CVE-2021-35064 Scanner

Kramer VIAware is widely used in educational institutions, corporations, and other organizations for wireless collaboration and presentation. The software is designed to enable users to connect their devices to displays without the need for traditional cables, enhancing flexibility in meetings and classrooms. VIAware provides a comprehensive solution for sharing content securely over a network. It is employed to facilitate interactive presentations, supporting multiple devices and operating systems. Organizations use this product to streamline meetings and provide seamless access to digital content across various device platforms. The software's flexibility and wide range of functionalities make it a popular choice for technology-driven environments.

Remote Code Execution vulnerabilities allow an attacker to execute arbitrary code on a targeted system. In the case of Kramer VIAware, misconfigured sudo permissions and vulnerabilities in handling privileged operations expose the system to unauthorized code execution. This vulnerability occurs when the system executes untrusted code through ajaxPages/writeBrowseFilePathAjax.php. Unauthorized access can lead to significant control over the affected system, posing severe security risks. Attackers exploit these vulnerabilities to run malicious scripts or executables remotely if the web interface is accessible. As a result, sensitive data could be exposed or altered, and the overall system integrity compromised.

The vulnerability in Kramer VIAware arises from improper sudoers configurations, enabling attackers to execute arbitrary commands with elevated privileges. Key endpoints like ajaxPages/writeBrowseFilePathAjax.php are involved, handling operations without sufficient security checks. Attackers can craft HTTP requests embedding malicious parameters, such as 'radioBtnVal', to inject code and exploit the system. The vulnerable configuration allows remote users to drop files containing executable scripts in the server path '/var/www/html/' for future execution. Without adequate server-side validation, attackers can bypass restrictions and gain control over the system's execution flow. Exploiting this vulnerability requires access to the web interface, making network security crucial in preventing unauthorized access.

Exploiting this Remote Code Execution vulnerability can have severe impacts on affected systems. Successfully executed attacks could result in unauthorized access to sensitive data, data corruption, or exfiltration. Attackers might gain administrative privileges, potentially leading to system-wide disruptions or compromise of other networked devices. Organizations may face significant operational downtime, financial loss, and reputational damage. There is a heightened risk of additional malicious activities, such as deploying backdoors or launching further attacks from the compromised system. Overall, the exploitation of this vulnerability compromises system confidentiality, integrity, and availability, posing substantial cybersecurity threats.

REFERENCES

• http://packetstormsecurity.com/files/166623/Kramer-VIAware-Remote-Code-Execution.html
• https://www.kramerav.com/us/product/viaware
• https://www.exploit-db.com/exploits/50856
• https://write-up.github.io/kramerav/
• https://nvd.nist.gov/vuln/detail/CVE-2021-35064