CVE-2020-1802 in OSCA-550
Summary
by MITRE
There is an insufficient integrity validation vulnerability in several products. The device does not sufficiently validate the integrity of certain file in certain loading processes, successful exploit could allow the attacker to load a crafted file to the device through USB.Affected product versions include:OSCA-550 versions 1.0.1.23(SP2);OSCA-550A versions 1.0.1.23(SP2);OSCA-550AX versions 1.0.1.23(SP2);OSCA-550X versions 1.0.1.23(SP2).
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Analysis
by VulDB Data Team • 05/18/2024
This vulnerability represents a critical integrity validation flaw that affects multiple versions of OSCA series devices, specifically those running firmware version 1.0.1.23(SP2). The weakness lies in the device's failure to properly verify the integrity of files during the loading process, creating a potential attack vector that could be exploited through USB connections. The vulnerability stems from inadequate cryptographic validation mechanisms that should ensure file authenticity before execution, leaving the system susceptible to malicious file injection attacks.
The technical implementation of this flaw allows an attacker with physical access to the device to manipulate the loading process by introducing crafted files through USB interfaces. This represents a failure in the device's security architecture where input validation occurs too late in the process or not at all, enabling arbitrary code execution. The vulnerability specifically impacts the device's boot or update processes where file integrity checks should be rigorously enforced, creating a pathway for attackers to bypass normal security controls.
From an operational perspective, this vulnerability significantly increases the attack surface for physical access attacks and could lead to complete device compromise. An attacker with USB access could potentially install malicious firmware or software that would persist across device reboots, allowing for long-term persistence and data exfiltration. The impact extends beyond simple privilege escalation to include full system compromise and potential network infiltration through the compromised device.
The vulnerability maps to CWE-347, which specifically addresses improper certificate validation and insufficient integrity checks in security protocols. This weakness aligns with ATT&CK technique T1059.007 for command and scripting interpreter, as successful exploitation could enable attackers to execute malicious code through the compromised device. Organizations should implement immediate mitigations including disabling unnecessary USB ports, enforcing strict firmware update procedures, and implementing additional integrity checking mechanisms beyond the existing system validation.
Security controls should focus on strengthening the device's integrity verification processes and ensuring that all file loading operations include robust cryptographic validation. The recommended approach involves implementing proper digital signatures verification, checksum validation, and secure boot processes that prevent unauthorized code execution. Additionally, network segmentation and monitoring should be enhanced to detect potential exploitation attempts, while firmware update procedures should include mandatory integrity checks before deployment to prevent malicious code from being loaded through legitimate update channels.