[CVE-2013-4295] Apache Shindig information disclosure vulnerability

From: Ryan Baxter <rbaxter85@apache.org>
To: dev@shindig.apache.org <dev@shindig.apache.org>,users@shindig.apache.org <users@shindig.apache.org>,security@apache.org <security@apache.org>,full-disclosure@lists.grok.org.uk,bugtraq@securityfocus.com,Kousuke Ebihara <kousuke@co3k.org>
Subject: [CVE-2013-4295] Apache Shindig information disclosure vulnerability

CVE-2013-4295: XXE vulnerability In Apache Shindig 2.5.0 (PHP)

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected: Apache Shindig PHP 2.5.0

Description: The gadget renderer in the PHP version of Apache Shindig
is subject to an XML External Entity (XXE) Injection attack.  The
vulnerability allows a malicious gadget author to construct paths to
content on the gadget rendering server which in turn will display the
content in the gadget iframe.

Mitigation: 2.5.0 users should upgrade to 2.5.0-update1.

Example:  The following gadget XML demonstrates the issue.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE Module [ <!ENTITY passwd SYSTEM "file:///etc/passwd"> ]>
<ModulePrefs title="Test Application">
<Require feature="opensocial-0.9" />
<Content type="html">
&passwd; hello

After rendering this gadget you will see the content of /etc/passwd in
the gadget iframe.

Credit: This issue was discovered by Kousuke Ebihara.

References: http://shindig.apache.org/security.html

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