Linux SQL Injection (CVE-2026-3843)

Overview

A critical security vulnerability has been identified in the Nefteprodukttekhnika BUK TS-G Gas Station Automation System version 2.9.1 for Linux. This flaw, tracked as CVE-2026-3843, is a SQL Injection vulnerability that allows a remote attacker to execute arbitrary commands on the database. This type of attack is a primary vector for data theft and system compromise.

Vulnerability Details

The vulnerability exists in the system’s configuration module. Specifically, the /php/request.php endpoint does not properly validate or sanitize user input sent via HTTP POST requests. An attacker can craft a malicious request containing SQL commands in the sql parameter (e.g., action=do&sql=<MALICIOUS_QUERY>&reload_driver=0). Because the system directly executes this input as a database command, it gives the attacker significant control over the backend database.

Potential Impact

The impact of this vulnerability is severe. By exploiting it, an unauthenticated remote attacker can:

• Read, modify, or delete sensitive data from the gas station system’s database, including transaction records, fuel logistics, and potentially customer information.
• Achieve remote code execution (RCE) on the underlying server by leveraging database functions, leading to a full system compromise.
• Disrupt critical operations at fuel stations, causing financial and operational damage.

With a CVSS score of 9.8 (CRITICAL), this flaw poses a direct threat to the availability and security of affected fueling infrastructure. For context on how such vulnerabilities lead to real-world incidents, recent data breach reports are available at breach reports.

Remediation and Mitigation

Immediate action is required to secure affected systems.

1. Patch or Update: Contact the vendor, Nefteprodukttekhnika, immediately to obtain a patched version of the BUK TS-G Automation System software. Apply the update following the vendor’s instructions. There is no known public patch at this time, making vendor communication critical.
2. Network Segmentation: If patching is delayed, isolate the automation system’s network from untrusted networks, especially the internet. Restrict access to the system’s web interface to only authorized administrative IP addresses using firewall rules.
3. Input Validation: As a general security principle, ensure all web applications validate and sanitize user input. This specific instance underscores the ongoing need for secure coding practices to prevent SQL Injection.
4. Monitor for Exploits: Actively monitor system and network logs for suspicious POST requests to the /php/request.php endpoint. Unusual database activity or system behavior may indicate a compromise.

Stay informed on developing threats and patches by following the latest security news. Organizations using this system should treat this vulnerability with the highest priority due to its critical nature and potential for significant disruption.