CVE-2009-0103 in PlaySMS
Summary
by MITRE
Multiple PHP remote file inclusion vulnerabilities in playSMS 0.9.3 allow remote attackers to execute arbitrary PHP code via a URL in the (1) apps_path[plug] parameter to plugin/gateway/gnokii/init.php, the (2) apps_path[themes] parameter to plugin/themes/default/init.php, and the (3) apps_path[libs] parameter to lib/function.php.
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Analysis
by VulDB Data Team • 11/21/2024
The vulnerability described in CVE-2009-0103 represents a critical remote code execution flaw within the playSMS messaging platform version 0.9.3. This vulnerability stems from improper input validation and sanitization mechanisms that fail to adequately restrict user-supplied data from being processed as part of file inclusion operations. The affected parameters apps_path[plug], apps_path[themes], and apps_path[libs] are all susceptible to malicious manipulation through remote file inclusion attacks, allowing attackers to inject and execute arbitrary PHP code on the target system. These vulnerabilities are particularly dangerous because they occur within core application initialization files that handle essential system functionality, providing attackers with direct access to execute commands with the privileges of the web server process.
The technical implementation of this vulnerability aligns with common remote file inclusion patterns that fall under CWE-88, which describes improper neutralization of special elements used in an expression. The flaw occurs when the application accepts user input through the apps_path parameter and directly incorporates it into file inclusion functions without proper validation or sanitization. Attackers can exploit this by crafting malicious URLs that point to remote servers hosting malicious PHP payloads, which then get executed within the context of the vulnerable application. The vulnerability specifically affects three distinct entry points within the application's architecture, each representing a different aspect of the system's file handling mechanisms. The plugin/gateway/gnokii/init.php file handles gateway functionality, the plugin/themes/default/init.php manages theme rendering, and the lib/function.php file contains core library functions, all of which are susceptible to the same exploitation technique.
The operational impact of this vulnerability extends far beyond simple code execution, as it provides attackers with complete control over the affected system. Successful exploitation can lead to unauthorized access to sensitive data, system compromise, and potential lateral movement within network environments. The vulnerability can be exploited through simple HTTP requests that manipulate the affected parameters, making it particularly dangerous for publicly accessible web applications. According to ATT&CK framework, this vulnerability maps to T1190 - Exploit Public-Facing Application, which describes techniques used to compromise systems through publicly accessible applications. The attack surface is further expanded by the fact that these parameters are likely accessible through multiple application interfaces, potentially allowing for various attack vectors including web interface manipulation, API endpoints, or direct URL manipulation.
Mitigation strategies for this vulnerability require immediate implementation of input validation and sanitization measures across all affected application components. The most effective approach involves implementing strict parameter validation that rejects any input containing URLs or external references, ensuring that only local paths are accepted for file inclusion operations. Organizations should also implement proper access controls and network segmentation to limit exposure of vulnerable applications to untrusted networks. The implementation of web application firewalls and security monitoring systems can help detect and prevent exploitation attempts. Additionally, regular security audits and vulnerability assessments should be conducted to identify similar issues in other application components. According to industry best practices, this vulnerability should be addressed through immediate patching or code modification, as the risk of exploitation remains high given the widespread availability of exploitation tools and the minimal effort required for successful attacks. The vulnerability also highlights the importance of following secure coding practices such as those outlined in the OWASP Top Ten and ISO/IEC 27001 standards, which emphasize input validation and secure file handling as fundamental security controls.