Microsoft Defender for IoT Remote Code Execution Vulnerability

Vulnerability

A SQL injection vulnerability exists in the maintenanceWindow endpoint of Microsoft Azure Defender for IoT. The flaw arises from improper validation of user-supplied strings before they are used to construct SQL queries. An attacker with valid authentication credentials can exploit this to execute arbitrary SQL commands. The affected product is Microsoft Azure Defender for IoT; specific version numbers are not disclosed in the available reference [1].

Exploitation

To exploit this vulnerability, an attacker must have authenticated access to the Azure Defender for IoT instance. The attacker sends a crafted request to the maintenanceWindow endpoint containing malicious SQL input. The lack of input validation allows the injected SQL to be executed against the backend database, enabling the attacker to manipulate queries beyond their intended scope [1].

Impact

Successful exploitation allows an attacker to escalate privileges to resources normally protected from the user. This can lead to full compromise of the affected system, including the ability to read, modify, or delete sensitive data, and potentially execute arbitrary code with elevated privileges. The CVSS score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects high impact on confidentiality, integrity, and availability [1].

Mitigation

Microsoft has released a security update to address this vulnerability. Users should apply the latest patches for Azure Defender for IoT as soon as possible. No workarounds are documented in the available reference [1]. If the product is no longer supported, consider upgrading to a supported version.