CVE-2007-2857 in Php Excel Parser
Summary
by MITRE
PHP remote file inclusion vulnerability in sample/xls2mysql in ABC Excel Parser Pro 4.0 allows remote attackers to execute arbitrary PHP code via a URL in the parser_path parameter.
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Analysis
by VulDB Data Team • 05/03/2025
The vulnerability identified as CVE-2007-2857 represents a critical remote file inclusion flaw within the ABC Excel Parser Pro 4.0 software suite, specifically affecting the sample/xls2mysql component. This vulnerability resides in the application's handling of user-supplied input through the parser_path parameter, which is processed without adequate validation or sanitization. The flaw allows malicious actors to inject arbitrary URLs that are subsequently included and executed as PHP code on the target server, creating a pathway for remote code execution that can be leveraged for complete system compromise. The vulnerability is classified under CWE-88, which describes improper neutralization of special elements used in an OS command, and more specifically aligns with CWE-94, which addresses the execution of arbitrary code due to improper input validation. This weakness directly enables attackers to execute malicious payloads through the web application's interface, making it a significant concern for system administrators and security professionals.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL and passes it through the parser_path parameter in the sample/xls2mysql script. The application fails to validate or sanitize this input before using it in a file inclusion operation, allowing the PHP interpreter to fetch and execute code from the remote server specified in the URL. This process typically involves a GET request to the vulnerable endpoint with a crafted parameter value that points to an external malicious PHP script. The vulnerability is particularly dangerous because it operates at the application layer, bypassing traditional network-level security controls and allowing attackers to execute code with the privileges of the web server process. The attack chain follows the typical remote code execution pattern outlined in the MITRE ATT&CK framework under the technique T1059.007 for command and script injection, and T1190 for exploitation of remote services.
The operational impact of this vulnerability extends far beyond simple code execution, as it provides attackers with complete control over the affected web server and potentially the entire underlying infrastructure. Successful exploitation can lead to data breaches, system compromise, and the establishment of persistent backdoors within the network. The vulnerability affects organizations using ABC Excel Parser Pro 4.0, particularly those with web applications that process Excel files through this component, creating a risk for businesses in sectors such as finance, healthcare, and government where data security is paramount. Organizations may face regulatory compliance violations, financial losses, and reputational damage following successful exploitation. The vulnerability also impacts the broader ecosystem of PHP applications that may be vulnerable to similar remote file inclusion flaws, as it demonstrates the critical importance of input validation and secure coding practices. Security teams must consider the potential for lateral movement within networks once initial access is gained, as the compromised server could serve as a launching point for further attacks against internal systems. The vulnerability also highlights the importance of proper application hardening and the implementation of security controls such as input validation, output encoding, and the principle of least privilege.
Mitigation strategies for CVE-2007-2857 should begin with immediate patching of the affected software, as ABC Excel Parser Pro 4.0 has been superseded by newer versions that address this vulnerability. Organizations should implement input validation and sanitization measures that prevent URL injection in critical parameters, using allowlists of acceptable values rather than denylists that are inherently flawed. Web application firewalls can be configured to detect and block suspicious URL patterns in HTTP requests, while proper configuration of PHP settings such as allow_url_include and allow_url_fopen should be disabled to prevent remote file inclusion operations. Regular security assessments and code reviews should focus on identifying similar vulnerabilities in custom applications, particularly those involving file inclusion operations. Network segmentation and the principle of least privilege should be enforced to limit the potential impact of successful exploitation. Additionally, organizations should maintain up-to-date vulnerability management processes that include automated scanning for known vulnerabilities, regular security training for developers, and incident response procedures that can be activated immediately upon detection of exploitation attempts. The vulnerability serves as a reminder of the critical importance of secure coding practices and the need for continuous security monitoring in modern web applications.