CVE-2006-3429 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 currency parameter in (1) loan.php and (2) mortgage.php. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.
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Analysis
by VulDB Data Team • 09/18/2017
The vulnerability identified as CVE-2006-3429 represents a critical cross-site scripting flaw in TigerTom TTCalc version 1.0, specifically affecting the loan.php and mortgage.php web pages. This security weakness stems from inadequate input validation and sanitization mechanisms within the application's currency parameter handling, creating an exploitable pathway for malicious actors to inject arbitrary web scripts or HTML code into the vulnerable web application. The vulnerability's classification aligns with CWE-79, which defines the common weakness underlying cross-site scripting attacks as the improper handling of untrusted input data that gets reflected back to users without proper sanitization or encoding.
The technical execution of this vulnerability occurs when remote attackers manipulate the currency parameter in the targeted web pages, allowing them to inject malicious scripts that execute in the context of other users' browsers. This type of attack falls under the ATT&CK technique T1566.001, specifically targeting the web application layer through malicious input injection. The flaw exists because the application fails to properly validate or escape user-supplied input before incorporating it into dynamically generated web content, creating a persistent vector for script execution. The vulnerability affects both loan.php and mortgage.php pages, indicating a systemic issue within the application's parameter handling rather than isolated to a single endpoint.
The operational impact of this vulnerability extends beyond simple script injection, as it enables attackers to potentially steal user sessions, redirect victims to malicious sites, or perform actions on behalf of authenticated users. This type of attack can compromise user data, manipulate application functionality, and potentially serve as a foothold for more sophisticated attacks within the network. The vulnerability's presence in a financial calculation application like TigerTom TTCalc poses particular risk, as users may be more trusting of financial calculators and less vigilant about potential security threats. The attack vector requires no special privileges or access to the system itself, making it particularly dangerous as it can be exploited from any location with internet access.
Mitigation strategies for this vulnerability should focus on implementing robust input validation and output encoding mechanisms throughout the application. The recommended approach involves sanitizing all user-provided input parameters, particularly those used in dynamic content generation, and applying proper HTML encoding before rendering any user-supplied data. Organizations should implement Content Security Policy headers to limit script execution capabilities and employ web application firewalls to detect and block malicious input patterns. The fix should address the root cause by ensuring that all currency parameter values undergo proper validation against expected data formats and ranges. Additionally, regular security testing including dynamic application security testing and manual code review should be implemented to identify similar vulnerabilities in other application components. This vulnerability demonstrates the critical importance of input validation and the principle of least privilege in web application security, aligning with security frameworks such as OWASP Top Ten and NIST cybersecurity guidelines for protecting against injection vulnerabilities.