CNVD-2022-86535 Scanner

ThinkPHP is a widely used PHP framework employed by developers to build web applications efficiently. It supports clear syntax and is popular among web developers aiming for rapid application development and easy maintenance. The framework offers extensive features, including a robust MVC architecture, which can accommodate versatile web-related programming tasks. ThinkPHP is particularly praised for its simplicity, flexibility, and high performance, making it favorable for both beginner and advanced programmers. It is often utilized in online retail shops, social media sites, and content management systems, where reliable and fast backends are necessary. Given its popularity, ensuring its security is paramount to protect sensitive applications from exploitation.

The Remote Code Execution (RCE) vulnerability identified in ThinkPHP allows attackers to execute arbitrary commands on the hosting server. This vulnerability arises from improper filtering of parameters when the multi-language function is enabled, resulting in potential command injection. Attackers can exploit this to gain unauthorized access and execute any command, compromising the integrity of the server. Such vulnerabilities often lead to severe security breaches, including data theft and complete server control. It is crucial for developers using ThinkPHP to recognize this risk and apply necessary security patches. This vulnerability becomes an elite target for attackers aiming for high-value network infiltration.

The vulnerability in ThinkPHP lies in its multi-language functionality feature, particularly with the 'lang' parameter which is not filtered properly. An example of an exploit point would be an endpoint that does not sanitize inputs correctly, allowing attackers to pass through file paths leading to PHP code execution. If these paths are linked to critical system files, the vulnerability can be leveraged to initiate shell command injections. Attackers could use crafted URLs or requests that manipulate the ‘think-lang’ parameter, attempting to execute malicious payloads. The vulnerability is exploited using HTTP GET requests that target specific language paths, presenting significant risks if inadequately secured.

Exploiting this vulnerability can lead to dire consequences such as unauthorized server access and system manipulation. It potentially allows an attacker to deploy malware, exfiltrate data, or take over the application entirely, causing widespread disruption. Successful exploitation might also result in a compromised network, giving attackers a foothold into further infiltrating internal systems. The potential loss of critical business data or the breach of customer information can seriously impact the reputation of an organization. Therefore, addressing this kind of vulnerability is crucial for maintaining the security and trustworthiness of web applications.

REFERENCES

• https://cn-sec.com/archives/1465289.html
• https://blog.csdn.net/qq_60614981/article/details/128724640
• https://www.cnvd.org.cn/flaw/show/CNVD-2022-86535