CVE-2017-20039 in Access Controller
Summary
by MITRE • 06/11/2022
A vulnerability was found in SICUNET Access Controller 0.32-05z. It has been classified as very critical. This affects an unknown part. The manipulation leads to weak authentication. It is possible to initiate the attack remotely.
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Analysis
by VulDB Data Team • 11/22/2022
The vulnerability identified as CVE-2017-20039 represents a critical security flaw in the SICUNET Access Controller version 0.32-05z, classified with a severity rating that underscores its potential for significant system compromise. This vulnerability falls under the broader category of authentication weaknesses that can fundamentally undermine the security posture of network access control systems. The affected component within the SICUNET Access Controller remains unspecified in the public description, which creates uncertainty for security professionals attempting to assess risk exposure across different deployments. The classification as "very critical" indicates that this vulnerability could enable attackers to gain unauthorized access to protected network resources, potentially leading to complete system compromise or data breaches.
The technical nature of this vulnerability centers on weak authentication mechanisms that fail to properly validate user credentials or access requests. This weakness allows attackers to bypass normal authentication procedures and gain access to the system without proper authorization. The fact that the attack can be initiated remotely means that threat actors do not require physical access to the device or network infrastructure to exploit this vulnerability. This remote exploit capability significantly increases the attack surface and makes the vulnerability particularly dangerous for organizations that rely on network-based access control systems. The weakness likely stems from insufficient cryptographic practices, predictable authentication tokens, or flawed session management that allows attackers to impersonate legitimate users or gain administrative privileges.
From an operational perspective, the impact of this vulnerability extends beyond simple unauthorized access to potentially enable more sophisticated attacks within the compromised network environment. An attacker who successfully exploits this weakness could potentially escalate privileges, access sensitive data, modify system configurations, or establish persistent access points within the network. The remote nature of the attack means that organizations may not immediately detect compromise, as the exploitation could occur without generating obvious network traffic patterns or system alerts. This vulnerability particularly affects organizations that depend on SICUNET Access Controller for managing network access controls, potentially exposing critical infrastructure to unauthorized access. The lack of specific information about the affected component makes it challenging for security teams to determine whether their systems are vulnerable, potentially leading to delayed response times and increased risk exposure.
Security mitigations for this vulnerability should focus on immediate remediation through official vendor patches or firmware updates that address the underlying authentication weakness. Organizations should implement network segmentation to limit the potential impact of a successful exploitation attempt and deploy intrusion detection systems to monitor for suspicious authentication attempts. The vulnerability demonstrates the importance of regular security assessments and vulnerability management programs that can identify and remediate authentication-related weaknesses before they can be exploited. Security teams should also consider implementing additional authentication layers such as multi-factor authentication to provide defense-in-depth protection against credential-based attacks. According to CWE standards, this vulnerability would likely be categorized under CWE-287 which addresses improper authentication issues, and from an ATT&CK perspective, it maps to techniques involving credential access and privilege escalation. Organizations should also conduct comprehensive network audits to identify all instances of the affected SICUNET Access Controller versions and ensure that all systems are updated to patched versions that address the weak authentication mechanisms. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date security controls and the potential consequences of relying on systems with known authentication weaknesses.