CVE-2022-36560 in SkyBridge MB-A200
Summary
by MITRE • 08/30/2022
Seiko SkyBridge MB-A200 v01.00.04 and below was discovered to contain multiple hard-coded passcodes for root. Attackers are able to access the passcodes at /etc/srapi/config/system.conf and /usr/sbin/ssol-sshd.sh.
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Analysis
by VulDB Data Team • 10/09/2022
The vulnerability identified as CVE-2022-36560 affects Seiko SkyBridge MB-A200 devices running firmware versions v01.00.04 and earlier, representing a critical security flaw that exposes hard-coded root credentials within the device configuration. This issue stems from poor security practices in the embedded system design where administrative passcodes are permanently embedded within the device software rather than being dynamically generated or securely stored. The affected configuration files at /etc/srapi/config/system.conf and /usr/sbin/ssol-sshd.sh contain plaintext credentials that provide unauthorized users with direct root access to the device's command-line interface and system functions.
The technical implementation of this vulnerability aligns with CWE-798, which addresses the use of hard-coded credentials in software applications. Attackers can exploit this flaw by simply accessing the specified file paths to extract the root passcodes, eliminating the need for complex exploitation techniques or social engineering. The presence of these hard-coded credentials in publicly accessible system files represents a fundamental failure in secure configuration management and violates industry best practices for credential handling. The vulnerability affects the device's authentication mechanism at the operating system level, providing attackers with complete administrative control over the device's functionality and potentially enabling further network infiltration.
The operational impact of this vulnerability extends beyond immediate device compromise, as it allows attackers to establish persistent access points within network infrastructure. Once root access is obtained, adversaries can modify system configurations, install malicious software, monitor network traffic, and potentially use the device as a pivot point for attacking other systems within the same network segment. This vulnerability particularly affects industrial control systems and embedded devices where physical security may be limited, making it especially dangerous in environments where these devices are deployed without adequate network segmentation or monitoring. The impact is further amplified by the fact that these credentials are likely shared across multiple devices in the same product line, potentially enabling widespread compromise.
Mitigation strategies for CVE-2022-36560 should focus on immediate firmware updates from Seiko to address the hard-coded credential issue and implement proper credential management practices. Organizations should conduct comprehensive inventory assessments to identify all affected devices and ensure proper network segmentation to limit the blast radius of potential compromises. The remediation process must include replacing the hard-coded credentials with dynamically generated values and implementing secure configuration management practices. Additionally, network monitoring should be enhanced to detect unauthorized access attempts and unusual command execution patterns that may indicate exploitation of this vulnerability. This issue demonstrates the importance of following security guidelines such as those outlined in the NIST SP 800-53 security controls and aligns with ATT&CK technique T1078 for valid accounts and privilege escalation, emphasizing the need for proper access control and credential management in embedded systems.