Overview
CVE-2020-36878 details a critical unauthenticated file disclosure vulnerability affecting ReQuest Serious Play Media Player version 3.0. This flaw allows remote attackers to access sensitive files on the server due to improper validation of input passed through the ‘file’ parameter within a script. By manipulating this parameter, attackers can potentially read arbitrary web log files and other sensitive local resources.
Technical Details
The vulnerability stems from a lack of proper sanitization of the ‘file’ parameter within a specific script of the ReQuest Serious Play Media Player. When a request containing a crafted ‘file’ parameter is sent to the server, the script attempts to read the file specified by the attacker-controlled input. Due to the absence of adequate input validation or path traversal protection, an attacker can use techniques like directory traversal (“../”) to navigate the file system and access files outside the intended scope.
Specifically, the unauthenticated nature of the vulnerability means an attacker does not need valid credentials to exploit it, making it particularly dangerous.
CVSS Analysis
While the provided information states the CVSS score and severity are “N/A”, this type of vulnerability, allowing arbitrary file disclosure, would typically be considered HIGH severity. A typical CVSS score, if assessed, would likely fall within the 7.5-10 range depending on exploitability and impact specifics. A lack of authentication makes it easier to exploit, increasing the risk. It is unusual for such a vulnerability to not have a CVSS score assigned.
Possible Impact
The consequences of exploiting CVE-2020-36878 can be severe, including:
- Exposure of Sensitive Data: Attackers can access configuration files containing database credentials, API keys, and other sensitive information.
- Information Leakage: Disclosure of web log files can reveal user activity, internal system details, and potential weaknesses.
- Privilege Escalation (Potential): In some cases, disclosed information could be used to further compromise the system and gain elevated privileges.
- Compliance Violations: The exposure of sensitive data could lead to breaches of data privacy regulations.
Mitigation or Patch Steps
Unfortunately, without information about a specific patch or update from ReQuest, the mitigation options are limited. However, consider the following steps to minimize the risk:
- Discontinue Use: The most effective mitigation is to discontinue using the affected ReQuest Serious Play Media Player 3.0 if it is no longer supported and cannot be secured.
- Web Application Firewall (WAF) Rules: Implement WAF rules to detect and block suspicious requests containing directory traversal sequences in the ‘file’ parameter. Specifically look for patterns like “../” or “..\” in the request.
- Input Validation (If Possible): If you have access to the application code (unlikely), rigorously validate and sanitize any input received through the ‘file’ parameter. Ensure that it conforms to an expected format and does not contain directory traversal characters.
- Principle of Least Privilege: Ensure that the web server user account has only the necessary permissions to access required files. Limit its access to sensitive resources.
- Monitor Logs: Regularly monitor web server logs for suspicious activity, such as unusual file access attempts or requests containing directory traversal sequences.
Important: Contact ReQuest support for official patches or upgrades. As the software is vulnerable, it is highly recommended that a supported and secure alternative media player is used.
