CVE-2003-1293 in Guestbookhost
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in NukedWeb GuestBookHost allow remote attackers to inject arbitrary web script or HTML via the (1) Name, (2) Email and (3) Message fields when signing the guestbook.
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Analysis
by VulDB Data Team • 07/04/2017
The vulnerability identified as CVE-2003-1293 represents a critical security flaw in the NukedWeb GuestBookHost application that exposes users to cross-site scripting attacks. This vulnerability resides in the guestbook submission functionality where user input is not properly sanitized before being rendered back to other users. The attack vector specifically targets three input fields: Name, Email, and Message, which are all susceptible to malicious script injection. The flaw allows remote attackers to execute arbitrary web scripts or HTML code within the context of other users' browsers, potentially leading to session hijacking, credential theft, or further exploitation of the affected system.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the guestbook application's processing logic. When users submit entries through the Name, Email, or Message fields, the application fails to properly sanitize or escape special characters that could be interpreted as HTML or JavaScript code. This lack of proper sanitization creates an environment where attackers can embed malicious payloads that execute when other users view the guestbook entries. The vulnerability is classified under CWE-79 as Improper Neutralization of Input During Web Page Generation, which specifically addresses the failure to properly escape or encode user-supplied data before incorporating it into web pages.
The operational impact of this vulnerability extends beyond simple script execution, as it can be leveraged for more sophisticated attacks within the context of the web application. An attacker could craft malicious entries that redirect users to phishing sites, steal session cookies, or even inject malicious code that persists across multiple user sessions. The guestbook functionality typically serves as a public-facing element where users interact with the application, making it an ideal vector for widespread exploitation. When combined with the fact that the vulnerability affects multiple input fields, the attack surface increases significantly, allowing for more varied and potentially damaging payloads. This vulnerability directly maps to several techniques documented in the ATT&CK framework under T1566 as "Phishing" and T1059 as "Command and Scripting Interpreter," as attackers can use the XSS to execute malicious code in victim browsers.
Mitigation strategies for this vulnerability must focus on implementing robust input validation and output encoding mechanisms throughout the application's data processing pipeline. The primary defense involves sanitizing all user input before it is stored or displayed, using proper HTML escaping techniques to prevent script execution. Developers should implement a whitelist approach for acceptable input characters and employ Content Security Policy headers to further limit the execution of unauthorized scripts. Additionally, the application should implement proper session management and input length restrictions to minimize the potential impact of successful attacks. Regular security auditing and penetration testing should be conducted to identify similar vulnerabilities in other application components, as this type of flaw often indicates broader security gaps in web application development practices. The vulnerability serves as a reminder of the critical importance of implementing defense-in-depth strategies and proper secure coding practices to prevent such widespread client-side attacks that can compromise entire user bases.