CVE-2019-7745 in jmr1140
Summary
by MITRE
JioFi 4 jmr1140 Amtel_JMR1140_R12.07 devices allow remote attackers to obtain the Wi-Fi password by making a cgi-bin/qcmap_web_cgi Page=GetWiFi_Setting request and then reading the wpa_security_key field.
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Analysis
by VulDB Data Team • 09/15/2023
The vulnerability identified as CVE-2019-7745 affects JioFi 4 jmr1140 devices running Amtel_JMR1140_R12.07 firmware, representing a critical security flaw in wireless networking equipment that exposes sensitive authentication credentials to remote attackers. This issue stems from improper access control mechanisms within the device's web interface, specifically within the cgi-bin/qcmap_web_cgi endpoint that handles Wi-Fi configuration parameters. The vulnerability allows unauthenticated remote attackers to directly access the wireless network password through a simple HTTP request structure that targets the GetWiFi_Setting page functionality.
The technical implementation of this flaw involves the device's web server failing to enforce proper authentication checks before exposing sensitive configuration data through its application programming interface. When an attacker makes a request to the cgi-bin/qcmap_web_cgi endpoint with Page=GetWiFi_Setting parameter, the system responds with a structured data payload that includes the wpa_security_key field containing the plaintext Wi-Fi password. This represents a direct violation of secure coding practices and demonstrates inadequate input validation and access control enforcement mechanisms. The vulnerability is classified under CWE-284 Access Control, specifically addressing insufficient access control where unauthorized users can access protected resources.
The operational impact of this vulnerability extends beyond simple credential exposure, as it enables attackers to gain full unauthorized access to the wireless network and potentially compromise the entire device ecosystem. Once an attacker obtains the Wi-Fi password, they can establish legitimate connections to the network, potentially leading to man-in-the-middle attacks, data exfiltration, or use of the device as a pivot point for further network exploration. The remote nature of the attack means that threat actors can exploit this vulnerability from anywhere on the internet without requiring physical access to the device or local network presence. This vulnerability aligns with ATT&CK technique T1046 Network Service Scanning and T1078 Valid Accounts, as it leverages the device's legitimate network services to obtain valid authentication credentials.
Mitigation strategies for this vulnerability require immediate firmware updates from the vendor to implement proper authentication controls and access restrictions on the affected web interface endpoints. Network administrators should consider implementing network segmentation and monitoring to detect unauthorized access attempts to device management interfaces. The device should be configured to disable unnecessary web services and restrict access to management interfaces through firewall rules. Additionally, regular security assessments should be conducted to identify similar access control vulnerabilities in network infrastructure devices, particularly those with web-based management interfaces. Organizations should also implement network monitoring solutions that can detect and alert on suspicious requests to device management endpoints, as this vulnerability represents a classic example of insecure direct object reference that can be exploited through simple reconnaissance and automated scanning techniques.