Session Cookie Exposure Leading to Authentication Bypass in Kaon AR2140X Router

Executive Summary

The Kaon AR2140X router issues session cookies in responses to unauthenticated HTTP requests. This allows a remote attacker to obtain a valid session identifier without credentials, bypassing authentication. The attacker can then perform unauthorized actions on upgrade-related features and force the router to make GET requests to arbitrary domains.

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Detection Guidance

Detecting this vulnerability requires checking for unauthenticated session cookies in HTTP responses from the Kaon AR2140X router. Use network monitoring tools like Wireshark or tcpdump to capture HTTP traffic and inspect responses for session cookies issued without authentication. Check router logs for unusual GET requests to external domains.

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Impact Analysis

An attacker could gain unauthorized access to the router's upgrade functions, potentially altering its configuration or firmware. This could lead to network compromise, data interception, or further attacks on connected devices.

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Compliance Impact

This vulnerability could lead to unauthorized access to network devices, potentially violating data protection requirements under GDPR or HIPAA. It may result in unauthorized data access or network breaches, requiring incident reporting and compliance investigations.

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Mitigation Strategies

Immediately update the router firmware to the latest version if available. If no update exists, isolate the router from untrusted networks, restrict access to trusted IPs, and monitor for unauthorized GET requests. Disable unnecessary services and implement strong firewall rules to limit exposure.

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