SolarWinds Kiwi Syslog Server Vulnerability in 9.6.7.1

Introduction

The SolarWinds Kiwi Syslog Server version 9.6.7.1 has been identified as having a significant vulnerability. This flaw might allow unauthorized users to execute malicious payloads or access sensitive data without proper authentication. Understanding this vulnerability is essential for organizations utilizing this software to manage their syslog messages effectively.

Understanding the Vulnerability

This vulnerability can be exploited through a particular entry point. Attackers can manipulate specific parameters in HTTP requests to potentially gain unauthorized access. The vulnerability encompasses issues associated with handling user input, specifically in the context of remote command execution.

Entry Points

The key entry points for this vulnerability typically rely on the following parameters:

• URI Parameters: Parameters that are sent within the URI can often be manipulated to carry out the attack.
• HTTP Methods: The vulnerability is accessible through standard HTTP methods such as GET and POST. These methods can send crafted payloads to the server.

This vulnerability can be categorized as non-authenticated, allowing attackers to exploit it without needing valid user credentials.

Payload Explanation

Though specific payloads used in exploiting this vulnerability may not always be publicly available or stable, understanding the method used is vital. In this vulnerability, attackers can potentially insert malicious commands or scripts into parameters that are not adequately sanitized.

For instance, an attacker could craft an HTTP request targeting the server’s API, using the GET method to send a payload. A hypothetical payload might look like this:

Payload: curl -X GET http://vulnerable-server/api/execute?command=some_malicious_command

In this example, the parameter command is susceptible to injection. The server may execute any command provided if it does not validate or sanitize the input properly.

Flow of Execution

To visualize how an attack might occur, consider the following ASCII flow diagram:

  [Client] 
     |
     |--(1) Crafted HTTP Request: GET /api/execute?command=some_malicious_command
     |
  [Vulnerable Server]
     |
     |--(2) Processes request without validation
     |
     |--(3) Executes command
     |
  [Compromised System]

In this flow, the client sends a malicious request, the server processes it without proper validation, and the malicious command is executed. This illustrates how misuse of input can lead to severe security breaches.

Mitigation of the Vulnerability

Addressing this vulnerability urgently is necessary to prevent unauthorized access and potential data compromise. Several remediation strategies can be implemented:

• Input Validation: Always validate and sanitize user input. Implement strict whitelisting to ensure only expected values are processed.
• Least Privilege Principle: Limit permissions on the server. Ensure that the server’s functional components only have the access needed to perform their tasks.
• Regular Updates: Keep the Kiwi Syslog Server updated with the latest patches released by SolarWinds. Regularly check for updates to fix any newly discovered vulnerabilities.

Final Thoughts

Organizations using SolarWinds Kiwi Syslog Server version 9.6.7.1 must act quickly to mitigate any vulnerabilities present. By understanding the details of the vulnerability and implementing the recommended mitigation strategies, enterprises can significantly reduce the risk of exploitation.

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Reference: Exploit-DB (CVE-2020-7213) – https://www.exploit-db.com/exploits/52064