CVE-2021-37912 in OAKlouds Mobile Portal
Summary
by MITRE • 09/16/2021
The HGiga OAKlouds mobile portal does not filter special characters of the Ethernet number parameter of the network interface card setting page. Remote attackers can use this vulnerability to perform command injection and execute arbitrary commands in the system without logging in.
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Analysis
by VulDB Data Team • 09/19/2021
The CVE-2021-37912 vulnerability affects the HGiga OAKlouds mobile portal, representing a critical command injection flaw that stems from inadequate input validation within the network interface card settings page. This vulnerability specifically targets the Ethernet number parameter, which fails to properly filter or sanitize special characters that could be interpreted as command delimiters or injection sequences. The absence of proper input sanitization creates an exploitable entry point where remote attackers can craft malicious payloads containing command injection sequences that bypass authentication requirements entirely.
The technical implementation of this vulnerability aligns with CWE-77, which describes command injection flaws occurring when user-supplied data is directly incorporated into system commands without proper sanitization. Attackers can leverage this weakness by submitting specially crafted Ethernet number values containing shell metacharacters such as semicolons, pipes, or backticks that execute arbitrary system commands. The vulnerability's remote exploitability means that no authentication is required to initiate the attack, making it particularly dangerous for publicly accessible network management interfaces. This flaw essentially provides attackers with a backdoor execution path that operates at the system level, potentially enabling complete system compromise.
The operational impact of CVE-2021-37912 extends beyond simple command execution, as it represents a fundamental failure in the application's security architecture and input validation mechanisms. Network administrators managing HGiga OAKlouds portals face significant risk of unauthorized access, data exfiltration, system compromise, and potential lateral movement within network infrastructure. The vulnerability's persistence across authentication boundaries means that attackers can perform actions such as modifying network configurations, accessing sensitive system files, establishing persistent backdoors, or launching further attacks against connected systems. This type of vulnerability directly impacts the CIA triad, compromising confidentiality, integrity, and availability of the affected network management platform.
Security mitigations for CVE-2021-37912 should focus on implementing comprehensive input validation and sanitization measures at the application level. The most effective remediation involves implementing strict parameter validation that filters or rejects special characters that could enable command injection attacks. Organizations should deploy proper output encoding techniques and consider implementing web application firewalls to detect and block suspicious command injection patterns. Additionally, following the principle of least privilege and implementing proper access controls can help limit the damage from successful exploitation attempts. The vulnerability's classification under ATT&CK technique T1059.001 (Command and Scripting Interpreter) highlights the need for defensive measures that monitor and restrict command execution patterns within network management systems. Regular security assessments and input validation testing should be conducted to ensure that similar vulnerabilities are not present in other application components, as this flaw represents a broader category of insecure programming practices that require systematic remediation across the entire software development lifecycle.