CVE-2003-1182 in Guestbook
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in MPM Guestbook 1.2 allows remote attackers to inject arbitrary web script or HTML via the lng parameter.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 08/12/2024
The CVE-2003-1182 vulnerability represents a classic cross-site scripting flaw discovered in MPM Guestbook version 1.2, a web application designed for guestbook functionality. This vulnerability resides within the application's input validation mechanisms and specifically targets the lng parameter which is used to determine language settings. The flaw allows remote attackers to execute malicious scripts in the context of other users' browsers, creating a significant security risk for any website utilizing this vulnerable software. The vulnerability's classification as a persistent XSS issue means that malicious payloads can be stored and executed whenever affected users access the guestbook interface, making it particularly dangerous for public-facing web applications.
The technical implementation of this vulnerability stems from inadequate sanitization of user-supplied input within the lng parameter processing logic. When the application receives a request containing the lng parameter, it fails to properly validate or escape the input before incorporating it into the web page output. This allows attackers to inject malicious HTML or JavaScript code that gets executed in the browser context of legitimate users who view the guestbook entries. The vulnerability specifically affects the language selection functionality where the lng parameter is used to determine which language-specific content to display, but the application does not properly sanitize this input before rendering it to the user interface. This flaw directly aligns with CWE-79 which defines the common weakness of insufficient input validation leading to XSS attacks.
The operational impact of this vulnerability extends beyond simple script execution, as it enables attackers to perform various malicious activities including session hijacking, credential theft, and redirection to malicious sites. An attacker could inject a script that steals cookies from users' browsers, potentially compromising their authentication sessions and gaining unauthorized access to the guestbook administration functions. The vulnerability also allows for more sophisticated attacks such as defacement of the guestbook content, data exfiltration, or even the creation of backdoors within the web application. Given that guestbooks are often publicly accessible and may contain user comments, this vulnerability could affect a wide range of users who visit the affected website. The attack surface is particularly concerning as the vulnerability requires minimal privileges to exploit and can be automated, making it attractive to threat actors seeking to compromise web applications at scale.
Security mitigations for CVE-2003-1182 should focus on implementing proper input validation and output encoding mechanisms within the application. The most effective immediate solution involves sanitizing all user-supplied input including the lng parameter through strict validation that rejects or encodes potentially dangerous characters. Implementing a whitelist approach for language parameters would prevent arbitrary code injection by only allowing predefined valid language codes. Additionally, the application should employ proper HTML escaping or encoding when rendering user input to prevent script execution in the browser context. Organizations should also consider implementing Content Security Policy (CSP) headers as an additional defense-in-depth measure to mitigate the impact of potential XSS attacks. The vulnerability's remediation aligns with ATT&CK technique T1566 which covers social engineering through malicious links, and specifically addresses the execution of malicious code through web-based interfaces. Regular security assessments and input validation reviews should be conducted to prevent similar vulnerabilities in other web applications, particularly those handling user-generated content.