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Merge pull request github#6024 from erik-krogh/serialize-javascript
Approved by asgerf
2 parents 3923acb + 0adc001 commit 4963a8f

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‎javascript/change-notes/2021-06-06-serialize-javascript.md

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lgtm,codescanning
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* The dataflow libraries now model dataflow in the [`serialize-javascript`](https://npmjs.com/package/serialize-javascript) library.
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Affected packages are
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[serialize-javascript](https://npmjs.com/package/serialize-javascript)

‎javascript/ql/src/semmle/javascript/JsonParsers.qll

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@@ -29,7 +29,8 @@ private class PlainJsonParserCall extends JsonParserCall {
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callee = DataFlow::moduleImport("parse-json") or
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callee = DataFlow::moduleImport("json-parse-better-errors") or
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callee = DataFlow::moduleImport("json-safe-parse") or
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callee = AngularJS::angular().getAPropertyRead("fromJson")
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callee = AngularJS::angular().getAPropertyRead("fromJson") or
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callee = DataFlow::moduleImport("serialize-javascript")
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)
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}
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‎javascript/ql/src/semmle/javascript/security/dataflow/Xss.qll

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@@ -55,6 +55,17 @@ module Shared {
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}
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}
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/**
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* A call to `serialize-javascript`, which prevents XSS vulnerabilities unless
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* the `unsafe` option is set.t
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*/
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class SerializeJavascriptSanitizer extends Sanitizer, DataFlow::CallNode {
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SerializeJavascriptSanitizer() {
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this = DataFlow::moduleImport("serialize-javascript").getACall() and
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not this.getOptionArgument(1, "unsafe").mayHaveBooleanValue(true)
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}
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}
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private import semmle.javascript.security.dataflow.IncompleteHtmlAttributeSanitizationCustomizations::IncompleteHtmlAttributeSanitization as IncompleteHTML
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/**
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private class UriEncodingSanitizer extends Sanitizer, Shared::UriEncodingSanitizer { }
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private class SerializeJavascriptSanitizer extends Sanitizer, Shared::SerializeJavascriptSanitizer {
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}
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private class IsEscapedInSwitchSanitizer extends Sanitizer, Shared::IsEscapedInSwitchSanitizer { }
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private class QuoteGuard extends SanitizerGuard, Shared::QuoteGuard { }
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private class UriEncodingSanitizer extends Sanitizer, Shared::UriEncodingSanitizer { }
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private class SerializeJavascriptSanitizer extends Sanitizer, Shared::SerializeJavascriptSanitizer {
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}
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private class IsEscapedInSwitchSanitizer extends Sanitizer, Shared::IsEscapedInSwitchSanitizer { }
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private class QuoteGuard extends SanitizerGuard, Shared::QuoteGuard { }
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private class UriEncodingSanitizer extends Sanitizer, Shared::UriEncodingSanitizer { }
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private class SerializeJavascriptSanitizer extends Sanitizer, Shared::SerializeJavascriptSanitizer {
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}
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private class IsEscapedInSwitchSanitizer extends Sanitizer, Shared::IsEscapedInSwitchSanitizer { }
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private class QuoteGuard extends SanitizerGuard, Shared::QuoteGuard { }

‎javascript/ql/test/library-tests/TaintTracking/BasicTaintTracking.expected

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@@ -166,6 +166,7 @@ typeInferenceMismatch
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| tst.js:2:13:2:20 | source() | tst.js:45:10:45:24 | x.map(x2 => x2) |
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| tst.js:2:13:2:20 | source() | tst.js:47:10:47:30 | Buffer. ... 'hex') |
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| tst.js:2:13:2:20 | source() | tst.js:48:10:48:22 | new Buffer(x) |
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| tst.js:2:13:2:20 | source() | tst.js:51:10:51:31 | seriali ... ript(x) |
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| xml.js:5:18:5:25 | source() | xml.js:8:14:8:17 | text |
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| xml.js:12:17:12:24 | source() | xml.js:13:14:13:19 | result |
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| xml.js:23:18:23:25 | source() | xml.js:20:14:20:17 | attr |

‎javascript/ql/test/library-tests/TaintTracking/tst.js

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@@ -46,4 +46,7 @@ function test() {
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sink(Buffer.from(x, 'hex')); // NOT OK
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sink(new Buffer(x)); // NOT OK
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const serializeJavaScript = require("serialize-javascript");
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sink(serializeJavaScript(x)) // NOT OK
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}

‎javascript/ql/test/query-tests/Security/CWE-079/ReflectedXss/ReflectedXss.expected

