CVE-2022-35271 in R1510
Summary
by MITRE • 10/25/2022
A denial of service vulnerability exists in the web_server hashFirst functionality of Robustel R1510 3.1.16 and 3.3.0. A specially-crafted network request can lead to denial of service. An attacker can send a sequence of requests to trigger this vulnerability.The `/action/import_cert_file/` API is affected by command injection vulnerability.
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Analysis
by VulDB Data Team • 11/25/2022
The vulnerability identified as CVE-2022-35271 affects the Robustel R1510 industrial router firmware versions 3.1.16 and 3.3.0, presenting a critical security risk that combines both denial of service and command injection capabilities. This vulnerability resides within the web_server hashFirst functionality, which serves as a core component of the device's web interface handling mechanism. The affected system processes network requests through a web server that fails to properly validate input parameters, creating exploitable pathways for malicious actors to disrupt service availability and potentially execute arbitrary commands on the affected device.
The technical flaw manifests through improper input validation within the `/action/import_cert_file/` API endpoint, which allows attackers to inject malicious commands through crafted network requests. This command injection vulnerability stems from insufficient sanitization of user-supplied data passed to the web server's hashFirst functionality, enabling an attacker to manipulate the system's execution flow by inserting command sequences that bypass normal validation checks. The vulnerability operates at the application layer and leverages the device's web interface to process requests, making it accessible through standard network protocols without requiring physical access or elevated privileges.
Operationally, this vulnerability presents a severe risk to industrial control systems and network infrastructure deployments where Robustel R1510 devices are utilized. The denial of service component can render the device completely inaccessible to legitimate users, disrupting network connectivity and potentially affecting critical operations in industrial environments. The command injection aspect amplifies the threat by potentially allowing attackers to execute arbitrary code with the privileges of the web server process, which typically runs with elevated permissions. This could lead to complete system compromise, data exfiltration, or the installation of persistent backdoors within the network infrastructure.
The vulnerability aligns with CWE-77 and CWE-400 categories, specifically addressing command injection flaws (CWE-77) and denial of service conditions (CWE-400) within web applications. From an ATT&CK framework perspective, this vulnerability maps to T1210 (Exploitation of Remote Services) and T1499 (Endpoint Denial of Service) techniques, representing both service disruption and privilege escalation capabilities. Organizations deploying these devices in operational technology environments should consider the potential for cascading failures when a single device becomes compromised, as industrial networks often rely on interconnected devices where a single point of failure can impact entire network segments.
Mitigation strategies should prioritize immediate firmware updates from Robustel to address the identified vulnerabilities, as the vendor has likely released patches to correct the input validation flaws and command injection pathways. Network segmentation and access controls should be implemented to limit exposure of these devices to untrusted networks, while monitoring systems should be deployed to detect anomalous request patterns that may indicate exploitation attempts. Additionally, organizations should conduct comprehensive vulnerability assessments of their industrial control systems to identify similar vulnerabilities in other networked devices that may be susceptible to the same class of attacks, ensuring that all components within their operational technology environments receive appropriate security hardening measures.