CVE-2003-0769 in ICQ
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in the ICQ Web Front guestbook (guestbook.html) allows remote attackers to insert arbitrary web script and HTML via the message field.
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Analysis
by VulDB Data Team • 06/23/2024
The vulnerability identified as CVE-2003-0769 represents a classic cross-site scripting flaw within the ICQ Web Front guestbook component, specifically in the guestbook.html file. This type of vulnerability falls under the broader category of web application security weaknesses that have been consistently documented in industry standards such as CWE-79, which defines cross-site scripting as a weakness where untrusted data is sent to a web browser without proper validation or sanitization. The vulnerability specifically affects the guestbook functionality that allows users to submit messages, creating a potential attack vector where malicious actors can inject arbitrary HTML and JavaScript code into the web application's response.
The technical implementation of this vulnerability stems from inadequate input validation and output encoding within the guestbook.html script. When users submit messages through the guestbook interface, the application fails to properly sanitize the input data before rendering it back to other users browsing the guestbook. This lack of proper sanitization creates an environment where attackers can craft malicious payloads containing HTML tags or JavaScript code within the message field. The vulnerability is classified as a reflected XSS attack since the malicious script is reflected back to users who view the guestbook entries without any server-side processing that would normally neutralize such content.
The operational impact of this vulnerability extends beyond simple data corruption or display issues. Attackers can exploit this weakness to perform session hijacking by injecting malicious scripts that steal cookies or session tokens from unsuspecting users who view the compromised guestbook entries. This capability enables unauthorized access to user accounts and potentially allows attackers to execute commands on behalf of legitimate users. The vulnerability also supports more sophisticated attacks such as phishing attempts where malicious scripts can redirect users to fraudulent websites or harvest sensitive information from user interactions with the compromised guestbook.
Security practitioners should recognize this vulnerability as a critical concern within web application security frameworks, particularly when considering the ATT&CK framework's methodology for identifying and mitigating web-based threats. The vulnerability's exploitation pathway aligns with ATT&CK technique T1059.007, which covers the use of scripting languages for code execution, and T1531, which addresses the use of malicious scripts to gain unauthorized access to systems. The impact assessment should consider both the immediate threat to user privacy and the potential for broader system compromise through session manipulation and credential theft.
Effective mitigation strategies for CVE-2003-0769 require implementing comprehensive input validation and output encoding mechanisms throughout the web application. The primary defense involves sanitizing all user-supplied input before rendering it within the guestbook display, ensuring that any HTML or JavaScript characters are properly escaped or removed. Additionally, implementing Content Security Policy (CSP) headers can provide an additional layer of protection by restricting the sources from which scripts can be executed within the guestbook context. Organizations should also consider implementing proper access controls and monitoring for unusual patterns in guestbook submissions that might indicate malicious activity. The vulnerability highlights the importance of secure coding practices and input validation as fundamental requirements for preventing XSS attacks, aligning with industry best practices established in standards such as OWASP Top Ten and NIST cybersecurity guidelines. Regular security testing and code reviews should be implemented to identify similar vulnerabilities across the entire web application infrastructure.