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Merge pull request #5397 from erik-krogh/globalSanitizer
Approved by asgerf
2 parents c08230c + 1dcfc38 commit 40acb95

4 files changed

Lines changed: 37 additions & 1 deletion

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‎javascript/ql/src/semmle/javascript/security/dataflow/Xss.qll‎

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Original file line numberDiff line numberDiff line change
@@ -28,14 +28,15 @@ module Shared {
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abstract class SanitizerGuard extends TaintTracking::SanitizerGuardNode { }
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/**
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* A regexp replacement involving an HTML meta-character, viewed as a sanitizer for
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* A global regexp replacement involving an HTML meta-character, viewed as a sanitizer for
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* XSS vulnerabilities.
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*
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* The XSS queries do not attempt to reason about correctness or completeness of sanitizers,
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* so any such replacement stops taint propagation.
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*/
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class MetacharEscapeSanitizer extends Sanitizer, StringReplaceCall {
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MetacharEscapeSanitizer() {
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this.isGlobal() and
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exists(RegExpConstant c |
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c.getLiteral() = getRegExp().asExpr() and
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c.getValue().regexpMatch("['\"&<>]")

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

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@@ -653,6 +653,13 @@ nodes
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| tst.js:424:18:424:48 | window. ... it('#') |
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| tst.js:424:18:424:51 | window. ... '#')[1] |
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| tst.js:424:18:424:51 | window. ... '#')[1] |
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| tst.js:428:7:428:39 | target |
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| tst.js:428:16:428:32 | document.location |
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| tst.js:428:16:428:32 | document.location |
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| tst.js:428:16:428:39 | documen ... .search |
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| tst.js:430:18:430:23 | target |
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| tst.js:430:18:430:89 | target. ... data>') |
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| tst.js:430:18:430:89 | target. ... data>') |
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| typeahead.js:20:13:20:45 | target |
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| typeahead.js:20:22:20:38 | document.location |
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| typeahead.js:20:22:20:38 | document.location |
@@ -1283,6 +1290,12 @@ edges
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| tst.js:424:18:424:37 | window.location.hash | tst.js:424:18:424:48 | window. ... it('#') |
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| tst.js:424:18:424:48 | window. ... it('#') | tst.js:424:18:424:51 | window. ... '#')[1] |
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| tst.js:424:18:424:48 | window. ... it('#') | tst.js:424:18:424:51 | window. ... '#')[1] |
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| tst.js:428:7:428:39 | target | tst.js:430:18:430:23 | target |
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| tst.js:428:16:428:32 | document.location | tst.js:428:16:428:39 | documen ... .search |
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| tst.js:428:16:428:32 | document.location | tst.js:428:16:428:39 | documen ... .search |
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| tst.js:428:16:428:39 | documen ... .search | tst.js:428:7:428:39 | target |
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| tst.js:430:18:430:23 | target | tst.js:430:18:430:89 | target. ... data>') |
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| tst.js:430:18:430:23 | target | tst.js:430:18:430:89 | target. ... data>') |
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| typeahead.js:20:13:20:45 | target | typeahead.js:21:12:21:17 | target |
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| typeahead.js:20:22:20:38 | document.location | typeahead.js:20:22:20:45 | documen ... .search |
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| typeahead.js:20:22:20:38 | document.location | typeahead.js:20:22:20:45 | documen ... .search |
@@ -1491,6 +1504,7 @@ edges
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| tst.js:417:18:417:24 | payload | tst.js:416:17:416:31 | window.location | tst.js:417:18:417:24 | payload | Cross-site scripting vulnerability due to $@. | tst.js:416:17:416:31 | window.location | user-provided value |
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| tst.js:421:20:421:27 | match[1] | tst.js:419:15:419:29 | window.location | tst.js:421:20:421:27 | match[1] | Cross-site scripting vulnerability due to $@. | tst.js:419:15:419:29 | window.location | user-provided value |
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| tst.js:424:18:424:51 | window. ... '#')[1] | tst.js:424:18:424:32 | window.location | tst.js:424:18:424:51 | window. ... '#')[1] | Cross-site scripting vulnerability due to $@. | tst.js:424:18:424:32 | window.location | user-provided value |
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| tst.js:430:18:430:89 | target. ... data>') | tst.js:428:16:428:32 | document.location | tst.js:430:18:430:89 | target. ... data>') | Cross-site scripting vulnerability due to $@. | tst.js:428:16:428:32 | document.location | user-provided value |
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| typeahead.js:25:18:25:20 | val | typeahead.js:20:22:20:38 | document.location | typeahead.js:25:18:25:20 | val | Cross-site scripting vulnerability due to $@. | typeahead.js:20:22:20:38 | document.location | user-provided value |
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| v-html.vue:2:8:2:23 | v-html=tainted | v-html.vue:6:42:6:58 | document.location | v-html.vue:2:8:2:23 | v-html=tainted | Cross-site scripting vulnerability due to $@. | v-html.vue:6:42:6:58 | document.location | user-provided value |
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| various-concat-obfuscations.js:4:4:4:31 | "<div>" ... </div>" | various-concat-obfuscations.js:2:16:2:39 | documen ... .search | various-concat-obfuscations.js:4:4:4:31 | "<div>" ... </div>" | Cross-site scripting vulnerability due to $@. | various-concat-obfuscations.js:2:16:2:39 | documen ... .search | user-provided value |

