CVE-2018-0630 in W300P
Summary
by MITRE
Aterm W300P Ver1.0.13 and earlier allows attacker with administrator rights to execute arbitrary OS commands via sysCmd parameter.
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Analysis
by VulDB Data Team • 04/27/2020
The vulnerability identified as CVE-2018-0630 affects the Aterm W300P router model running firmware versions 1.0.13 and earlier. This represents a critical command injection flaw that enables authenticated attackers with administrative privileges to execute arbitrary operating system commands on the affected device. The vulnerability stems from insufficient input validation within the sysCmd parameter handling mechanism, which fails to properly sanitize user-supplied data before incorporating it into system command executions.
This security flaw operates as a classic command injection vulnerability where malicious input passed through the sysCmd parameter is directly interpreted and executed by the underlying operating system without proper sanitization or escaping mechanisms. The vulnerability falls under CWE-77 which specifically addresses command injection flaws in software systems. When an authenticated administrator interacts with the device through its web interface or API endpoints, they inadvertently provide input that gets concatenated into system commands, creating an opportunity for attackers to escalate their privileges and gain complete control over the device's operating system.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with full system control including the ability to modify device configurations, install malicious software, exfiltrate sensitive data, or use the compromised device as a pivot point for further attacks within the network. The attack surface becomes particularly concerning when considering that many network devices are deployed in environments where administrative access is required for legitimate purposes, making the attack vector more accessible. This vulnerability directly maps to ATT&CK technique T1059.001 which covers command and scripting interpreter execution, and T1068 which addresses exploit for privilege escalation.
Mitigation strategies should focus on immediate firmware updates to versions that address the command injection vulnerability, as well as implementing network segmentation to limit access to administrative interfaces. Organizations should enforce strict input validation controls and implement proper parameter sanitization techniques to prevent similar vulnerabilities from occurring in other components. Additionally, network monitoring should be enhanced to detect unusual command execution patterns that might indicate exploitation attempts. The vulnerability demonstrates the critical importance of validating all user inputs and implementing proper security controls in embedded systems that are often overlooked in favor of functionality. Regular security assessments and penetration testing of network infrastructure components are essential to identify and remediate similar command injection vulnerabilities before they can be exploited by malicious actors.