CVE-2001-0970 in TD Forum
Summary
by MITRE
Cross-site scripting vulnerability in TDForum 1.2 CGI script (tdforum12.cgi) allows remote attackers to execute arbitrary script on other clients via a forum message that contains the script.
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Analysis
by VulDB Data Team • 11/12/2024
The vulnerability identified as CVE-2001-0970 represents a classic cross-site scripting flaw within the TDForum 1.2 web application, specifically affecting the tdforum12.cgi CGI script. This issue stems from inadequate input validation and output sanitization mechanisms that fail to properly escape or filter user-supplied data before rendering it within web pages. The vulnerability allows malicious actors to inject malicious scripts into forum messages that are subsequently executed by other users who view these posts, creating a persistent threat vector that can compromise user sessions and data confidentiality.
The technical nature of this vulnerability aligns with CWE-79, which specifically addresses cross-site scripting weaknesses in web applications. This flaw operates by exploiting the web application's failure to properly sanitize user inputs, particularly in forum message fields where users can submit content without proper validation. When a malicious user submits a post containing script code within the message body, the vulnerable application fails to encode or escape special characters that could be interpreted as executable code by web browsers. The vulnerability is classified as a reflected XSS issue since the malicious payload is reflected back to users through the forum interface without proper sanitization.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable attackers to perform session hijacking, steal cookies, redirect users to malicious sites, or even perform actions on behalf of authenticated users. In the context of a forum application, this creates a particularly dangerous scenario where malicious actors can compromise multiple users simultaneously, as forum messages are typically designed to be viewed by numerous participants. The vulnerability affects the integrity of the entire communication platform, potentially allowing attackers to spread malware, conduct phishing attacks, or exfiltrate sensitive information from user sessions.
The attack vector for this vulnerability is straightforward and requires minimal technical expertise, making it particularly dangerous in environments where user-generated content is common. Attackers need only submit a malicious post containing script code that targets the specific browser and application configuration of the target users. The vulnerability's persistence stems from the fact that once malicious content is posted, it continues to affect users who view the forum until the content is removed or the vulnerability is patched. Security practitioners should note that this vulnerability demonstrates the critical importance of implementing proper input validation and output encoding mechanisms, as highlighted in the OWASP Top Ten security risks and the ATT&CK framework's methodology for web application exploitation techniques.
Mitigation strategies for CVE-2001-0970 should focus on implementing comprehensive input sanitization and output encoding measures within the TDForum application. Organizations should immediately apply patches or updates provided by the vendor to address the vulnerability, while implementing additional defensive measures such as content security policies, proper HTML escaping of user inputs, and regular security audits of web applications. The remediation process should include validating all user-supplied data against a strict whitelist of acceptable characters and implementing proper output encoding for all dynamic content. Additionally, security monitoring should be enhanced to detect and prevent the posting of suspicious content, while user education regarding the risks of clicking on untrusted links or content should be emphasized to reduce the overall attack surface and potential impact of such vulnerabilities.