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

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@@ -660,6 +660,13 @@ nodes
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| tst.js:424:18:424:48 | window. ... it('#') |
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| tst.js:424:18:424:51 | window. ... '#')[1] |
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| tst.js:424:18:424:51 | window. ... '#')[1] |
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| tst.js:428:7:428:39 | target |
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| tst.js:428:16:428:32 | document.location |
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| tst.js:428:16:428:32 | document.location |
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| tst.js:428:16:428:39 | documen ... .search |
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| tst.js:430:18:430:23 | target |
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| tst.js:430:18:430:89 | target. ... data>') |
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| tst.js:430:18:430:89 | target. ... data>') |
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| typeahead.js:9:28:9:30 | loc |
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| typeahead.js:9:28:9:30 | loc |
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| typeahead.js:10:16:10:18 | loc |
@@ -1307,6 +1314,12 @@ edges
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| tst.js:424:18:424:37 | window.location.hash | tst.js:424:18:424:48 | window. ... it('#') |
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| tst.js:424:18:424:48 | window. ... it('#') | tst.js:424:18:424:51 | window. ... '#')[1] |
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| tst.js:424:18:424:48 | window. ... it('#') | tst.js:424:18:424:51 | window. ... '#')[1] |
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| tst.js:428:7:428:39 | target | tst.js:430:18:430:23 | target |
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| tst.js:428:16:428:32 | document.location | tst.js:428:16:428:39 | documen ... .search |
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| tst.js:428:16:428:32 | document.location | tst.js:428:16:428:39 | documen ... .search |
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| tst.js:428:16:428:39 | documen ... .search | tst.js:428:7:428:39 | target |
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| tst.js:430:18:430:23 | target | tst.js:430:18:430:89 | target. ... data>') |
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| tst.js:430:18:430:23 | target | tst.js:430:18:430:89 | target. ... data>') |
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| typeahead.js:9:28:9:30 | loc | typeahead.js:10:16:10:18 | loc |
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| typeahead.js:9:28:9:30 | loc | typeahead.js:10:16:10:18 | loc |
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| typeahead.js:9:28:9:30 | loc | typeahead.js:10:16:10:18 | loc |

‎javascript/ql/test/query-tests/Security/CWE-079/DomBasedXss/tst.js‎

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@@ -423,3 +423,11 @@ function hash2() {
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document.write(window.location.hash.split('#')[1]); // NOT OK
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}
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function nonGlobalSanitizer() {
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var target = document.location.search
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$("#foo").html(target.replace(/<metadata>[\s\S]*<\/metadata>/, '<metadata></metadata>')); // NOT OK
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$("#foo").html(target.replace(/<|>/g, '')); // OK
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}

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