Arbitrary Code Execution Affecting org.webjars.npm:angular package, versions [,1.4.0)


0.0
high

Snyk CVSS

    Attack Complexity High
    Confidentiality High
    Integrity High

    Threat Intelligence

    Exploit Maturity Proof of concept

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  • Snyk ID SNYK-JAVA-ORGWEBJARSNPM-479391
  • published 23 Jan 2017
  • disclosed 9 Mar 2015
  • credit Rodric Haddad

Introduced: 9 Mar 2015

CVE NOT AVAILABLE CWE-78 Open this link in a new tab

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.