Date: Thu, 2 Apr 2015 17:00:31 +0800
From: Jing Wang <justqdjing@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] 6kbbs v8.0 Multiple CSRF (Cross-Site Request Forgery) Security
	Vulnerabilities

*6kbbs v8.0 Multiple CSRF (Cross-Site Request Forgery) Security
Vulnerabilities*


Exploit Title: 6kbbs Multiple CSRF (Cross-Site Request Forgery) Security
Vulnerabilities
Vendor: 6kbbs
Product: 6kbbs
Vulnerable Versions: v7.1   v8.0
Tested Version: v7.1   v8.0
Advisory Publication: April 02, 2015
Latest Update: April 02, 2015
Vulnerability Type: Cross-Site Request Forgery (CSRF) [CWE-352]
CVE Reference: *
CVSS Severity (version 2.0):
CVSS v2 Base Score: 6.8 (MEDIUM) (AV:N/AC:M/Au:N/C:P/I:P/A:P) (legend)
Impact Subscore: 6.4
Exploitability Subscore: 8.6
Writer and Reporter: Wang Jing [CCRG, Nanyang Technological University
(NTU), Singapore]







*Suggestion Details:*


*(1) Vendor & Product Description:*


*Vendor:*
6kbbs



*Product & Vulnerable Versions:*
6kbbs
v7.1
v8.0



*Vendor URL & download:*
6kbbs can be gain from here,
http://www.6kbbs.com/download.html
http://en.sourceforge.jp/projects/sfnet_buzhang/downloads/6kbbs.zip/



*Product Introduction Overview:*
"6kbbs V8.0 is a PHP + MySQL built using high-performance forum, has the
code simple, easy to use, powerful, fast and so on. It is an excellent
community forum program. The program is simple but not simple; fast, small;
Interface generous and good scalability; functional and practical pursuing
superior performance, good interface, the user's preferred utility
functions."

"1, using XHTML + CSS architecture, so that the structure of the page,
saving transmission static page code, but also easy to modify the
interface, more in line with WEB standards; 2, the Forum adopted Cookies,
Session, Application and other technical data cache on the forum, reducing
access to the database to improve the performance of the Forum. Can carry
more users simultaneously access; 3, the data points table function, reduce
the burden on the amount of data when accessing the database; 4, support
for multi-skin style switching function; 5, the use of RSS technology to
support subscriptions forum posts, recent posts, user's posts; 6, the
display frame mode + tablet mode, the user can choose according to their
own preferences to; 7. forum page optimization keyword search, so the forum
more easily indexed by search engines; 8, extension, for our friends to
provide a forum for a broad expansion of space services; 9, webmasters can
add different top and bottom of the ad, depending on the layout; 10, post
using HTML + UBB way the two editors, mutual conversion, compatible with
each other; ..."




*(2) Vulnerability Details:*
6kbbs web application has a security bug problem. It can be exploited by
CSRF (Cross-Site Request Forgery) attacks. This may allow an attacker to
trick the victim into clicking on the image to take advantage of the trust
relationship between the authenticated victim and the application. Such an
attack could trick the victim into creating files that may then be called
via a separate CSRF attack or possibly other means, and executed in the
context of their session with the application, without further prompting or
verification.

Several 6kbbs products 0-day vulnerabilities have been found by some other
bug hunter researchers before. 6kbbs has patched some of them. Open Sourced
Vulnerability Database (OSVDB) is an independent and open-sourced database.
The goal of the project is to provide accurate, detailed, current, and
unbiased technical information on security vulnerabilities. The project
promotes greater, open collaboration between companies and individuals. It
has published suggestions, advisories, solutions details related to 6kbbs
vulnerabilities.


*(2.1) *The first code programming flaw occurs at
"/portalchannel_ajax.php?" page with "&id" and &code" parameters in HTTP
$POST.

*(2.2) *The second code programming flaw occurs at "/admin.php?" page with
"&fileids" parameter in HTTP $POST.






*References:*
http://www.tetraph.com/security/csrf-vulnerability/6kbbs-v8-0-multiple-csrf-cross-site-request-forgery-security-vulnerabilities/
http://securityrelated.blogspot.com/2015/04/6kbbs-v80-multiple-csrf-cross-site.html
http://www.inzeed.com/kaleidoscope/computer-web-security/6kbbs-v8-0-multiple-csrf-cross-site-request-forgery-security-vulnerabilities/
http://diebiyi.com/articles/%E5%AE%89%E5%85%A8/6kbbs-v8-0-multiple-csrf-cross-site-request-forgery-security-vulnerabilities/
https://hackertopic.wordpress.com/2015/04/02/6kbbs-v8-0-multiple-csrf-cross-site-request-forgery-security-vulnerabilities/
http://static-173-79-223-25.washdc.fios.verizon.net/?a=139222176300014&r=1&w=2
http://packetstormsecurity.com/files/authors/11270
http://www.osvdb.org/show/osvdb/105842
http://milw00rm.com/exploits/7889




--
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://twitter.com/justqdjing

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