CVE-2019-20688 in D3600
Summary
by MITRE
Certain NETGEAR devices are affected by command injection by an authenticated user. This affects D3600 before 1.0.0.75, D6000 before 1.0.0.75, D6100 before 1.0.0.63, EX2700 before 1.0.1.48, EX6100v2 before 1.0.1.76, EX6150v2 before 1.0.1.76, EX6200v2 before 1.0.1.72, EX6400 before 1.0.2.136, EX7300 before 1.0.2.136, EX8000 before 1.0.1.180, R7800 before 1.0.2.52, R8900 before 1.0.4.2, R9000 before 1.0.4.2, WN2000RPTv3 before 1.0.1.32, WN3000RPv2 before 1.0.0.68, WN3100RPv2 before 1.0.0.60, WNDR3700v4 before 1.0.2.102, WNDR4300v1 before 1.0.2.104, WNDR4300v2 before 1.0.0.58, WNDR4500v3 before 1.0.0.58, WNR2000v5 before 1.0.0.68, and XR500 before 2.3.2.32.
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Analysis
by VulDB Data Team • 05/27/2024
This vulnerability represents a critical command injection flaw in NETGEAR networking equipment that allows authenticated users to execute arbitrary commands on affected devices. The issue stems from inadequate input validation within the web-based management interface of these routers and access points, creating a pathway for malicious actors who have gained legitimate administrative credentials to escalate their privileges and compromise the entire network infrastructure. The vulnerability affects a wide range of consumer and small office networking devices, including various models of routers, access points, and wireless repeaters across multiple product lines. According to the Common Weakness Enumeration framework, this corresponds to CWE-77, which specifically addresses command injection vulnerabilities that occur when application commands are built using untrusted input without proper sanitization or validation. The attack vector requires an authenticated user session, meaning that an adversary must first obtain valid administrative credentials through social engineering, credential stuffing, or other means of unauthorized access. Once authenticated, the attacker can exploit the command injection flaw by crafting malicious input that gets executed as system commands on the vulnerable device. The operational impact of this vulnerability extends far beyond simple privilege escalation, as compromised devices can serve as launching points for further network infiltration, data exfiltration, or even become part of botnet formations for distributed denial-of-service attacks. Network administrators face significant challenges in mitigating this risk since the affected devices are often deployed in environments where physical access is limited, making remote patching difficult. The vulnerability affects devices from multiple generations and product lines, indicating a systemic issue in the software development lifecycle of these networking solutions, particularly in how input is handled within the web management interfaces. The affected versions span several years of firmware releases, suggesting that this flaw was not properly addressed in security updates, potentially leaving networks exposed for extended periods. From an ATT&CK framework perspective, this vulnerability maps to techniques involving privilege escalation and command execution, specifically targeting the execution of arbitrary code on network infrastructure devices. The widespread nature of affected models across different device categories indicates that this is likely a fundamental architectural issue rather than an isolated incident, requiring comprehensive remediation efforts across all affected product lines. Organizations should immediately implement network segmentation to isolate affected devices, enforce strong authentication controls, and apply firmware updates as soon as they become available from NETGEAR. The vulnerability highlights critical gaps in network security practices, particularly the importance of regular firmware updates and the need for organizations to maintain inventories of all network-connected devices to identify and remediate such vulnerabilities effectively.