Attack Chain

1. The attacker identifies a vulnerable Smartshop version 1 instance.
2. The attacker crafts a malicious HTTP GET request targeting the category.php endpoint.
3. The attacker injects a UNION-based SQL injection payload into the id parameter of the GET request, such as id=1 UNION SELECT ....
4. The web server processes the request and passes the malicious SQL payload to the database.
5. The database executes the injected SQL query, potentially returning sensitive data.
6. The attacker receives the database response containing the extracted data, such as usernames, passwords, or other sensitive information.
7. The attacker analyzes the extracted data for valuable information.
8. The attacker can use the extracted credentials or sensitive data for further malicious activities, such as unauthorized access or data exfiltration.

Impact

Successful exploitation of this SQL injection vulnerability can lead to the compromise of the Smartshop database, resulting in the leakage of sensitive information, including user credentials. The number of affected installations is unknown. The sectors affected are those using Smartshop version 1 for e-commerce or other purposes. If the attack succeeds, attackers can gain unauthorized access to user accounts, financial data, or other confidential information, leading to financial loss and reputational damage.

Recommendation

• Deploy the Sigma rule Detect CVE-2018-25340 Exploitation - Smartshop SQL Injection to your SIEM to identify exploitation attempts based on HTTP GET requests to category.php with SQL injection payloads.
• Apply input validation and sanitization to the id parameter in category.php to prevent SQL injection, addressing CVE-2018-25340 directly.
• Consider using parameterized queries or prepared statements to further mitigate the risk of SQL injection.