CVE-2019-5129 Scanner

YouPHPTube Encoder is a plugin used within the YouPHPTube platform to provide necessary video encoding functionalities. It's widely employed by media services that use YouPHPTube as part of their video streaming infrastructure. The encoder processes various video formats, making it integral for completing video-sharing workflows. Technologists and administrators utilize this tool to ensure efficient content transformation and delivery. Due to its pivotal role, any vulnerabilities in the encoder can significantly affect video service quality. Reliable encoding enhances user experience, highlighting the importance of maintaining secure and updated installations.

Command Injection vulnerabilities allow attackers to execute arbitrary commands on the host operating system. The identified flaw in YouPHPTube Encoder version 2.3 involves unauthenticated command injection via the parameter 'base64Url' in the '/objects/getImageMP4.php' endpoint. This flaw could be exploited remotely, presenting a high risk due to its network accessibility and lack of authorization requirements. Unchecked inputs are concatenated improperly within system commands which leads to unintended operation executions. It is critical for administrators to assess and mitigate this vulnerability promptly, given its potential for severe impact.

The vulnerability exists due to improper validation of the 'base64Url' parameter in the '/objects/getImageMP4.php' endpoint. Attackers can manipulate the encoding function to inject commands by crafting malicious payloads. This involves embedding command strings within the base64-encoded inputs processed by the application. The injected commands can persist and be triggered whenever the encoder processes a specially formatted request, leading to unauthorized command execution on the server. Detailed understanding of the vulnerable parameter is essential for implementing adequate protective measures and restraining unauthorized system control.

Exploitation of this vulnerability may lead to significant consequences, including unauthorized data access, system compromise, and disruption of video services. Malicious actors can execute critical system operations, potentially extracting sensitive information, altering encoder states, or deploying escalated access attacks. The flaw also increases risk exposure by providing attackers a vector to embed backdoors or launch further attacks from the compromised environment. Prompt remediation is paramount to prevent these potential outcomes, ensuring the integrity of YouPHPTube systems and the safety of data processed therein.

REFERENCES

• https://xz.aliyun.com/news/6312