CVE-2008-6359 in Max's Guestbook
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in index.php in Max s Guestbook allows remote attackers to inject arbitrary web script or HTML via the (1) name, (2) email, and (3) message parameters.
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Analysis
by VulDB Data Team • 08/04/2021
The CVE-2008-6359 vulnerability represents a classic cross-site scripting flaw in the Max s Guestbook application's index.php script. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, specifically manifesting as a reflected XSS attack vector. The flaw occurs when user-supplied input from three distinct parameters - name, email, and message - is not properly sanitized or encoded before being rendered back to the user interface. Attackers can exploit this weakness by crafting malicious payloads within these input fields that, when processed by the vulnerable application, get executed in the context of other users' browsers.
The technical implementation of this vulnerability stems from the application's failure to implement proper input validation and output encoding mechanisms. When a user submits data through the guestbook form, the index.php script directly incorporates these parameters into the HTML response without adequate sanitization. This creates an environment where malicious scripts can be injected and subsequently executed by unsuspecting visitors who view the guestbook entries. The reflected nature of this XSS means that the malicious payload is reflected off the web server and delivered to the victim's browser, making it particularly dangerous for web applications that display user-generated content.
The operational impact of this vulnerability extends beyond simple script execution, as it can be leveraged for various malicious activities within the context of the compromised web application. Attackers can use this vulnerability to steal session cookies, redirect users to malicious websites, deface the guestbook interface, or perform actions on behalf of authenticated users. The vulnerability affects the confidentiality, integrity, and availability of the web application's data and user interactions. From an attacker's perspective, this represents a low-hanging fruit vulnerability that can be exploited without requiring authentication, making it particularly attractive for automated exploitation tools and script kiddies.
Mitigation strategies for CVE-2008-6359 should focus on implementing robust input validation and output encoding practices. The most effective approach involves sanitizing all user input through proper escaping mechanisms before rendering any content back to the browser. This includes implementing context-specific encoding for HTML, JavaScript, and URL parameters. Organizations should also consider implementing Content Security Policy headers to limit the execution of unauthorized scripts. The vulnerability demonstrates the critical importance of following secure coding practices and adhering to the principle of least privilege in web application development. From an ATT&CK framework perspective, this vulnerability maps to T1059.007 (Scripting) and T1531 (Account Access Token Manipulation), highlighting the potential for privilege escalation and persistent access through the exploitation of such client-side vulnerabilities. Regular security assessments and input validation testing should be implemented to prevent similar vulnerabilities from emerging in future iterations of the application.