CVE-2021-34111 in 4800Eco
Summary
by MITRE • 05/20/2022
Thecus 4800Eco was discovered to contain a command injection vulnerability via the username parameter in /adm/setmain.php.
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Analysis
by VulDB Data Team • 05/26/2022
Thecus 4800Eco device presents a critical command injection vulnerability identified as CVE-2021-34111, which resides within the administrative web interface at the /adm/setmain.php endpoint. This vulnerability specifically targets the username parameter, creating a pathway for malicious actors to execute arbitrary commands on the affected system. The flaw represents a significant security weakness that undermines the device's integrity and exposes it to potential compromise. The vulnerability stems from inadequate input validation and sanitization mechanisms within the web application layer, allowing attackers to inject malicious command sequences that are subsequently executed with the privileges of the web server process. This type of vulnerability falls under CWE-77 which specifically addresses command injection flaws in software applications.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it provides attackers with the capability to execute arbitrary code on the device, potentially leading to complete system compromise. An attacker could leverage this vulnerability to gain root-level access, install backdoors, modify system configurations, or extract sensitive data from the device. The attack surface is particularly concerning because the vulnerability exists within the administrative interface, meaning successful exploitation could allow full control over the device's operations and configuration settings. This aligns with ATT&CK technique T1059.001 which covers command and scripting interpreter execution, specifically highlighting the exploitation of command injection vulnerabilities to execute malicious payloads.
Security implications of CVE-2021-34111 are severe given that the vulnerability allows for remote code execution without requiring authentication for the initial exploitation phase. The affected device operates as a network-attached storage system, making it a valuable target for attackers seeking to establish persistent access points within network environments. The command injection flaw demonstrates poor secure coding practices and inadequate parameter validation, which are fundamental requirements in the OWASP Top Ten security framework. Organizations utilizing Thecus 4800Eco devices face significant risk of data breaches, system hijacking, and potential lateral movement within their networks if this vulnerability remains unpatched. The vulnerability's exploitation requires minimal technical expertise, making it particularly dangerous in environments where network security monitoring is insufficient.
Mitigation strategies for CVE-2021-34111 should prioritize immediate patching of the affected device firmware to address the command injection vulnerability. Network administrators should implement strict access controls and segmentation to limit exposure of the administrative interface to trusted networks only. Regular security assessments and input validation reviews should be conducted to prevent similar vulnerabilities from emerging in other components of the system. The vulnerability underscores the importance of secure coding practices and input sanitization as outlined in the ISO/IEC 27001 information security management standards. Additionally, implementing web application firewalls and intrusion detection systems can provide additional layers of protection against exploitation attempts. Organizations should also consider conducting penetration testing to identify other potential command injection vulnerabilities within their network infrastructure and ensure comprehensive security coverage.