WordPress Newsletter 2.6.x / 2.5.x Open Redirect

2015-03-04T00:00:00
ID PACKETSTORM:130647
Type packetstorm
Reporter Jing Wang
Modified 2015-03-04T00:00:00

Description

                                        
                                            `*WordPress Newsletter Plug-in URL Redirection (Open Redirect) Security  
Vulnerabilities*  
  
  
  
Exploit Title: WordPress Newsletter Plug-in /do.php &nr parameter URL  
Redirection Security Vulnerabilities  
Product: WordPress Newsletter Plug-in  
Vendor: Satollo.net  
Vulnerable Versions: 2.6.* 2.5.*  
Tested Version: Check Related Versions' Source Code  
Advisory Publication: March 04, 2015  
Latest Update: March 04, 2015  
Vulnerability Type: URL Redirection to Untrusted Site ('Open Redirect')  
[CWE-601]  
CVE Reference: *  
Credit: Wang Jing [CCRG, Nanyang Technological University (NTU), Singapore]  
  
  
  
  
  
  
  
*Advisory Details:*  
  
  
*(1) Vendor & Product Description:*  
  
  
*Vendor:*  
Satollo.net  
  
  
*Product & Version:*  
WordPress Newsletter Plug-in  
Version 2.6.4.4  
version 2.6.4.3  
version 2.6.4.2  
version 2.6.4.1  
version 2.6.4  
version 2.6.3  
version 2.5.3.3  
version 2.5.3.2  
version 2.5.3.1  
version 2.5.3  
version 2.5.2.3  
version 2.5.2.2  
version 2.5.2.1  
version 2.5.2  
version 2.5.1.5  
version 2.5.1.4  
Version 2.5.1.3  
Version 2.5.1.2  
Version 2.5.1.1  
Version 2.5.1  
Version 2.5.0.1  
Version 2.5.0  
  
  
  
  
*Vendor URL & Download:*  
WordPress Newsletter Plug-in application and source code can be downloaded  
from here,  
http://www.satollo.net/downloads  
https://wordpress.org/plugins/newsletter/  
https://github.com/WordPress-Plugins-Themes/newsletter  
  
  
  
  
*Product Introduction:*  
"This plug-in lets you collect subscribers on your blog with a single or  
double opt-in (law compliant)  
subscription process. Perfect for list building, you can create cool emails  
with visual editor, send and  
track them."  
  
"Key features:  
unlimited subscribers (the database is your, why should I limit you?)  
with statistics  
unlimited emails with tracking  
subscription widget, page or via custom form  
integrated with WordPress user registration  
single and double opt-in plus privacy acceptance checkbox (as per  
European laws)  
subscriber preferences to fine target your campaigns  
SMTP ready (Gmail, SendGrid, ...)  
html and text version messages  
configurable themes  
every message and label fully translatable from administrative panels  
(no .po/.mo file to edit)  
diagnostic panel for easy system tests  
extensible with specific modules (Facebook, Reports, Feed by Mail,  
Follow Up)"  
  
  
  
  
  
*(2) Vulnerability Details:*  
WordPress Newsletter Plug-in has a web application security bug problem.  
It can be exploited by URL Redirection (Open Redirect) attacks.  
  
*(2.1) *The vulnerability occurs at "do.php?" page with "&nr" parameter.  
The redirected page is encoded with Base64 encoding scheme. So encode the  
malicious redirection URL with Base64 first.  
  
"Base64 is a group of similar binary-to-text encoding schemes that  
represent binary data in an ASCII string format by translating it into a  
radix-64 representation. The term Base64 originates from a specific MIME  
content transfer encoding." (Wikipedia)  
  
For more information of Base64, one can check cryptography or coding books  
for detail.  
  
  
  
  
  
  
  
  
*References:*  
http://tetraph.com/security/open-redirect/wordpress-newsletter-plug-in-url-redirection-open-redirect-security-vulnerabilities/  
http://securityrelated.blogspot.com/2015/03/wordpress-newsletter-plug-in-url.html  
http://www.inzeed.com/kaleidoscope/computer-web-security/wordpress-newsletter-plug-in-url-redirection-open-redirect-security-vulnerabilities/  
http://diebiyi.com/articles/%E5%AE%89%E5%85%A8/wordpress-newsletter-plug-in-url-redirection-open-redirect-security-vulnerabilities/  
https://itinfotechnology.wordpress.com/2015/03/04/wordpress-newsletter-plug-in-url-redirection-open-redirect-security-vulnerabilities/  
http://lists.kde.org/?a=139222176300014&r=1&w=2  
  
  
  
  
  
  
--  
Wang Jing,  
Division of Mathematical Sciences (MAS),  
School of Physical and Mathematical Sciences (SPMS),  
Nanyang Technological University (NTU),  
Singapore.  
http://www.tetraph.com/wangjing/  
https://plus.google.com/u/0/+JingWang-tetraph-justqdjing/posts  
  
  
`