Arbitrary Code Execution Affecting org.webjars.npm:angular package, versions [,1.4.0)
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Test your applications- Snyk ID SNYK-JAVA-ORGWEBJARSNPM-479391
- published 23 Jan 2017
- disclosed 9 Mar 2015
- credit Rodric Haddad
How to fix?
Upgrade org.webjars.npm:angular to version 1.4.0 or higher.
Overview
org.webjars.npm:angular is a WebJar for angular.
Affected versions of this package are vulnerable to Arbitrary Code Execution via unsafe svg animation tags.
Details
Exploit Example:
<svg>
<a xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="?">
<circle r="400"></circle>
<animate attributeName="xlink:href" begin="0" from="javascript:alert(1)" to="&" />
</a>
</svg>
Here the anchor's href is animated, starting from a value that's a javascript URI. This allows execution of arbitrary javascript in the process. Preventing only the animation of links is tricky, as SVG is weird and namespaces aren't predictable. The fix is to have the sanitizer filter out svg animation tags instead.
References
CVSS Scores
version 3.1