CVE-2003-1384 in PY-Livredor
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in index.php in PY-Livredor 1.0 allows remote attackers to insert arbitrary web script or HTML via the (1) titre, (2) Votre pseudo, (3) Votre e-mail, or (4) Votre message fields.
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Analysis
by VulDB Data Team • 06/16/2018
The vulnerability described in CVE-2003-1384 represents a classic cross-site scripting flaw affecting PY-Livredor 1.0, a web-based guestbook application that was widely used in the early 2000s. This type of vulnerability falls under the broader category of injection attacks and specifically maps to CWE-79 which defines improper neutralization of input during web output. The flaw manifests in the index.php script where user-supplied data is directly incorporated into web responses without adequate sanitization or encoding mechanisms. The affected parameters include four distinct input fields: titre (title), Votre pseudo (your nickname), Votre e-mail (your email), and Votre message (your message), all of which can be exploited to inject malicious scripts.
The technical exploitation of this vulnerability occurs when an attacker crafts malicious input containing javascript code or html tags within any of the four vulnerable fields during guestbook submissions. When other users view the guestbook entries, the injected scripts execute in their browsers within the context of the vulnerable application's domain. This creates a persistent cross-site scripting attack vector where the malicious code can perform actions such as stealing session cookies, redirecting users to malicious sites, defacing the guestbook interface, or executing arbitrary commands on behalf of the victim. The vulnerability's impact is amplified by the fact that it affects core user input fields that are typically displayed without proper HTML encoding, making it particularly dangerous for web applications that rely on user-generated content.
From an operational perspective, this vulnerability presents significant security risks for organizations using PY-Livredor 1.0, as it enables attackers to compromise user sessions and potentially gain unauthorized access to sensitive information. The attack surface is broad since any user who can submit entries to the guestbook is potentially vulnerable, and the persistent nature of the flaw means that malicious content remains active until manually removed. The vulnerability aligns with ATT&CK technique T1566.001 which covers social engineering through malicious content, and T1059.007 which involves command and scripting interpreter through web scripts. The flaw demonstrates poor input validation practices and highlights the critical importance of implementing proper output encoding and sanitization mechanisms.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input sanitization and output encoding across all user-facing fields. The most effective approach involves encoding all user-supplied data before rendering it in web pages, particularly using HTML entity encoding for characters that could be interpreted as markup. Organizations should implement proper parameter validation to reject or sanitize potentially dangerous input patterns including common script tags, javascript protocols, and other malicious constructs. Additionally, the application should be updated to a patched version that properly handles user input through secure coding practices that prevent the direct inclusion of untrusted data into web responses. The remediation process should include thorough security testing of all input fields and the implementation of a content security policy to further limit the potential impact of any remaining vulnerabilities. This vulnerability underscores the fundamental principle that all user input must be treated as potentially malicious and properly validated before being processed or displayed within web applications.