CVE-2018-7360 in ZXHN F670
Summary
by MITRE
All versions up to V1.1.10P3T18 of ZTE ZXHN F670 product are impacted by information exposure vulnerability, which may allow an unauthenticated attacker to get the GPON SN information via appviahttp service.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 06/06/2023
The vulnerability identified as CVE-2018-7360 affects ZTE ZXHN F670 devices running firmware versions up to V1.1.10P3T18, representing a critical information exposure flaw that compromises the security posture of network infrastructure equipment. This vulnerability specifically targets the appviahttp service component of the device, which serves as an application interface for remote management and configuration access. The flaw enables unauthenticated attackers to extract sensitive GPON serial number information without requiring any credentials or prior access privileges, fundamentally undermining the device's security model and potentially exposing critical network infrastructure details.
The technical implementation of this vulnerability stems from inadequate access controls within the appviahttp service implementation. The service fails to properly validate authentication requests or implement proper authorization checks before exposing sensitive system information including the GPON serial number. This represents a classic example of insufficient authorization as classified under CWE-285, where the system grants access to sensitive information without proper verification of the requesting entity's privileges. The vulnerability exists at the application layer where the service responds to HTTP requests without enforcing authentication mechanisms, creating an attack surface that allows any remote adversary to retrieve privileged information.
The operational impact of this vulnerability extends beyond simple information disclosure, as GPON serial numbers represent critical infrastructure identifiers that can be leveraged for further attacks within network environments. An attacker who successfully exploits this vulnerability gains access to device-specific identification information that can be used for device fingerprinting, targeted attacks against specific models, or as part of broader reconnaissance activities. The exposure of GPON serial numbers may enable attackers to craft more sophisticated attacks targeting known vulnerabilities specific to particular device models or firmware versions, potentially leading to privilege escalation or denial of service conditions.
From a threat modeling perspective, this vulnerability aligns with ATT&CK technique T1082 - System Information Discovery, where adversaries seek to gather information about the target system. The unauthenticated nature of the attack means that any network-connected device with this vulnerability can be exploited without requiring network credentials, making it particularly dangerous in environments where such devices may be exposed to untrusted networks. The vulnerability also represents a weakness in the principle of least privilege, as sensitive information is exposed without proper access controls, violating fundamental security principles that should prevent unauthorized information access.
Organizations should implement immediate mitigations including firmware updates to versions that address this vulnerability, network segmentation to limit access to affected devices, and monitoring for suspicious HTTP traffic patterns that may indicate exploitation attempts. The vulnerability highlights the importance of proper authentication and authorization controls in network infrastructure devices, particularly those that expose management interfaces to external networks. Security teams should also consider implementing network access controls and firewall rules to restrict access to the appviahttp service ports, while conducting comprehensive inventory audits to identify all affected devices within their network infrastructure. Regular security assessments and vulnerability scanning should be performed to ensure that similar issues are not present in other network equipment components.