CVE-2019-5128 Scanner

YouPHPTube Encoder is a plugin used for providing encoder functionality in the YouPHPTube platform. It enables users to encode videos into various formats, making content distribution more accessible and manageable. The software is widely utilized by content creators and platforms seeking efficient processing and sharing of video materials. Its broad adoption underscores the importance of ensuring robust security measures within the application. Being open-source, YouPHPTube allows users to modify and distribute their copies. However, these advantages come with the need for rigorous security oversight.

The Command Injection vulnerability in YouPHPTube Encoder arises due to inadequate input validation of the base64Url parameter in the /objects/getImageMP4.php endpoint. This flaw permits an attacker to inject arbitrary commands that the server executes, leading to severe security consequences. Command Injection vulnerabilities are hazardous as they provide avenues for attackers to run parameters in the host server's operating environment. Successful exploitation could lead to unauthorized file manipulations and further intrusions into the system. Such vulnerabilities highlight the critical need for secure coding practices, especially input sanitization.

Technically, the vulnerability occurs because the base64Url parameter is not properly sanitized before being processed. The lack of controls allows the inclusion of backticks, which are interpreted by the server as a command execution initiation. This vulnerable parameter allows an attacker to construct payloads that can execute operating system commands. In the case of the YouPHPTube Encoder version 2.3, the vulnerable endpoint is /objects/getImageMP4.php, exposing it to potential exploits. The seriousness of the vulnerability is evident due to the critical CVSS score of 9.8.

When exploited by malicious actors, this Command Injection vulnerability could result in full system compromise. Attackers might inject commands to modify, delete, or reveal sensitive files, leading to data breaches and unauthorized access. Furthermore, it provides a vector for further network infiltration, enabling attackers to use the compromised server as a pivot point. The potential for remote access to execute arbitrary commands increases the risk of ransomware deployments, data exfiltrations, and system downtimes. Addressing this vulnerability is crucial to safeguarding server integrity and data confidentiality.

REFERENCES

• https://xz.aliyun.com/news/6312