Attack Chain

1. An attacker identifies an application using a vulnerable version of MikroORM (<= 6.6.9 or <= 7.0.5).
2. The attacker locates an API endpoint that utilizes one of the vulnerable MikroORM methods: wrap(entity).assign(userInput), em.nativeUpdate(), em.nativeInsert(), or em.create().
3. The attacker crafts a malicious object containing SQL injection payloads designed to exploit the lack of input validation. This payload is structured to be misinterpreted as raw SQL.
4. The attacker sends a request to the API endpoint, embedding the crafted malicious object within the userInput or other relevant data parameter.
5. The MikroORM framework processes the request, failing to properly sanitize the incoming data. The crafted object is treated as a raw SQL fragment.
6. The malicious SQL fragment is incorporated into the database query executed by MikroORM.
7. The database executes the injected SQL code, potentially allowing the attacker to read, modify, or delete data, or even execute arbitrary system commands depending on database privileges.
8. The attacker achieves unauthorized access to sensitive data, elevates privileges, or compromises the entire application and underlying database server.

Impact

Successful exploitation of this SQL injection vulnerability allows attackers to execute arbitrary SQL queries against the affected database. This can lead to the disclosure of sensitive data, modification or deletion of critical information, or even complete compromise of the database server. While the exact number of affected applications is unknown, any application utilizing vulnerable versions of MikroORM and failing to properly sanitize user input is at risk. This vulnerability has a critical severity rating due to the potential for widespread and severe impact on data confidentiality, integrity, and availability.

Recommendation

• Upgrade MikroORM to version 6.6.10 or later, or 7.0.6 or later, to address the vulnerability (Affected Packages).
• Implement robust input validation and sanitization measures on all user-supplied data before passing it to MikroORM APIs (Overview).
• Deploy the Sigma rule "Detect MikroORM SQL Injection Attempt via Native Query" to identify potential exploitation attempts (Rules).
• Review and harden database access controls to limit the potential impact of successful SQL injection attacks (Attack Chain).
• Monitor web server logs for suspicious activity related to MikroORM endpoints (Rules).