CVE-2020-6880 in ZXV10 W908
Summary
by MITRE • 12/01/2020
A ZXELINK wireless controller has a SQL injection vulnerability. A remote attacker does not need to log in. By sending malicious SQL statements, because the device does not properly filter parameters, successful use can obtain management rights. This affects: ZXV10 W908 all versions before MIPS_A_1022IPV6R3T6P7Y20.
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Analysis
by VulDB Data Team • 12/11/2020
The CVE-2020-6880 vulnerability represents a critical SQL injection flaw in ZXELINK wireless controllers, specifically affecting the ZXV10 W908 device model. This vulnerability operates at the application layer and demonstrates a fundamental failure in input validation and parameter sanitization within the device's web interface. The flaw allows unauthenticated remote attackers to execute malicious SQL commands against the device's database without requiring any prior authentication credentials, making it particularly dangerous in networked environments where such devices may be directly exposed to external networks.
The technical exploitation of this vulnerability stems from inadequate parameter filtering mechanisms within the wireless controller's web application. When the device processes user input through its web interface, it fails to properly sanitize or validate incoming parameters before incorporating them into SQL queries. This classic input validation failure creates an opening for attackers to inject malicious SQL code that can manipulate the underlying database. The vulnerability specifically affects all versions of the ZXV10 W908 before the MIPS_A_1022IPV6R3T6P7Y20 firmware release, indicating that this was a known issue that required a specific firmware update to address the underlying code flaws.
The operational impact of this vulnerability extends far beyond simple data extraction, as successful exploitation can grant attackers full administrative privileges over the wireless controller. This level of access enables attackers to modify network configurations, disable security features, compromise wireless network access, and potentially use the device as a pivot point for further attacks within the network infrastructure. The vulnerability's remote nature eliminates the need for physical access or network proximity, making it particularly attractive to attackers who may be targeting multiple devices across different geographical locations. The lack of authentication requirements means that any network-connected device running the vulnerable firmware could be compromised simply by sending malicious SQL statements to the appropriate network ports.
Security professionals should note that this vulnerability aligns with CWE-89, which specifically addresses SQL injection flaws, and represents a clear violation of secure coding practices that should be implemented across all web applications. The ATT&CK framework categorizes this type of vulnerability under T1190 - Exploit Public-Facing Application, as it involves targeting externally accessible network services. Organizations should prioritize immediate firmware updates to address this vulnerability, implement network segmentation to limit exposure of critical devices, and conduct thorough network scans to identify any other potentially vulnerable devices. The remediation process requires not only updating the firmware to the patched version but also implementing proper input validation mechanisms and conducting regular security assessments to prevent similar vulnerabilities from emerging in the future.