ast';
import {SecurityContext} from '../../../core';
import {DomElementSchemaRegistry} from '../../../schema/dom_element_schema_registry';
import {isTrustedTypesSink} from '../../../schema/trusted_types_sinks';

import {hasI18nAttrs, I18N_ATTR, I18N_ATTR_PREFIX, icuFromI18nMessage} from './util';
Expand Down Expand Up @@ -49,6 +52,18 @@ const setI18nRefs = (originalNodeMap: Map<html.Node, html.Node>): VisitNodeFn =>
};
};

const domSchema = new DomElementSchemaRegistry();

function isIframePolicyTranslatedAttribute(tagName: string, attrName: string): boolean {
const elementName = splitNsName(tagName)[1];

return (
elementName.toLowerCase() === 'iframe' &&
domSchema.securityContext(elementName, attrName, /* isAttribute */ true) ===
SecurityContext.ATTRIBUTE_NO_BINDING
);
}

/**
* This visitor walks over HTML parse tree and converts information stored in
* i18n-related attributes ("i18n" and "i18n-*") into i18n meta object that is
Expand Down Expand Up @@ -201,14 +216,20 @@ export class I18nMetaVisitor implements html.Visitor {
} else if (attr.name.startsWith(I18N_ATTR_PREFIX)) {
// 'i18n-*' attributes
const name = attr.name.slice(I18N_ATTR_PREFIX.length);
let isTrustedType: boolean;
let isSecuritySensitive: boolean;
if (node instanceof html.Component) {
isTrustedType = node.tagName === null ? false : isTrustedTypesSink(node.tagName, name);
isSecuritySensitive =
node.tagName === null
? false
: isTrustedTypesSink(node.tagName, name) ||
isIframePolicyTranslatedAttribute(node.tagName, name);
} else {
isTrustedType = isTrustedTypesSink(node.name, name);
isSecuritySensitive =
isTrustedTypesSink(node.name, name) ||
isIframePolicyTranslatedAttribute(node.name, name);
}

if (isTrustedType) {
if (isSecuritySensitive) {
this._reportError(
attr,
`Translating attribute '${name}' is disallowed for security reasons.`,
Expand Down
6 changes: 4 additions & 2 deletions packages/core/test/acceptance/security_spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -752,7 +752,7 @@ describe('iframe processing', () => {
},
);

it('should work when a security-sensitive attributes are marked for translation', () => {
it('should error when iframe policy attributes are marked for translation', () => {
@Component({
selector: 'my-comp',
template: ` <iframe src="${TEST_IFRAME_URL}" i18n-sandbox sandbox=""> </iframe> `,
Expand All @@ -761,7 +761,9 @@ describe('iframe processing', () => {
})
class IframeComp {}

expectIframeToBeCreated(IframeComp, {src: TEST_IFRAME_URL});
expect(() => TestBed.createComponent(IframeComp)).toThrowError(
/Translating attribute 'sandbox' is disallowed for security reasons./,
);
});
});
});
Expand Down
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