Description

CVE-2024-56331 is an Improper URL Handling Vulnerability affecting Uptime Kuma, an open-source monitoring tool. This vulnerability allows attackers to access sensitive local files on the server by exploiting the file:/// protocol. The vulnerability is triggered through the "real-browser" request type, which takes a screenshot of the URL provided by the attacker. By supplying local file paths, such as file:///etc/passwd, attackers can read sensitive data from the server.

The SVRS score for this vulnerability is 30, indicating that while the vulnerability is exploitable, its impact might not be as severe as a higher score. However, it is important to remember that the presence of active exploits in the wild indicates a potential for serious consequences.

Key Insights

• Active Exploitation: The vulnerability has been identified as "In The Wild," meaning hackers are actively exploiting it.
• Impact: The vulnerability allows attackers to access sensitive local files, potentially exposing critical information like system configurations, user credentials, and other sensitive data.
• Wide Reach: This vulnerability affects any authenticated user who can submit a URL in the "real-browser" mode, potentially impacting a wide range of users.
• Severity: While the SVRS score is 30, the fact that active exploits are present increases the severity, making immediate action necessary.

Mitigation Strategies

• Upgrade Uptime Kuma: The vulnerability is addressed in version 1.23.16. Immediately upgrade to this version or later to patch the vulnerability.
• Input Validation: Implement robust input validation to prevent users from entering malicious URLs. Sanitize all user inputs, especially those related to URLs, before processing.
• Restrict File Access: Implement restrictions on file access for the "real-browser" functionality. Ensure the system only allows access to authorized directories and files.
• Network Segmentation: Isolate the Uptime Kuma server from other critical systems to limit the potential impact of a compromise.

Additional Information

For more information or assistance in addressing this vulnerability, clients can use the 'Ask to Analyst' feature, contact SOCRadar directly, or open a support ticket.