CVE-2020-7805 in Slim Egg IML500
Summary
by MITRE
An issue was discovered on KT Slim egg IML500 (R7283, R8112, R8424) and IML520 (R8112, R8368, R8411) wifi device. This issue is a command injection allowing attackers to execute arbitrary OS commands.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 10/16/2020
The vulnerability identified as CVE-2020-7805 affects KT Slim egg wireless devices operating on firmware versions R7283, R8112, R8424, and R8368, R8411 across multiple model lines. These devices are consumer-grade networking appliances designed for home and small office environments, typically featuring wireless connectivity capabilities and management interfaces. The affected devices represent a class of IoT products that lack proper input validation mechanisms, creating a critical security gap in their operational security posture.
This vulnerability manifests as a command injection flaw that occurs within the device's web-based management interface or wireless configuration handling components. The root cause lies in insufficient sanitization of user-supplied input parameters that are directly passed to underlying operating system commands without proper validation or encoding. Attackers can exploit this weakness by crafting malicious input that gets interpreted as shell commands, effectively allowing arbitrary code execution on the device's operating system level. The vulnerability falls under the CWE-77 attack pattern category, which specifically addresses command injection flaws in software systems where user-controllable data is used in system calls or shell commands without adequate sanitization.
The operational impact of this vulnerability is severe and multifaceted, as it provides attackers with complete control over the affected devices. Once exploited, adversaries can execute arbitrary commands with the privileges of the device's operating system user, potentially enabling them to install malware, modify device configurations, redirect network traffic, or use the device as a pivot point for attacking other systems within the local network. The vulnerability affects not only the device's immediate functionality but also compromises the security of the entire network infrastructure it connects to, making it a critical concern for network administrators and security professionals. This type of vulnerability directly maps to the attack pattern described in the MITRE ATT&CK framework under the T1059.001 technique for command and scripting interpreter, specifically focusing on the execution of system commands through vulnerable interfaces.
Mitigation strategies for CVE-2020-7805 should prioritize immediate firmware updates from the manufacturer, as these devices are likely to have received patches addressing the input validation issues. Network segmentation and access control measures should be implemented to limit the potential damage from exploitation, including restricting access to device management interfaces to trusted network segments only. Additionally, network monitoring solutions should be deployed to detect anomalous command execution patterns that may indicate exploitation attempts. Security professionals should also consider implementing intrusion detection systems specifically configured to identify command injection patterns in network traffic and device logs. The vulnerability highlights the importance of secure coding practices and input validation in IoT device development, particularly in embedded systems where resource constraints should not compromise fundamental security principles. Organizations should conduct comprehensive vulnerability assessments of their IoT device inventories to identify similar command injection vulnerabilities and implement robust security controls to prevent unauthorized access to critical network infrastructure.