CVE-2011-3393 in MYRE Real Estate Software
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in findagent.php in MYRE Real Estate Software allow remote attackers to inject arbitrary web script or HTML via the (1) country1, (2) state1, or (3) city1 parameter.
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Analysis
by VulDB Data Team • 12/28/2024
The CVE-2011-3393 vulnerability represents a critical cross-site scripting flaw discovered in the findagent.php component of MYRE Real Estate Software version 2.0. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security weaknesses identified in the OWASP Top Ten. The vulnerability specifically affects three parameters within the findagent.php script, namely country1, state1, and city1, making it particularly concerning for real estate platforms that handle sensitive user data and location-based information. The flaw allows remote attackers to inject malicious scripts into web pages viewed by other users, creating a vector for various malicious activities including session hijacking, credential theft, and data exfiltration.
The technical implementation of this vulnerability stems from inadequate input validation and output sanitization within the findagent.php script. When users submit search queries containing location parameters such as country, state, or city, the application fails to properly sanitize these inputs before incorporating them into the web page response. This lack of proper input filtering creates an environment where attackers can embed malicious JavaScript code within the parameter values, which then gets executed in the context of other users' browsers. The vulnerability is classified as a reflected XSS attack since the malicious script is reflected off the web server and delivered to the victim's browser, making it particularly difficult to detect and prevent through traditional network monitoring approaches.
The operational impact of this vulnerability extends beyond simple script injection, creating significant risks for real estate software users and administrators. Attackers could exploit this weakness to steal user sessions, redirect victims to malicious websites, or even deface the real estate platform's content to spread malware. Given that real estate software typically handles sensitive personal information including user contact details, property listings, and transaction records, the potential for data compromise is substantial. The vulnerability affects the core functionality of the search feature, which is fundamental to any real estate platform's user experience, making it a particularly attractive target for attackers seeking to disrupt services or gain unauthorized access to user data. This type of vulnerability also violates the principle of least privilege and proper input validation that should be implemented in all web applications according to security best practices.
Mitigation strategies for CVE-2011-3393 should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application. The most effective approach involves sanitizing all user inputs through proper encoding before they are processed or displayed, particularly for parameters that are directly reflected in web page content. Implementing Content Security Policy headers can provide additional protection against XSS attacks by restricting the sources from which scripts can be loaded. Regular security audits and code reviews should be conducted to identify similar vulnerabilities in other components of the application. Organizations should also consider implementing web application firewalls and intrusion detection systems to monitor for suspicious activities targeting XSS vulnerabilities. The remediation process should include updating the MYRE Real Estate Software to a patched version that properly handles input validation and output encoding, while also establishing secure coding practices to prevent similar issues in future development cycles. According to ATT&CK framework, this vulnerability maps to T1059.007 for script injection techniques and T1566 for social engineering attacks that could be facilitated through the XSS vector.