Attack Chain

1. An unauthenticated attacker identifies an Advance Gift Shop Pro Script 2.0.3 installation.
2. The attacker crafts a malicious SQL injection payload, designed to exploit the ’s’ parameter in a search query.
3. The attacker sends a specially crafted HTTP GET request to the target server, including the SQL injection payload in the ’s’ parameter (e.g., /?s=';SELECT version();--).
4. The web application fails to properly sanitize the input, passing the malicious payload directly to the SQL database.
5. The database executes the injected SQL query, returning the results to the attacker. This could include database version information or other sensitive data.
6. The attacker refines the SQL injection payload to extract more sensitive data, such as user credentials or financial information, using techniques like UNION-based injection or time-based blind injection.
7. The attacker uses the extracted credentials to gain administrative access to the application.
8. The attacker leverages administrative access to further compromise the system, potentially installing a web shell, exfiltrating sensitive data, or performing other malicious activities.

Impact

Successful exploitation of this SQL injection vulnerability (CVE-2019-25680) in Advance Gift Shop Pro Script 2.0.3 can have severe consequences. Attackers can potentially access and exfiltrate sensitive customer data, including personally identifiable information (PII), financial records, and login credentials. Modification or deletion of data can lead to business disruption and financial losses. In severe cases, attackers could gain complete control over the web server, leading to further compromise of the entire infrastructure. The impact depends on the sensitivity of the data stored in the database and the extent of the attacker’s access.

Recommendation

• Apply any available patches or updates for Advance Gift Shop Pro Script 2.0.3 to address CVE-2019-25680.
• Implement robust input validation and sanitization techniques to prevent SQL injection attacks. Focus on sanitizing the ’s’ parameter in search requests.
• Deploy the Sigma rule Detect SQL Injection Attempt via URI to identify potential exploitation attempts in web server logs.
• Consider using a web application firewall (WAF) to filter out malicious requests containing SQL injection payloads, based on the vulnerability (CVE-2019-25680).
• Regularly monitor web server logs for suspicious activity, such as unusual database queries or error messages, as identified by the Sigma rule below.