CVE-2020-7511 in Easergy T300
Summary
by MITRE
A CWE-327: Use of a Broken or Risky Cryptographic Algorithm vulnerability exists in Easergy T300 (Firmware version 1.5.2 and older) which could allow an attacker to acquire a password by brute force.
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Analysis
by VulDB Data Team • 06/17/2020
The vulnerability identified as CVE-2020-7511 represents a critical cryptographic weakness in Easergy T300 firmware versions 1.5.2 and earlier, classified under CWE-327 which specifically addresses the use of broken or risky cryptographic algorithms. This device, designed for industrial automation and energy management systems, employs a flawed encryption mechanism that fundamentally compromises its security posture. The weakness stems from the implementation of outdated cryptographic primitives that fail to meet modern security standards, creating an exploitable condition that directly impacts the device's authentication and access control mechanisms.
The technical flaw manifests in the device's password protection scheme where it utilizes weak cryptographic algorithms that are susceptible to brute force attacks. This vulnerability allows an attacker to systematically attempt password guesses against the device's authentication system, leveraging the cryptographic weakness to significantly reduce the time and computational resources required to discover valid credentials. The implementation likely employs deprecated encryption methods such as weak hashing algorithms or insecure symmetric encryption that can be reversed or cracked through well-known attack vectors, making the device particularly vulnerable in environments where physical or network access is possible.
The operational impact of this vulnerability extends beyond simple credential compromise, as it enables unauthorized access to industrial control systems that manage critical infrastructure. Attackers can exploit this weakness to gain administrative privileges, potentially leading to system manipulation, data exfiltration, or disruption of energy management operations. The vulnerability affects devices deployed in industrial environments where security is paramount, creating potential risks for power grid management, facility automation, and other critical systems that rely on the integrity of these devices. The exposure creates a persistent threat vector that can be exploited repeatedly without detection, particularly in scenarios where devices remain unpatched or where network segmentation is inadequate.
Organizations should implement immediate mitigations including firmware updates to versions that address the cryptographic weakness, along with network segmentation to limit access to affected devices. Additional protective measures should include disabling unnecessary network services, implementing strong access controls, and conducting regular security assessments of industrial control systems. The vulnerability highlights the importance of maintaining up-to-date cryptographic implementations and demonstrates the critical need for robust security practices in industrial environments where the consequences of compromise can extend far beyond traditional information technology risks. Compliance with industry standards such as NIST SP 800-53 and IEC 62443 is essential to prevent similar vulnerabilities from compromising critical infrastructure systems.