CVE-2024-35339 in FH1206
Summary
by MITRE • 05/24/2024
Tenda FH1206 V1.2.0.8(8155) was discovered to contain a command injection vulnerability via the mac parameter at ip/goform/WriteFacMac.
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Analysis
by VulDB Data Team • 08/17/2024
The vulnerability identified as CVE-2024-35339 affects the Tenda FH1206 V1.2.0.8(8155) router firmware, presenting a critical command injection flaw within the web administration interface. This issue manifests through the mac parameter in the ip/goform/WriteFacMac endpoint, which processes user-supplied input without proper sanitization or validation. The affected device operates a web server that handles configuration requests through form-based interfaces, making it susceptible to malicious input manipulation that can execute arbitrary system commands with elevated privileges.
The technical implementation of this vulnerability stems from insufficient input validation within the firmware's web application layer. When the mac parameter is submitted through the WriteFacMac form, the system fails to properly escape or filter special characters that could be interpreted by the underlying shell. This allows an attacker to inject malicious commands that get executed with the privileges of the web server process, typically running as root or with administrative access to the device. The vulnerability represents a classic command injection flaw that aligns with CWE-77 and follows patterns documented in the OWASP Top Ten as part of the injection category.
The operational impact of this vulnerability extends beyond simple unauthorized access, as it enables full compromise of the affected router. An attacker can leverage this weakness to gain persistent access to the network, modify routing tables, redirect traffic, install backdoors, or use the device as a pivot point for attacking other systems within the local network. The device's factory MAC address modification functionality becomes a vector for arbitrary code execution, potentially allowing attackers to modify firmware, disable security features, or establish persistent command and control channels. This vulnerability particularly affects enterprise and home networks where such devices serve as critical network infrastructure components.
Mitigation strategies for CVE-2024-35339 should prioritize immediate firmware updates from Tenda if available, as the manufacturer may have released patches addressing this specific vulnerability. Network segmentation and access controls should be implemented to limit exposure of administrative interfaces to trusted networks only. The principle of least privilege should be enforced by restricting access to the affected web interface through firewall rules and authentication mechanisms. Additionally, network monitoring should be enhanced to detect unusual command execution patterns or unexpected network behavior that might indicate exploitation attempts. Organizations should consider implementing intrusion detection systems that can identify malicious payloads targeting web application vulnerabilities, particularly those leveraging command injection techniques that align with ATT&CK technique T1059.001 for command and script interpreter execution. Regular security assessments and vulnerability scanning should be conducted to identify similar weaknesses in other network devices and ensure comprehensive network security posture maintenance.