CVE-2007-5566 in PHPBlog
Summary
by MITRE
** DISPUTED ** Multiple PHP remote file inclusion vulnerabilities in PHPBlog 0.1 Alpha allow remote attackers to execute arbitrary PHP code via a URL in the blog_localpath parameter to (1) includes/functions.php or (2) includes/email.php. NOTE: this issue is disputed by CVE because the identified code is in functions that are not accessible via direct request.
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Analysis
by VulDB Data Team • 08/08/2024
The vulnerability identified as CVE-2007-5566 pertains to PHPBlog version 0.1 Alpha and involves multiple remote file inclusion flaws that could potentially allow attackers to execute arbitrary PHP code. This type of vulnerability falls under the category of insecure direct object references and remote code execution threats that have been extensively documented in cybersecurity literature. The specific flaw manifests when the blog_localpath parameter is manipulated in requests to two distinct files within the application's includes directory namely functions.php and email.php. These files are part of the application's core functionality and are designed to handle various operational tasks including system functions and email communications. The vulnerability represents a critical security risk as it could enable an attacker to inject malicious code into the web application's execution environment, potentially leading to complete system compromise.
The technical nature of this vulnerability stems from improper input validation and sanitization within the PHPBlog application's parameter handling mechanisms. When the blog_localpath parameter is passed to either of the vulnerable files, the application fails to properly validate or sanitize the input before using it in file inclusion operations. This creates an opportunity for attackers to manipulate the parameter value to include URLs that point to malicious remote resources. The vulnerability is classified as a remote file inclusion issue which is a well-known pattern in web application security that has been extensively catalogued in security databases and frameworks. According to CWE guidelines, this vulnerability would be categorized under CWE-829 as it involves inclusion of code from untrusted sources, and potentially under CWE-94 when the included code results in arbitrary code execution. The ATT&CK framework would classify this under T1190 for exploit public-facing application and T1059 for command and scripting interpreter, specifically PHP.
The operational impact of this vulnerability extends beyond simple code execution to encompass potential system compromise and data breaches. If successfully exploited, an attacker could gain unauthorized access to the web server hosting the PHPBlog application, potentially leading to unauthorized data access, modification, or deletion. The vulnerability's disputed nature regarding direct accessibility highlights the complexity of vulnerability assessment and the importance of understanding the complete attack surface. While CVE has noted that the identified code is not directly accessible via request, the existence of such vulnerabilities in the application's architecture still represents a significant security concern. The vulnerability demonstrates the importance of proper input validation and the principle of least privilege in web application design. Organizations using PHPBlog 0.1 Alpha or similar vulnerable applications face potential risks including unauthorized system access, data exfiltration, and service disruption. The indirect nature of exploitation through specific parameter manipulation means that administrators must also consider the broader context of how different application components interact and validate inputs.
Mitigation strategies for this vulnerability should focus on comprehensive input validation and sanitization mechanisms within the application's codebase. The most effective immediate solution involves implementing strict parameter validation that prevents any URL-based inputs from being processed in file inclusion operations. Security patches should be applied to remove or restrict the functionality that allows arbitrary path inclusion in the vulnerable files. Organizations should also implement proper access controls and network segmentation to limit exposure to potential attackers. Regular security audits and code reviews are essential to identify similar vulnerabilities in other parts of the application. The vulnerability serves as a reminder of the importance of secure coding practices and the need for continuous security monitoring. Additionally, implementing web application firewalls and intrusion detection systems can provide additional layers of protection against exploitation attempts. Organizations should also consider updating to newer versions of PHPBlog or migrating to more secure alternatives that have addressed these vulnerabilities. The disputed nature of this CVE entry underscores the need for careful vulnerability analysis and the importance of understanding both the technical implementation and the actual attack surface of web applications.