Executive Summary

[{'type': 'paragraph', 'content': 'CVE-2018-25193 is a denial of service vulnerability in Mongoose Web Server version 6.9 and earlier. It allows remote attackers to crash the server by repeatedly establishing multiple socket connections to the default port and sending malformed data.'}, {'type': 'paragraph', 'content': "This behavior exhausts the server's resources, causing the service to become unavailable."}, {'type': 'paragraph', 'content': 'The vulnerability requires no privileges, user interaction, or authentication, and can be exploited remotely over the network.'}] [1]

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Impact Analysis

The vulnerability can cause a denial of service condition by exhausting server resources.

This results in the Mongoose Web Server crashing and becoming unavailable, which can disrupt services relying on it.

Since the attack can be performed remotely without authentication, it poses a significant risk to availability.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by monitoring for an unusually high number of socket connections to the Mongoose Web Server\'s default port (usually port 8080). Repeated connection attempts sending malformed data such as the payload "BOOM" can indicate an ongoing attack.'}, {'type': 'paragraph', 'content': "A practical detection method is to use network monitoring tools or commands to observe multiple simultaneous connections to the server's port 8080."}, {'type': 'list_item', 'content': "Use netstat to check for many connections on port 8080: netstat -an | grep ':8080' | grep ESTABLISHED"}, {'type': 'list_item', 'content': 'Use tcpdump or Wireshark to capture and analyze traffic on port 8080 for repeated malformed payloads.'}, {'type': 'list_item', 'content': 'On Linux, use: sudo lsof -i :8080 to list open connections to the port.'}] [2]

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Mitigation Strategies

[{'type': 'paragraph', 'content': "Immediate mitigation steps include limiting the number of simultaneous connections to the Mongoose Web Server's default port to prevent resource exhaustion."}, {'type': 'paragraph', 'content': 'Implement firewall rules or rate limiting to block or throttle repeated connection attempts from the same IP address.'}, {'type': 'paragraph', 'content': 'If possible, update the Mongoose Web Server to a version later than 6.9 where this vulnerability is fixed.'}, {'type': 'paragraph', 'content': 'Monitor server logs and network traffic for signs of attack and respond by blocking offending IPs.'}] [1, 2]

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