Stack-Based Out-of-Bounds Write in TP-Link TL-MR6400 Admin Interface

Executive Summary

This is a stack-based out-of-bounds write vulnerability in TP-Link TL-MR6400 v7 routers. It occurs in the login request handling of the administrative web interface. An unauthenticated attacker on the same network can exploit it by sending a specially crafted HTTP request.

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Detection Guidance

This vulnerability can be detected by monitoring for malformed HTTP requests targeting the administrative web interface of TP-Link TL-MR6400 v7 routers. Check router logs for unusual HTTP request patterns or crashes in the web service process.

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Impact Analysis

Exploitation may crash the web service process, causing a denial-of-service. This results in temporary loss of access to the router's web management interface until the service restarts.

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Compliance Impact

This vulnerability causes a denial-of-service condition by crashing the router's web management interface, leading to temporary loss of access. This could disrupt logging, monitoring, or administrative controls required for compliance with standards like GDPR or HIPAA, which mandate availability and integrity of systems handling sensitive data.

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Mitigation Strategies

Immediately update the router firmware to the latest version provided by TP-Link. If no update is available, restrict access to the administrative web interface from untrusted networks and disable remote management features.

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