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@@ -182,6 +182,14 @@ nodes
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| tst2.js:36:12:36:12 | p |
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| tst2.js:37:12:37:18 | other.p |
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| tst2.js:37:12:37:18 | other.p |
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| tst2.js:43:7:43:24 | p |
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| tst2.js:43:9:43:9 | p |
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| tst2.js:43:9:43:9 | p |
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| tst2.js:49:7:49:53 | unsafe |
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| tst2.js:49:16:49:53 | seriali ... true}) |
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| tst2.js:49:36:49:36 | p |
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| tst2.js:51:12:51:17 | unsafe |
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| tst2.js:51:12:51:17 | unsafe |
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| tst3.js:5:7:5:24 | p |
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| tst3.js:5:9:5:9 | p |
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| tst3.js:5:9:5:9 | p |
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| tst2.js:30:9:30:9 | p | tst2.js:30:7:30:24 | p |
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| tst2.js:33:11:33:11 | p | tst2.js:37:12:37:18 | other.p |
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| tst2.js:33:11:33:11 | p | tst2.js:37:12:37:18 | other.p |
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| tst2.js:43:7:43:24 | p | tst2.js:49:36:49:36 | p |
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| tst2.js:43:9:43:9 | p | tst2.js:43:7:43:24 | p |
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| tst2.js:43:9:43:9 | p | tst2.js:43:7:43:24 | p |
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| tst2.js:49:7:49:53 | unsafe | tst2.js:51:12:51:17 | unsafe |
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| tst2.js:49:7:49:53 | unsafe | tst2.js:51:12:51:17 | unsafe |
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| tst2.js:49:16:49:53 | seriali ... true}) | tst2.js:49:7:49:53 | unsafe |
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| tst2.js:49:36:49:36 | p | tst2.js:49:16:49:53 | seriali ... true}) |
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| tst3.js:5:7:5:24 | p | tst3.js:6:12:6:12 | p |
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| tst3.js:5:7:5:24 | p | tst3.js:6:12:6:12 | p |
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| tst3.js:5:9:5:9 | p | tst3.js:5:7:5:24 | p |
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| tst2.js:21:14:21:14 | p | tst2.js:14:9:14:9 | p | tst2.js:21:14:21:14 | p | Cross-site scripting vulnerability due to $@. | tst2.js:14:9:14:9 | p | user-provided value |
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| tst2.js:36:12:36:12 | p | tst2.js:30:9:30:9 | p | tst2.js:36:12:36:12 | p | Cross-site scripting vulnerability due to $@. | tst2.js:30:9:30:9 | p | user-provided value |
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| tst2.js:37:12:37:18 | other.p | tst2.js:30:9:30:9 | p | tst2.js:37:12:37:18 | other.p | Cross-site scripting vulnerability due to $@. | tst2.js:30:9:30:9 | p | user-provided value |
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| tst2.js:51:12:51:17 | unsafe | tst2.js:43:9:43:9 | p | tst2.js:51:12:51:17 | unsafe | Cross-site scripting vulnerability due to $@. | tst2.js:43:9:43:9 | p | user-provided value |
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| tst3.js:6:12:6:12 | p | tst3.js:5:9:5:9 | p | tst3.js:6:12:6:12 | p | Cross-site scripting vulnerability due to $@. | tst3.js:5:9:5:9 | p | user-provided value |

‎javascript/ql/test/query-tests/Security/CWE-079/ReflectedXss/ReflectedXssWithCustomSanitizer.expected

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| tst2.js:21:14:21:14 | p | Cross-site scripting vulnerability due to $@. | tst2.js:14:9:14:9 | p | user-provided value |
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| tst2.js:36:12:36:12 | p | Cross-site scripting vulnerability due to $@. | tst2.js:30:9:30:9 | p | user-provided value |
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| tst2.js:37:12:37:18 | other.p | Cross-site scripting vulnerability due to $@. | tst2.js:30:9:30:9 | p | user-provided value |
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| tst2.js:51:12:51:17 | unsafe | Cross-site scripting vulnerability due to $@. | tst2.js:43:9:43:9 | p | user-provided value |
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| tst3.js:6:12:6:12 | p | Cross-site scripting vulnerability due to $@. | tst3.js:5:9:5:9 | p | user-provided value |

‎javascript/ql/test/query-tests/Security/CWE-079/ReflectedXss/tst2.js

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res.send(p); // NOT OK
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res.send(other.p); // NOT OK
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});
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const serializeJavaScript = require('serialize-javascript');
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app.get('/baz', function(req, res) {
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let { p } = req.params;
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var serialized = serializeJavaScript(p);
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res.send(serialized); // OK
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var unsafe = serializeJavaScript(p, {unsafe: true});
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res.send(unsafe); // NOT OK
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});

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