CVE-2007-5221 in Poppawid
Summary
by MITRE
PHP remote file inclusion vulnerability in mail/childwindow.inc.php in Poppawid 2.7 allows remote attackers to execute arbitrary PHP code via a URL in the form parameter.
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Analysis
by VulDB Data Team • 10/07/2024
The vulnerability identified as CVE-2007-5221 represents a critical remote file inclusion flaw within the Poppawid 2.7 web application, specifically affecting the mail/childwindow.inc.php component. This vulnerability resides in the application's handling of user-supplied input through the form parameter, creating an avenue for malicious actors to inject and execute arbitrary PHP code on the target system. The flaw demonstrates characteristics consistent with CWE-88, which describes improper neutralization of special elements used in an expression, particularly in the context of remote file inclusion attacks. The vulnerability is classified under the ATT&CK technique T1190 - Exploit Public-Facing Application, as it allows adversaries to leverage publicly accessible web interfaces to gain unauthorized code execution capabilities.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious URL and passes it through the form parameter to the vulnerable script. The application fails to properly validate or sanitize the input, allowing the attacker to specify a remote URL that contains malicious PHP code. When the application includes this remote file, the PHP interpreter executes the malicious code within the context of the web server, potentially granting the attacker full control over the affected system. The vulnerability is particularly dangerous because it enables remote code execution without requiring authentication, making it an attractive target for automated attacks and exploitation by threat actors. The flaw essentially transforms the legitimate file inclusion mechanism into a vector for arbitrary code execution, bypassing normal security controls that would typically prevent such unauthorized access.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with persistent access to the target system and potentially enables further compromise of the broader network infrastructure. Successful exploitation can lead to complete system compromise, data exfiltration, and establishment of backdoors for continued unauthorized access. Organizations running Poppawid 2.7 are particularly vulnerable as this represents a fundamental flaw in the application's input handling and validation processes. The vulnerability's severity is amplified by its ease of exploitation, as demonstrated by the fact that it requires minimal technical expertise to leverage. This makes it a prime target for automated scanning tools and botnets that continuously search for and exploit such weaknesses in web applications. The vulnerability also highlights the importance of proper input validation and the dangers of allowing user-supplied data to influence file inclusion operations, a practice that violates fundamental security principles and creates dangerous attack surfaces.
Mitigation strategies for CVE-2007-5221 should focus on immediate patching of the vulnerable Poppawid 2.7 application to address the root cause of the vulnerability. Organizations should implement strict input validation and sanitization measures to prevent any user-supplied data from influencing file inclusion operations. The application should be configured to use absolute paths for file inclusion rather than allowing relative or remote URLs to be specified through user parameters. Network-level protections such as web application firewalls and intrusion prevention systems should be deployed to detect and block attempts to exploit this vulnerability. Additionally, organizations should conduct comprehensive vulnerability assessments to identify similar flaws in other applications and ensure that all web applications implement proper input validation and output encoding practices. Regular security updates and patches should be applied to all web applications to prevent exploitation of known vulnerabilities, and application developers should follow secure coding practices that prevent the use of user-supplied input in file inclusion operations. The vulnerability also underscores the necessity of implementing defense-in-depth strategies that include monitoring for suspicious file inclusion patterns and maintaining up-to-date threat intelligence to identify emerging exploitation attempts targeting similar vulnerabilities.