Stack-Based Buffer Overflow in TOTOLINK X2000R

Executive Summary

This is a stack-based buffer overflow vulnerability in the TOTOLINK X2000R router firmware. It exists in the formMapDelDevice hostname handling function. An attacker can send a specially crafted HTTP request to trigger a buffer overflow, which may allow arbitrary code execution. The attack requires authentication but can be performed remotely.

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Detection Guidance

Detecting this vulnerability requires checking for vulnerable TOTOLINK X2000R firmware versions. Inspect HTTP traffic for malformed requests targeting the formMapDelDevice hostname functionality. Monitor for crashes or unusual behavior in the web server process.

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Impact Analysis

If exploited, this vulnerability could allow an attacker to execute arbitrary code on the affected router. This could lead to full device compromise, allowing the attacker to take control of the router, intercept network traffic, or use it as a pivot point to attack other devices on the network.

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Compliance Impact

This vulnerability could lead to unauthorized access to network devices, potentially exposing sensitive data. This may violate compliance requirements such as GDPR (data protection) or HIPAA (health information security) if the affected device is used in environments handling regulated data.

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Mitigation Strategies

Immediately update the TOTOLINK X2000R firmware to the latest patched version. If no patch is available, restrict access to the device's web interface via network segmentation or firewall rules. Disable unnecessary services and monitor for suspicious HTTP requests.

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