CVE-2004-0673 in SCI Photo Chat
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in SCI Photo Chat Server 3.4.9 allows remote attackers to execute arbitrary web script as other users via an invalid request that is echoed in the resulting error message.
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Analysis
by VulDB Data Team • 01/23/2025
The CVE-2004-0673 vulnerability represents a classic cross-site scripting flaw in the SCI Photo Chat Server version 3.4.9, demonstrating how inadequate input validation can create persistent security risks in web applications. This vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and well-documented web application security weaknesses. The flaw specifically manifests when the server receives an invalid request that is subsequently reflected back in error messages without proper sanitization or encoding, creating an environment where malicious actors can inject arbitrary script code that executes in the context of other users' browsers.
The technical implementation of this vulnerability exploits the server's failure to properly validate and sanitize user input before incorporating it into error responses. When a remote attacker submits malformed requests to the photo chat server, the application processes these inputs and generates error messages that echo back the invalid data without adequate filtering. This creates a direct path for script injection where attackers can embed malicious javascript payloads within their requests, which then get executed when other users view the error messages. The vulnerability is particularly dangerous because it leverages the trust relationship between the server and its users, allowing attackers to impersonate legitimate users and potentially escalate their privileges or steal session cookies.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable various forms of malicious activity including session hijacking, data theft, and unauthorized access to user accounts. According to ATT&CK framework category T1059.007 for Command and Scripting Interpreter, this vulnerability allows adversaries to execute code in the context of other users, potentially leading to full system compromise. The risk is amplified by the fact that chat servers typically handle sensitive user interactions and personal data, making successful exploitation particularly damaging. Attackers could use this vulnerability to inject phishing scripts that steal user credentials, redirect users to malicious sites, or even deploy additional malware through the compromised user sessions.
Mitigation strategies for CVE-2004-0673 must address the fundamental input validation issues that enable the vulnerability. Organizations should implement comprehensive output encoding and sanitization mechanisms that prevent script execution in all response contexts, particularly error messages and user-generated content displays. The solution involves applying proper input validation at all entry points, using established security libraries and frameworks that automatically handle script encoding, and implementing Content Security Policy headers to limit script execution capabilities. Additionally, regular security audits and penetration testing should be conducted to identify similar vulnerabilities in legacy systems, as this type of flaw was common in web applications of that era and many organizations still maintain older systems with unpatched vulnerabilities. The remediation process requires not just immediate patching but also architectural improvements to prevent similar issues from emerging in future development cycles.