CVE-2019-7687 in jmr1140
Summary
by MITRE
cgi-bin/qcmap_web_cgi on JioFi 4 jmr1140 Amtel_JMR1140_R12.07 devices has POST based reflected XSS via the Page parameter. No sanitization is performed for user input data.
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Analysis
by VulDB Data Team • 09/15/2023
The vulnerability identified as CVE-2019-7687 affects JioFi 4 jmr1140 devices running Amtel_JMR1140_R12.07 firmware, specifically targeting the cgi-bin/qcmap_web_cgi web interface component. This issue represents a critical security flaw that exposes the device to cross-site scripting attacks through improper input validation mechanisms. The vulnerability manifests within the Page parameter of POST requests processed by the affected web interface, creating an avenue for malicious actors to inject and execute arbitrary script code within the context of authenticated users.
The technical flaw stems from the complete absence of input sanitization for user-provided data within the affected web application component. This lack of proper validation creates a reflected cross-site scripting vulnerability where malicious payloads submitted through the Page parameter are directly reflected back to users without any form of sanitization or encoding. The vulnerability operates at the application layer and affects the web-based management interface of the device, making it accessible through standard HTTP POST requests that target the specific cgi-bin endpoint.
The operational impact of this vulnerability extends beyond simple data theft or session hijacking. An attacker could leverage this reflected XSS to execute malicious scripts that could redirect users to phishing sites, steal session cookies, or perform unauthorized administrative actions on the device. The vulnerability particularly affects authenticated users who access the web interface, as the malicious scripts would execute within their browser context with the same privileges as the legitimate user. This creates a significant risk for network administrators who might unknowingly interact with compromised management interfaces.
This vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, and represents a classic case of reflected XSS where user input is immediately reflected back to the user without proper sanitization. From an ATT&CK framework perspective, this vulnerability maps to T1566.001 (Phishing via Service Provider) and T1059.007 (Command and Scripting Interpreter: JavaScript) as it enables attackers to deliver malicious JavaScript payloads through web interfaces. The vulnerability also connects to T1071.004 (Application Layer Protocol: DNS) and T1190 (Exploit Public-Facing Application) as it represents an exploitable service that could be leveraged to establish persistent access to the network.
Mitigation strategies should prioritize immediate firmware updates from the vendor to address the input validation deficiency. Network segmentation and firewall rules should be implemented to restrict access to the affected web interface from untrusted networks. Additionally, implementing Content Security Policy headers and input validation controls within the web application can provide defense-in-depth measures. Regular security assessments of networked devices should include testing for similar input validation vulnerabilities, and network monitoring should be enhanced to detect anomalous traffic patterns associated with XSS exploitation attempts. Organizations should also consider implementing web application firewalls to detect and block malicious payloads targeting known XSS vulnerabilities in their network infrastructure.