Improper Input Validation Affecting xmldom package, versions *
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Test your applications- Snyk ID SNYK-JS-XMLDOM-3092935
- published 2 Nov 2022
- disclosed 1 Nov 2022
- credit frumioj, karfau
Introduced: 1 Nov 2022
CVE-2022-39353 Open this link in a new tabHow to fix?
There is no fixed version for xmldom.
Overview
xmldom is an A pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module.
Affected versions of this package are vulnerable to Improper Input Validation due to parsing XML that is not well-formed, and contains multiple top-level elements. All the root nodes are being added to the childNodes collection of the Document, without reporting or throwing any error.
Workarounds
One of the following approaches might help, depending on your use case:
Instead of searching for elements in the whole DOM, only search in the
documentElement.Reject a document with a document that has more than 1
childNode.
PoC
var DOMParser = require('xmldom').DOMParser;
var xmlData = '<?xml version="1.0" encoding="UTF-8"?>\n' +
'<root>\n' +
' <branch girth="large">\n' +
' <leaf color="green" />\n' +
' </branch>\n' +
'</root>\n' +
'<root>\n' +
' <branch girth="twig">\n' +
' <leaf color="gold" />\n' +
' </branch>\n' +
'</root>\n';
var xmlDOM = new DOMParser().parseFromString(xmlData);
console.log(xmlDOM.toString());
This will result with the following output:
<?xml version="1.0" encoding="UTF-8"?><root>
<branch girth="large">
<leaf color="green"/>
</branch>
</root>
<root>
<branch girth="twig">
<leaf color="gold"/>
</branch>
</root>