CVE-2006-3428 in Ttcalc Script
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in TigerTom TTCalc 1.0 allows remote attackers to inject arbitrary web script or HTML via the year parameter in (1) loan.php and (2) mortgage.php.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 09/20/2017
The vulnerability identified as CVE-2006-3428 represents a critical cross-site scripting flaw within the TigerTom TTCalc 1.0 web application, specifically affecting the loan.php and mortgage.php pages. 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. The flaw manifests when the application fails to properly sanitize or validate user input submitted through the year parameter, creating an avenue for malicious actors to inject arbitrary web scripts or HTML content into the application's response.
The technical implementation of this vulnerability occurs at the input validation layer where the year parameter received from user requests is directly incorporated into the web page output without adequate sanitization. When a remote attacker submits malicious input through the year parameter in either loan.php or mortgage.php, the application processes this data without proper encoding or filtering mechanisms. This allows attackers to embed JavaScript code, HTML tags, or other malicious content that gets executed in the context of other users' browsers who view the affected pages. The vulnerability is particularly concerning because it affects core financial calculation pages where users might trust the application's output, making the attack vector more effective.
The operational impact of this vulnerability extends beyond simple data theft or defacement, as it enables attackers to potentially hijack user sessions, steal sensitive financial information, or redirect users to malicious websites. The attack surface is significant since both loan.php and mortgage.php pages are likely to be accessed by users performing financial calculations, making them prime targets for exploitation. Users who visit these pages after an attacker has injected malicious code could unknowingly execute harmful scripts that may capture their keystrokes, steal cookies, or perform unauthorized transactions on their behalf. This vulnerability also represents a potential vector for more sophisticated attacks such as credential harvesting or browser exploitation techniques that could leverage the initial XSS payload to establish persistent access.
Security mitigations for this vulnerability should focus on implementing robust input validation and output encoding mechanisms. The most effective approach involves sanitizing all user-supplied input, particularly the year parameter, through proper encoding before rendering any content in the web response. This includes implementing proper HTML entity encoding for any data that will be displayed in the browser context. Additionally, developers should implement Content Security Policy (CSP) headers to limit script execution and prevent unauthorized code injection. The vulnerability also highlights the importance of following secure coding practices such as those outlined in the OWASP Top Ten and the CWE guidelines for preventing XSS attacks. Organizations should also consider implementing web application firewalls and regular security testing to identify similar vulnerabilities in their web applications, as this flaw represents a classic example of inadequate input validation that could affect any application processing user-supplied data without proper sanitization. The ATT&CK framework categorizes this vulnerability under the T1059.007 technique for 'Command and Scripting Interpreter: JavaScript' as it enables attackers to execute malicious JavaScript code through the vulnerable web interface.