CVE-2025-14179 SQL Injection Vulnerability in pdo_firebird

CVE-2025-14179 is a SQL injection vulnerability affecting the pdo_firebird component. The vulnerability stems from the improper handling of NUL bytes within quoted strings, which can allow an attacker to inject arbitrary SQL code. While the specific details of exploitation are not provided in the source material, the nature of SQL injection vulnerabilities makes it a critical issue for defenders. Successful exploitation could lead to unauthorized access to sensitive data, modification of database records, or even complete compromise of the underlying system. Defenders should prioritize patching and implementing mitigations to prevent potential exploitation.

Attack Chain

1. The attacker identifies a web application or service utilizing pdo_firebird to interact with a Firebird database.
2. The attacker locates an input field (e.g., search box, login form, API endpoint) that passes user-supplied data to a SQL query.
3. The attacker crafts a malicious input string containing a NUL byte followed by SQL injection code. For example: “test\x00’ OR ‘1’=‘1”.
4. The pdo_firebird component fails to properly sanitize the input string, allowing the NUL byte to prematurely terminate the string while the injected SQL code remains.
5. The modified SQL query is executed against the Firebird database.
6. The injected SQL code bypasses intended security measures and gains unauthorized access to data.
7. The attacker retrieves sensitive information from the database, such as user credentials, financial records, or confidential business data.
8. The attacker may further exploit the vulnerability to modify or delete data, or potentially gain control of the database server.

Impact

Successful exploitation of CVE-2025-14179 could lead to significant data breaches, financial losses, and reputational damage. The number of potential victims and the specific sectors targeted are unknown, but any organization utilizing vulnerable versions of pdo_firebird are at risk. If the attack succeeds, attackers can gain complete control over the database, potentially leading to severe operational disruptions and legal liabilities.

Recommendation

• Apply the security updates provided by Microsoft to address CVE-2025-14179 (reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-14179).
• Implement input validation and sanitization measures to prevent SQL injection attacks, specifically focusing on handling NUL bytes (reference: overview section).
• Monitor web server logs for suspicious activity related to SQL injection attempts (reference: rules below, logsource: webserver).
• Deploy the Sigma rules provided to detect potential exploitation attempts in your environment (reference: rules below).
• Consider using a web application firewall (WAF) to filter out malicious requests containing SQL injection payloads (reference: rules below).