CVE-2023-23906 in SkyBridge MB-A100
Summary
by MITRE • 05/10/2023
Missing authentication for critical function exists in SkyBridge MB-A100/110 firmware Ver. 4.2.0 and earlier, which may allow a remote unauthenticated attacker to execute some critical functions without authentication, e.g., rebooting the product.
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Analysis
by VulDB Data Team • 10/14/2025
The vulnerability identified as CVE-2023-23906 represents a critical authentication flaw within the SkyBridge MB-A100/110 network infrastructure devices. This weakness exists in firmware versions 4.2.0 and earlier, creating a significant security risk for organizations relying on these networking appliances. The device in question is a network bridge system designed for enterprise and industrial applications, making the authentication bypass particularly concerning for critical infrastructure deployments.
The technical implementation of this vulnerability stems from a failure in the firmware's access control mechanisms. Specifically, the device lacks proper authentication checks for critical administrative functions within its web-based management interface. An attacker can exploit this weakness by directly accessing specific API endpoints or management functions without providing valid credentials. The vulnerability allows execution of administrative operations such as system reboot commands, which can result in denial of service conditions and potentially provide attackers with opportunities to escalate privileges or disrupt network operations. This flaw directly maps to CWE-287 which addresses improper authentication issues in software systems.
The operational impact of this vulnerability extends beyond simple denial of service scenarios. Remote unauthenticated attackers can leverage this weakness to perform unauthorized administrative actions that could severely compromise network integrity and availability. A successful exploitation could result in complete system disruption through unauthorized reboots, potentially causing cascading failures in network infrastructure. The vulnerability affects devices that are typically deployed in critical network segments where availability and security are paramount. Organizations may face significant operational disruption if attackers exploit this vulnerability to repeatedly reboot network equipment or gain unauthorized access to network management functions.
Mitigation strategies for CVE-2023-23906 require immediate firmware updates to versions that address the authentication bypass issue. Network administrators should also implement network segmentation to limit access to these management interfaces and deploy network monitoring solutions to detect unauthorized access attempts. The vulnerability aligns with several ATT&CK tactics including T1078 for valid accounts and T1566 for phishing, as attackers may attempt to exploit this weakness to gain persistent access to network infrastructure. Organizations should also consider implementing multi-factor authentication mechanisms for any remaining administrative access points and establish robust network access control policies to minimize the attack surface. Additionally, regular security assessments and vulnerability scanning should be conducted to identify similar authentication flaws in other network infrastructure components.