CVE-2006-6898 in Bluetooth
Summary
by MITRE
Widcomm Bluetooth for Windows (BTW) before 4.0.1.1500 allows remote attackers to listen to and record conversations, aka the CarWhisperer attack.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 06/07/2019
The Widcomm Bluetooth for Windows software suite represents a critical vulnerability in wireless communication security that was exposed through CVE-2006-6898. This vulnerability specifically affects versions prior to 4.0.1.1500 and enables remote attackers to intercept and record audio conversations conducted over Bluetooth connections. The flaw stems from insufficient cryptographic protection mechanisms within the Bluetooth stack implementation, creating a significant security gap that compromises the confidentiality of wireless communications. The vulnerability is particularly concerning because it operates at the transport layer of Bluetooth communication protocols, where audio data is transmitted between devices without adequate encryption or authentication measures.
The technical implementation of this vulnerability involves a fundamental flaw in how Bluetooth audio streams are handled within the Widcomm stack. Attackers can exploit this weakness by positioning themselves within range of targeted Bluetooth devices and leveraging the lack of proper encryption to capture audio data being transmitted. This represents a classic case of weak cryptographic implementation where the system fails to enforce mandatory encryption for sensitive data streams. The vulnerability aligns with CWE-310, which addresses cryptographic weaknesses and insufficient encryption strength in communication protocols. The flaw operates at the application layer of the Bluetooth protocol stack, specifically affecting the audio profile implementations where voice data is processed and transmitted.
The operational impact of this vulnerability extends far beyond simple privacy concerns, as it enables sophisticated surveillance operations that can capture sensitive conversations in real-time. The CarWhisperer attack name derives from the ability to eavesdrop on conversations occurring in vehicles, where Bluetooth headsets and hands-free systems are commonly used. This attack vector demonstrates the broader implications of inadequate wireless security measures, as it allows unauthorized parties to access private communications without requiring physical proximity to the target device. The vulnerability affects not only automotive environments but also any setting where Bluetooth audio devices are utilized for communication purposes.
Security professionals should recognize this vulnerability as a significant indicator of poor security implementation practices in wireless communication protocols. The flaw demonstrates the critical importance of mandatory encryption enforcement in all data transmission channels, particularly those handling sensitive information. Organizations implementing Bluetooth-based communication systems must understand that the absence of proper cryptographic protection creates exploitable entry points for malicious actors. This vulnerability also highlights the need for comprehensive security testing of wireless protocols, as the flaw existed in widely deployed software without adequate detection mechanisms. The attack scenario represents a clear violation of the principle of least privilege and demonstrates how insufficient security controls can compromise entire communication ecosystems. Mitigation strategies should include immediate software updates to the patched versions, implementation of additional network monitoring, and awareness training for users regarding the risks of unsecured Bluetooth connections.