CVE-2021-39279 is a high-severity vulnerability that affects various MOXA devices, specifically allowing authenticated command injection via the endpoint /forms/web_importTFTP. The CVSS score for this vulnerability is 8.8, indicating a significant potential for exploitation. Organizations using affected devices must recognize the urgency of addressing this vulnerability to mitigate the associated risks.
The affected devices include WAC-2004 1.7, WAC-1001 2.1, WAC-1001-T 2.1, OnCell G3470A-LTE-EU 1.7, and several others. Given the nature of this vulnerability, organizations should prioritize patching immediately.
Risk to organizations includes significant impacts on confidentiality, integrity, and availability of the affected systems. Attackers may leverage this vulnerability to execute arbitrary commands on the device, potentially leading to unauthorized access and control.
As of now, there are no known exploits or public proof-of-concept (PoC) available for this vulnerability. However, the potential risk remains high, and organizations must remain vigilant.
Vulnerability Details
The vulnerability allows authenticated command injection, which can be exploited through the targeted endpoint. The CVSS score of 8.8 reflects a high level of severity, categorizing it as a critical issue that requires immediate attention.
This vulnerability is classified under CWE-78, which pertains to command injection vulnerabilities. Organizations using affected MOXA products should be aware of the potential for exploitation and take steps to remediate.
Technical Analysis
The root cause of CVE-2021-39279 lies in insufficient input validation for the /forms/web_importTFTP endpoint, allowing attackers to inject commands into the system. The attack vector is network-based, requiring minimal complexity for exploitation. With low privileges required for an authenticated user, the potential for damage increases.
The impacts on confidentiality, integrity, and availability are profound, as attackers may execute unauthorized commands that could alter device configurations or access sensitive data.
Risk & Impact Analysis
Organizations deploying MOXA devices should acknowledge the real-world risks associated with CVE-2021-39279. With a potential attack surface that includes multiple device types and firmware versions, the blast radius could be extensive.
The urgency for remediation is elevated due to the high CVSS score and the significant impacts on confidentiality, integrity, and availability. Organizations should address this vulnerability in their priority patch cycle.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
Affected versions include WAC-2004 firmware 1.7, WAC-1001 firmware 2.1, WAC-1001-T firmware 2.1, OnCell G3470A-LTE-EU firmware 1.7, OnCell G3470A-LTE-EU-T firmware 1.7, TAP-323-EU-CT-T firmware 1.3, TAP-323-US-CT-T firmware 1.3, TAP-323-JP-CT-T firmware 1.3, WDR-3124A-EU firmware 2.3, WDR-3124A-EU-T firmware 2.3, WDR-3124A-US firmware 2.3, and WDR-3124A-US-T firmware 2.3.
Mitigation & Remediation
Organizations should prioritize patching their MOXA devices to the latest firmware versions to remediate this vulnerability. If a patch is unavailable, implementing network controls to restrict access to affected devices is critical. Additionally, organizations may consider adopting a penetration testing approach to validate the security of their devices and configurations.
Detection Guidance
Monitoring should focus on log indicators that may suggest unauthorized command execution. Organizations should look for behavioral anomalies in device operations, unauthorized access attempts, and unexpected changes to device configurations.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2021-39279 lies in its representation of vulnerabilities that allow command execution via authenticated access. This pattern highlights the need for organizations to enforce strict input validation and access controls on their network devices. Security teams should take this as a reminder of the importance of proactive security measures and consider penetration testing methodologies to enhance their security posture.
As organizations adapt to evolving threats, they must maintain awareness of vulnerabilities like CVE-2021-39279. This case serves as a strategic defensive takeaway, emphasizing the continuous need for security assessments and updating security protocols.
To further enhance security practices, organizations should consider engaging in vulnerability management programs and regular security training sessions for staff.
Ultimately, a comprehensive understanding of vulnerabilities and proactive remediation efforts are essential in maintaining the integrity and security of networked devices.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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