CVE-2003-0243 in Happymall
Summary
by MITRE
Happycgi.com Happymall 4.3 and 4.4 allows remote attackers to execute arbitrary commands via shell metacharacters in the file parameter for the (1) normal_html.cgi or (2) member_html.cgi scripts.
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Analysis
by VulDB Data Team • 08/22/2025
This vulnerability represents a critical remote command execution flaw in the Happymall e-commerce platform version 4.3 and 4.4, distributed through Happycgi.com. The vulnerability stems from insufficient input validation and sanitization within two key CGI scripts: normal_html.cgi and member_html.cgi. Attackers can exploit this weakness by injecting shell metacharacters through the file parameter, which then gets processed without proper sanitization, allowing arbitrary command execution on the affected system. This type of vulnerability falls under the CWE-78 category known as "Improper Neutralization of Special Elements used in OS Command" and aligns with the ATT&CK technique T1059.001 for Command and Scripting Interpreter. The flaw essentially allows an attacker to execute system commands with the privileges of the web server process, potentially leading to complete system compromise.
The technical implementation of this vulnerability occurs when user-supplied input containing shell metacharacters such as semicolons, ampersands, or backticks is passed directly to system commands without proper filtering or escaping. The affected CGI scripts fail to validate or sanitize the file parameter, creating a pathway for attackers to inject malicious commands that get executed by the underlying operating system. This vulnerability is particularly dangerous because it allows attackers to perform actions such as reading sensitive files, executing additional malicious code, creating backdoors, or even escalating privileges within the system. The impact extends beyond simple command execution as it can lead to full system compromise and data exfiltration.
The operational impact of this vulnerability is severe and multifaceted, affecting organizations running affected versions of Happymall. Remote attackers can gain unauthorized access to the system and potentially use the compromised server as a launching point for further attacks within the network. This vulnerability also represents a significant risk for e-commerce operations as it can lead to data breaches, system downtime, and potential regulatory compliance violations. The exploitation of this vulnerability can result in complete loss of system integrity and availability, as attackers can manipulate the web application to perform unauthorized operations. Organizations may face financial losses, reputation damage, and legal consequences due to the exposure of sensitive customer data and system compromise.
Mitigation strategies for this vulnerability should focus on immediate patching of the affected software versions and implementation of proper input validation mechanisms. Organizations should ensure that all user-supplied input is properly sanitized and validated before being processed by system commands. The implementation of web application firewalls and input filtering rules can provide additional protection layers. Security teams should also conduct comprehensive vulnerability assessments to identify other potential injection points within the application. The use of parameterized queries and secure coding practices can prevent similar vulnerabilities from occurring in the future. Regular security updates and penetration testing should be implemented as part of the overall security posture to identify and remediate such critical flaws before they can be exploited by malicious actors.