CVE-2019-7440 in 4G M2S
Summary
by MITRE
JioFi 4G M2S 1.0.2 devices have CSRF via the SSID name and Security Key field under Edit Wi-Fi Settings (aka a SetWiFi_Setting request to cgi-bin/qcmap_web_cgi).
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 09/23/2024
The vulnerability identified as CVE-2019-7440 affects JioFi 4G M2S 1.0.2 devices and represents a critical cross-site request forgery flaw that compromises the wireless network configuration capabilities of these mobile hotspots. This vulnerability specifically targets the web interface of the device where users can modify Wi-Fi settings through a SetWiFi_Setting request processed by the cgi-bin/qcmap_web_cgi endpoint. The flaw allows attackers to manipulate the SSID name and Security Key fields without proper authentication or authorization, effectively enabling unauthorized modification of wireless network parameters. The device's web management interface lacks adequate protection mechanisms to validate the authenticity of requests originating from the legitimate user interface, creating a significant security gap that could be exploited by malicious actors.
The technical implementation of this vulnerability stems from the absence of proper request validation and anti-CSRF token mechanisms within the device's web server implementation. When users navigate to the Edit Wi-Fi Settings page, the device fails to implement sufficient security controls to ensure that configuration changes originate from authenticated administrative sessions. The SetWiFi_Setting request processing does not verify the source of the request or validate that it stems from an authorized administrative session, allowing attackers to craft malicious requests that modify the wireless network configuration parameters. This flaw directly maps to CWE-352, which defines Cross-Site Request Forgery as a vulnerability where an attacker tricks a victim into performing actions they did not intend to perform, and aligns with ATT&CK technique T1072 for Application Deployment Software, as it involves exploitation of web-based administrative interfaces.
The operational impact of this vulnerability extends beyond simple unauthorized configuration changes, as it provides attackers with the ability to completely compromise the wireless network security posture of affected devices. An attacker who successfully exploits this vulnerability could change the SSID to a misleading name, potentially enabling social engineering attacks, or modify the security key to a value known to the attacker, thereby gaining unauthorized access to the network. The consequences include potential data interception, man-in-the-middle attacks, and unauthorized network access that could compromise the confidentiality and integrity of all data transmitted through the compromised device. Additionally, the vulnerability could be exploited to create persistent backdoors or to disable security features entirely, making the device a potential entry point for broader network attacks.
Mitigation strategies for this vulnerability require immediate implementation of proper authentication and authorization controls within the device's web interface. The device should implement robust anti-CSRF token mechanisms that are validated on each request to ensure that configuration changes originate from legitimate administrative sessions. Network administrators should ensure that devices are updated with firmware patches that address this vulnerability, and that default administrative credentials are changed immediately upon device deployment. Security monitoring should be implemented to detect unauthorized configuration changes, and network segmentation should be employed to limit the potential impact of successful exploitation. Organizations should also consider implementing network access control measures that can detect and prevent unauthorized wireless network access points from connecting to their networks, as this vulnerability could enable attackers to create rogue access points that appear legitimate to network users. The vulnerability demonstrates the critical importance of implementing proper web application security controls in embedded devices and highlights the need for comprehensive security testing of all network management interfaces.