CVE-2014-9408 in B4 Staff Badge Tag
Summary
by MITRE
Ekahau B4 staff badge tag 5.7 with firmware 1.4.52, Real-Time Location System (RTLS) Controller 6.0.5-FINAL, and Activator 3 uses part of the MAC address as part of the RC4 setup key, which makes it easier for remote attackers to guess the key via a brute-force attack.
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Analysis
by VulDB Data Team • 04/09/2022
The vulnerability described in CVE-2014-9408 affects Ekahau's Real-Time Location System (RTLS) infrastructure components including the B4 staff badge tag version 5.7 with firmware 1.4.52, RTLS Controller 6.0.5-FINAL, and Activator 3 software. This weakness resides in the cryptographic implementation used for securing communication within the RTLS environment, specifically in how the RC4 stream cipher key is constructed. The flaw represents a significant security concern as it directly impacts the confidentiality and integrity of location data transmitted by the system.
The technical flaw stems from the improper derivation of the RC4 setup key where a portion of the device's MAC address is used as part of the key generation process. This design decision fundamentally weakens the cryptographic security because MAC addresses are typically publicly visible identifiers that can be easily obtained through network discovery or physical inspection. When a substantial portion of the key is derived from predictable elements like MAC addresses, the effective key space is dramatically reduced, making brute-force attacks significantly more feasible for remote attackers who can observe network traffic or gain access to the system. This weakness aligns with CWE-326, which addresses inadequate encryption strength, and specifically relates to improper key derivation practices that compromise cryptographic security.
The operational impact of this vulnerability extends beyond simple cryptographic weakness to encompass potential unauthorized access to sensitive location data within enterprise environments. Remote attackers who can observe the network traffic or gain proximity to the RTLS infrastructure can leverage the predictable key components to perform brute-force attacks against the RC4 cipher. This compromises the confidentiality of location tracking information, potentially exposing employee movements, asset locations, and security zone access patterns. The vulnerability particularly affects organizations relying on RTLS for security monitoring, asset tracking, or location-based services, as it undermines the fundamental security assumptions of the system. Attackers could potentially gain unauthorized access to real-time location data, leading to privacy violations, security breaches, and potential operational disruptions. The impact is further exacerbated by the fact that RTLS systems are often deployed in sensitive environments such as hospitals, corporate offices, and industrial facilities where location data is critical for both operational and security purposes.
Mitigation strategies for this vulnerability require immediate attention to the cryptographic implementation within the Ekahau RTLS ecosystem. Organizations should prioritize updating to the latest firmware versions that address the key derivation weakness, ensuring that all components in the RTLS infrastructure are running patched versions. The recommended approach involves implementing proper key derivation mechanisms that do not rely on predictable identifiers such as MAC addresses, instead utilizing cryptographically secure random number generators to create full-strength keys. Network segmentation and monitoring should be enhanced to detect anomalous traffic patterns that might indicate brute-force attempts against the cryptographic system. Additionally, organizations should consider implementing alternative authentication mechanisms and encryption protocols that provide stronger security guarantees than the vulnerable RC4 implementation. The mitigation efforts should align with industry best practices for cryptographic security and may require coordination with Ekahau to obtain proper firmware updates and security patches. Security teams should also implement continuous monitoring of the RTLS environment to detect potential exploitation attempts and maintain detailed audit logs of system access and data flows. This vulnerability serves as a reminder of the critical importance of proper key management and cryptographic implementation in security-critical systems, particularly those handling sensitive location data in enterprise environments.