Buffer Overflow in Apache NimBLE BASS Service

Executive Summary

This is an Out-of-bounds Write and Integer Underflow vulnerability in Apache NimBLE's BASS service. It occurs due to improper validation when parsing 'Add Source' and 'Modify Source' operation PDUs, potentially leading to stack buffer overflow or arbitrary out-of-bound read. The issue requires Bluetooth pairing to exploit, which may or may not need user action depending on device settings.

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Detection Guidance

Detection requires checking the Apache NimBLE version in use. If the version is below 1.10.0, the system is vulnerable. No specific commands are provided in the context for detection beyond version verification.

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Impact Analysis

An attacker within Bluetooth range could exploit this to execute arbitrary code, crash the device, or leak sensitive information by sending malformed BASS service PDUs. Successful exploitation requires prior pairing, adding a layer of access control.

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Compliance Impact

The vulnerability involves improper validation in Bluetooth BASS service operations, which could lead to stack buffer overflow or arbitrary out-of-bound read. This may allow unauthorized access or data exposure if exploited, potentially impacting compliance with standards like GDPR (data protection) or HIPAA (health data privacy) by enabling unauthorized data access or breaches.

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Mitigation Strategies

Upgrade Apache NimBLE to version 1.10.0 or later to fix the vulnerability. Ensure Bluetooth pairing settings are configured to require user action if applicable to prevent unauthorized access.

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