CVE-2018-17932 in JUUKO K-800
Summary
by MITRE • 11/03/2020
JUUKO K-800 (Firmware versions prior to numbers ending ...9A, ...9B, ...9C, etc.) is vulnerable to a replay attack and command forgery, which could allow attackers to replay commands, control the device, view commands, or cause the device to stop running.
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Analysis
by VulDB Data Team • 12/01/2020
The JUUKO K-800 device represents a significant security vulnerability through its susceptibility to replay attacks and command forgery mechanisms that fundamentally compromise the integrity and confidentiality of its communication protocols. This vulnerability affects firmware versions prior to specific build numbers ending in 9A, 9B, 9C, and similar patterns, indicating a targeted security flaw that was addressed through subsequent firmware updates. The device operates within a communication framework where commands are transmitted between control interfaces and the embedded system, creating a potential attack surface that adversaries can exploit to manipulate device behavior through malicious replay of previously captured command sequences.
The technical flaw manifests in the device's failure to implement proper authentication mechanisms or sequence verification for incoming commands, allowing attackers to intercept legitimate command transmissions and replay them at a later time to achieve unauthorized device control. This vulnerability specifically targets the command processing pipeline where the device lacks cryptographic integrity checks or timestamp validation that would normally prevent the reuse of previously transmitted commands. The absence of such mechanisms creates a condition where command forgery becomes trivial, enabling attackers to execute arbitrary commands that would normally require legitimate authorization, thereby undermining the device's security model and operational integrity.
The operational impact of this vulnerability extends beyond simple unauthorized access to encompass complete device compromise and potential denial of service conditions. Attackers can leverage this weakness to gain persistent control over the device, potentially accessing sensitive operational data, modifying device configurations, or causing operational disruptions through command injection that leads to device malfunctions or complete system failures. The vulnerability's scope allows for both passive monitoring of command flows and active manipulation of device operations, creating a comprehensive attack vector that can be exploited for various malicious purposes including surveillance, data exfiltration, or disruption of service availability.
This vulnerability aligns with CWE-319 (Cleartext Transmission of Sensitive Information) and CWE-306 (Missing Authentication) categories, reflecting the fundamental security failures in how the device handles command authentication and transmission integrity. The attack patterns associated with this flaw correspond to ATT&CK techniques including T1072 (Software Deployment Tools) and T1566 (Phishing) for initial access, followed by T1059 (Command and Scripting Interpreter) and T1555 (Credentials from Password Stores) for maintaining persistence and escalating privileges. Organizations deploying JUUKO K-800 devices should implement immediate firmware updates to address the vulnerability, alongside network segmentation and monitoring of command traffic to detect potential replay attacks. Additional mitigations include implementing secure communication protocols with proper authentication, enabling timestamp validation on commands, and establishing regular security assessments to identify similar vulnerabilities in embedded systems and IoT devices.