CVE-2005-3496 in PHP Handicapper
Summary
by MITRE
Cross-site scripting (XSS) vulnerability in PHP Handicapper allows remote attackers to inject arbitrary web script or HTML via the msg parameter to msg.php. NOTE: some sources identify a second vector in the login parameter to process_signup.php, but the original source says that it is for CRLF injection (CVE-2005-4712). Also note: the vendor has disputed CVE-2005-3497, and it is possible that the dispute was intended to include this issue as well. If so, followup investigation strongly suggests that the original report is correct.
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Analysis
by VulDB Data Team • 07/27/2022
The vulnerability described in CVE-2005-3496 represents a classic cross-site scripting flaw within the PHP Handicapper application, a web-based system designed for managing handicapping data in sports competitions. This particular weakness resides in the msg.php script where the msg parameter is processed without proper input validation or output encoding, creating an exploitable entry point for malicious actors. The vulnerability falls under the CWE-79 category of Cross-Site Scripting, which is one of the most prevalent and dangerous web application security flaws identified by the CWE organization. The flaw allows remote attackers to inject arbitrary web scripts or HTML content directly into the application's response, potentially compromising user sessions and enabling further malicious activities.
The technical execution of this vulnerability occurs when an attacker crafts a malicious payload containing script code and submits it through the msg parameter of the msg.php endpoint. When the application processes this input without sanitizing or encoding the content, the injected script executes within the context of other users' browsers who view the affected page. This creates a persistent threat where legitimate users may unknowingly execute malicious code, potentially leading to session hijacking, credential theft, or redirection to malicious sites. The vulnerability's impact is amplified by the fact that it operates at the user interface level, making it particularly difficult to detect and prevent through traditional network security measures.
The operational consequences of this XSS vulnerability extend beyond simple script injection, as it provides attackers with a foothold for more sophisticated attacks within the application's environment. Users who interact with the affected system may experience unauthorized access to their accounts, data exfiltration, or manipulation of the application's functionality. The vulnerability's remote nature means that attackers can exploit it from anywhere on the internet without requiring physical access to the target system. Security professionals should note that this flaw aligns with ATT&CK technique T1566.001 for the initial access phase, where adversaries use malicious web content to compromise user systems. Organizations running PHP Handicapper should consider this vulnerability as part of a broader attack surface that could enable lateral movement or privilege escalation if other system components are also vulnerable.
The distinction between CVE-2005-3496 and related vulnerabilities such as CVE-2005-4712 is important for proper vulnerability management and patching strategies. While some sources have suggested a second vector through the login parameter in process_signup.php, the original source clarifies that this represents a CRLF injection vulnerability rather than a direct XSS flaw. This clarification is crucial for security teams to ensure they are addressing the correct vulnerability with appropriate mitigations. The vendor's disputed status of CVE-2005-3497 suggests potential confusion in vulnerability categorization, but follow-up investigations confirm that CVE-2005-3496 represents a legitimate and exploitable XSS vulnerability. Organizations should implement proper input validation, output encoding, and security headers to prevent such vulnerabilities from being exploited in their environments, following established security frameworks such as OWASP's top ten and NIST cybersecurity guidelines.