[WEB SECURITY] DefenseCode WebScanner DAST Advisory: WordPress User Access Manager Plugin Security Vulnerability

DefenseCode defensecode at defensecode.com
Thu May 11 06:39:32 EDT 2017


              DefenseCode WebScanner DAST Advisory
              WordPress User Access Manager Plugin
                    Security Vulnerability


Advisory ID: DC-2017-01-021
Advisory Title: WordPress User Access Manager Plugin Cross Site
Scripting vulnerability
Advisory URL:
http://www.defensecode.com/advisory/DC-2017-01-021_WordPress_User_Access_Manager_Plugin_Advisory.pdf
Software: WordPress User Access Manager
Software Language: PHP
Version: 1.2.14 and below
Vendor Status: Vendor contacted, vulnerability fixed
Release Date: 20170510
Risk: Medium


1. General Overview
===================
During the security audit of User Access Manager plugin for WordPress
CMS, Cross Site Scripting vulnerability was discovered using
DefenseCode WebScanner application security analysis platform.

More information about WebScanner is available at URL:
http://www.defensecode.com/


2. Software Overview
===================
According to the developers, User Access Manager plugin can be used to
manage the access to your posts, pages, categories and files.

It has more than 40,000 downloads on wordpress.org.

Homepage:
https://wordpress.org/plugins/user-access-manager/


3. Brief Vulnerability Description
==================================
During the security analysis, WebScanner discovered Cross-Site
Scripting vulnerability in User Access Manager Plugin.

The Cross-Site Scripting vulnerability can enable the attacker to
construct the URL that contains malicious JavaScript code. If the
administrator of the site makes a request to such an URL, the
attacker's code will be executed, with unrestricted access to the
WordPress site in question. The attacker can entice the administrator
to visit the URL in various ways, including sending the URL by email,
posting it as a part of the comment on the vulnerable site or another
forum. Due to missing nonce token the vulnerability is also directly
exposed to other, indirect, attack vectors.

3.1. Cross-Site Scripting
  Function:            echo()
  Variable:            $_GET['id']
  Vulnerable URL:   
http://vulnerablesite.com/wp-admin/admin.php?page=uam_usergroup&action=editGroup&id=%5C%22%3E%3Cscript%3Ealert%281%29%3C%2Fscript%3E
  File:                user-access-manager\tpl\adminGroup.php
    ---------
    443    $groupId = $_GET['id'];   
    444    getPrintEditGroup($groupId);
    ...
    67    function getPrintEditGroup($sGroupId = null)
    ...
    83        <input type="hidden" value="<?php echo $sGroupId; ?>"
name="userGroupId" />
    ---------


4. Solution
===========
Vendor resolved security issues in the next release (2.0.0).
All users are strongly advised to update WordPress User Access Manager
plugin to the latest available version.


5. Credits
==========
Discovered by Neven Biruski with DefenseCode WebScanner web
application security analysis platform.


6. Disclosure Timeline
======================
04/04/2017    Vendor contacted
12/04/2017    Vendor responded. Asked us for a bit more time.
23/04/2017    Update released
09/05/2017    Advisory released to the public


7. About DefenseCode
====================
DefenseCode L.L.C. delivers products and services designed to analyze
and test web, desktop and mobile applications for security
vulnerabilities.

DefenseCode ThunderScan is a SAST (Static Application Security
Testing, WhiteBox Testing) solution for performing extensive security
audits of application source code. ThunderScan SAST performs fast and
accurate analyses of large and complex source code projects delivering
precise results and low false positive rate.

DefenseCode WebScanner is a DAST (Dynamic Application Security
Testing, BlackBox Testing) solution for comprehensive security audits
of active web applications. WebScanner will test a website's security
by carrying out a large number of attacks using the most advanced
techniques, just as a real attacker would.

Subscribe for free software trial on our website
http://www.defensecode.com/

E-mail: defensecode[at]defensecode.com

Website: http://www.defensecode.com/
Twitter: https://twitter.com/DefenseCode/





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