SeaCMS Remote Code Execution Scanner

SeaCMS is widely used by content creators and website administrators to manage and display video content online. Developed primarily for video content management, it allows users to streamline the process of uploading, categorizing, and embedding videos. Its robust features make it a choice platform for smaller websites and hubs focusing on multimedia content delivery. Administrators appreciate its user-friendly interface that simplifies content management while maintaining a professional look for end-users. The system supports numerous multimedia formats and integrates smoothly with various external services, enhancing its adaptability in diverse environments. Overall, SeaCMS's flexibility and rich feature set meet the demands of publishers seeking to deliver multimedia content efficiently.

The Remote Code Execution (RCE) vulnerability present in SeaCMS allows attackers to execute arbitrary PHP code on the server. This significant security flaw can be exploited remotely by unauthenticated attackers. By leveraging this vulnerability, malicious actors can gain unauthorized control over the webserver, perform arbitrary operations, and compromise sensitive data. It typically arises from improper input validation or sanitization, making server resources vulnerable to unauthorized commands. RCE poses a critical risk, potentially leading to full system compromise if left unpatched. It highlights the necessity of rigorous code auditing and security practices in web application development.

The vulnerability in SeaCMS 6.4.5 provides a route for attackers via the 'search.php' endpoint with the parameter 'searchtype'. The exploit involves sending crafted POST requests that manipulate logical conditions in the script, injecting arbitrary PHP code. The absence of proper input sanitization allows for executing commands by altering the control flow using logical conditions. By exploiting this flaw, attackers can insert and execute malicious PHP code, thereby gaining unauthorized access and control. Verifying the attack success involves checking server responses for specific identifiers, like MD5 hashes, indicating code execution. This is a classic case of server-side script manipulation, a common vector for RCE attacks.

An RCE vulnerability like the one in SeaCMS can have severe consequences if exploited. Attackers can assume control of the application server, potentially exfiltrating data and disrupting services. It can lead to data breaches, where sensitive user and system data could be accessed or corrupted. Further, attackers might use the server as a foothold for lateral movement within the network, amplifying the damage. Malicious payloads can be deployed, resulting in data loss or ransomware installation. The organization’s reputation and financial health could suffer due to these breaches, emphasizing the critical nature of addressing such vulnerabilities swiftly.

REFERENCES

• https://mengsec.com/2018/08/06/SeaCMS-v6-45前台代码执行漏洞分析/