CVE-2016-2333 in SL-1000 M2M Modular Gateway
Summary
by MITRE
SysLINK SL-1000 Machine-to-Machine (M2M) Modular Gateway devices with firmware before 01A.8 use the same hardcoded encryption key across different customers' installations, which allows attackers to defeat cryptographic protection mechanisms by leveraging knowledge of this key from another installation.
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Analysis
by VulDB Data Team • 10/30/2024
The SysLINK SL-1000 M2M gateway represents a critical infrastructure device designed for machine-to-machine communication in industrial and enterprise environments. These devices serve as network bridges facilitating data transmission between various industrial systems and cloud services, making them prime targets for cyber adversaries seeking to compromise industrial control systems. The vulnerability resides in the firmware implementation where cryptographic security mechanisms were improperly configured with static, hard-coded encryption keys that remain unchanged across all customer deployments. This design flaw fundamentally undermines the security architecture by creating a universal decryption capability that exists across multiple customer installations, effectively eliminating any cryptographic protection for data in transit or at rest.
The technical flaw manifests as a violation of fundamental cryptographic principles where the same symmetric encryption key is distributed and implemented across numerous distinct customer environments. This approach directly contravenes security best practices outlined in the NIST Special Publication 800-57 and CWE-327, which specifically addresses the use of weak or predictable cryptographic keys. The hardcoded nature of the key means that any attacker who can obtain this information from one installation gains immediate access to decrypt communications from other customers, creating a cascading security failure that extends far beyond the initial compromise. This vulnerability operates at the protocol level, affecting the confidentiality and integrity of all encrypted communications passing through the gateway devices, which typically include sensitive operational data, configuration parameters, and control signals.
The operational impact of this vulnerability extends beyond simple data exposure to encompass complete compromise of industrial control systems and potential safety risks. Attackers can exploit this weakness to manipulate control signals, access sensitive operational data, and potentially disrupt critical industrial processes. The vulnerability particularly affects environments where the SL-1000 devices are deployed in manufacturing, energy, or transportation sectors where industrial control systems require robust security guarantees. The attack surface is significantly expanded because the same key compromise can affect multiple customers simultaneously, making this a particularly dangerous vulnerability from an adversary perspective. According to the MITRE ATT&CK framework, this vulnerability maps to techniques involving credential access and defense evasion, as attackers can leverage the compromised keys to maintain persistent access and avoid detection mechanisms.
Organizations utilizing SysLINK SL-1000 devices face substantial risk from this vulnerability, particularly in environments where industrial security is paramount. The remediation approach requires immediate firmware updates from the vendor to implement unique cryptographic keys per installation, though this process may be complicated by the distributed nature of these devices across multiple customer sites. Security teams should implement network monitoring to detect unusual communication patterns that might indicate exploitation attempts, while also considering the broader implications for supply chain security and the need for secure device provisioning processes. The vulnerability highlights the importance of proper key management practices and demonstrates how a single design flaw can compromise the security posture of multiple organizations simultaneously.