##########################www.BugReport.ir########################################
#
#        AmnPardaz Security Research Team
#
# Title:    ACollab Multiple Vulnerabilities
# Vendor:    http://www.atutor.ca/acollab
# Vulnerable Version:  1.2 (Latest version till now)
# Exploitation:    Remote with browser
# Fix:          N/A
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- Description:
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ACollab as described by its vendor is an accessible, open source,  
multi-group, Web-based collaborative
work environment. ACollab is available as a standalone collaborative  
work environment that will run on
its own. ACollab is ideal for groups working at a distance developing  
documentation, collaborating on
research, or writing joint papers.


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- Vulnerability:
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+--> SQL Injection
  All of the parameters are sanitized correctly before being used in  
SQL queries else of
  the POST parameters 'login' and 'password' in the "sign_in.php" page.  
These parameters
  can be used for injecting arbitrary SQL queries; the 'login'  
parameter is single quoted
  and the 'password' parameter is single parenthesized, single quoted.

+--> Authentication Bypass
  The ACollab CMS uses two mechanism for authentication. One for master  
admin user which is
  based on a hard coded username/password initialized in the  
installation process. And a DB-based
  authentication for all other users, including the group  
administrators which can add/remove/edit
  all posts and news and ... from forums and first screen of the  
website. The second authentication
  mechanism can be bypassed.

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- Exploits/PoCs:
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+--> Exploiting The (MySQL) SQL Injection Vulnerability:
  Go to the sign in page at "victim.net/ACollab/sign_in.php" and use  
the following vectors for injecting
  your desired SQL query, namely $Q:
    - In the Username field (login POST parameter): ' or $Q or ''='
    - In the Password field (password POST parameter): ') or $Q or (''='

+--> Exploiting The Authentication Bypass Vulnerability:
  You can login as anyone of the registered users of ACollab CMS by  
providing following vector
  as username and nothing as password:
    'or''='' limit 1 offset 0 -- '
  Above vector will log you as the first user according to its member  
id order. You can login as other
  users, searching for a group administrator account, by following vectors:
    'or''='' limit 1 offset 0 -- '
    'or''='' limit 1 offset 1 -- '
    'or''='' limit 1 offset 2 -- '
      ....

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- Solution:
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Add the following command
     $_POST['login'] = addslashes ($_POST['login']);  
$_POST['password'] = addslashes ($_POST['password']);
at the line 46 of 'sign_in.php' file.

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- Original Advisory:
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http://www.bugreport.ir/index_72.htm

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- Credit:
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AmnPardaz Security Research & Penetration Testing Group
Contact: admin[4t}bugreport{d0t]ir
www.BugReport.ir
www.AmnPardaz.com