Buffer Overflow in BUFFALO Wi-Fi Products Causes DoS

Executive Summary

This is a stack-based buffer overflow vulnerability in BUFFALO Wi-Fi products. It allows a non-authenticated attacker to send a specially crafted HTTP request that triggers a denial-of-service (DoS) condition by overwriting stack memory.

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Detection Guidance

This vulnerability can be detected by checking the firmware versions of affected Buffalo Wi-Fi products. For WSR-300HP, verify if the firmware is prior to 2.55. For WEX-G300, check if the firmware is prior to 1.71. If automatic updates are enabled, confirm the fixes are applied.

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Impact Analysis

An attacker could exploit this to crash affected Wi-Fi devices, causing network disruptions or rendering services unavailable. Since no authentication is required, any device connected to the network could be targeted.

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Compliance Impact

This vulnerability could impact compliance with standards like GDPR and HIPAA by enabling unauthorized access or disruption of services. A stack-based buffer overflow may lead to denial-of-service conditions, potentially compromising data availability. Unauthenticated remote exploitation could violate confidentiality and integrity requirements under these regulations.

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Mitigation Strategies

Apply the latest firmware updates from BUFFALO for affected Wi-Fi products to patch the stack-based buffer overflow vulnerability. Isolate vulnerable devices from critical network segments until patched. Monitor network traffic for unusual HTTP requests targeting Wi-Fi devices.

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