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Cross-site Scripting (XSS) Vulnerabilities in CruxPA

Advisory ID:HTB22449
Vulnerable Versions:2.00 and probably prior
Tested Version:2.00
Advisory Publication:June 21, 2010 [without technical details]
Vendor Notification:June 21, 2010
Public Disclosure:July 5, 2010
Vulnerability Type:Cross-Site Scripting [CWE-79]
Cross-Site Scripting [CWE-79]
CVE Reference:CVE-2010-2718
Risk Level:Medium
CVSSv2 Base Scores:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
4 (AV:N/AC:L/Au:S/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 multiple vulnerabilities in CruxPA which could be exploited to perform cross-site scripting and script insertion attacks.

1) Cross-site scripting (XSS) vulnerability in CruxPA: CVE-2010-2718
The vulnerability exists due to input sanitation error in the "txtusername" parameter in login.php. A remote attacker can send a specially crafted HTTP POST request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website.
Exploitation example:
<form method="POST" action="http://host/login.php" name="main">
<input type=hidden name=txtusername value='"><script>alert(document.cookie)</script>'>
<input type=hidden name=txtpassword value=''>
<input type=hidden name=cmdSubmit value='Submit'>

2) Script insertion vulnerabilities in CruxPA: CVE-2010-2718
An input sanitation error exists in the multiple fields in newtodo.php, newtelephone.php and newappointment.php scripts. A remote attacker can insert arbitrary HTML and script code, which will be executed in user`s browser in context of the vulnerable website when the user visits calendar.php or todo.php pages.

ImmuniWeb® On-Demand Web Application Penetration Test

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.

[1] High-Tech Bridge Advisory HTB22449 - - Cross-site Scripting (XSS) Vulnerabilities in CruxPA
[2] CruxPA - - CruxPA is a simple web-based CRM system to keep track of tasks, appointments and customers.
[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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