CVE-2019-25457: Web-ofisi Firma SQLi Vulnerability

CVE-2019-25457 Overview

CVE-2019-25457 is an SQL injection vulnerability affecting Web Ofisi Firma v13, a corporate website management system. The vulnerability allows unauthenticated attackers to manipulate database queries by injecting malicious SQL code through the oz array parameter. Attackers can exploit this flaw by sending crafted GET requests to category pages with malicious oz[] values, enabling time-based blind SQL injection attacks to extract sensitive database information.

Critical Impact

Unauthenticated attackers can extract sensitive database information including user credentials, customer data, and potentially gain full database access through time-based blind SQL injection techniques.

Affected Products

• Web-ofisi Firma version 13.0.0
• Web Ofisi Firma v13 (cpe:2.3:a:web-ofisi:firma:13.0.0:::::::*)

Discovery Timeline

• 2026-02-22 - CVE CVE-2019-25457 published to NVD
• 2026-02-26 - Last updated in NVD database

Technical Details for CVE-2019-25457

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) exists in the Web Ofisi Firma v13 application due to improper sanitization of user-supplied input in the oz[] array parameter. The application fails to properly validate or escape data passed through this parameter before incorporating it into SQL queries, creating a classic injection point.

The vulnerability is network-accessible without requiring any authentication or user interaction, making it particularly dangerous for publicly exposed installations. Attackers can leverage time-based blind SQL injection techniques to systematically extract database contents character by character, even without visible error messages or direct query output.

Root Cause

The root cause of this vulnerability is insufficient input validation and the failure to use parameterized queries or prepared statements when processing the oz[] array parameter. When user-supplied data is directly concatenated into SQL query strings without proper sanitization, attackers can break out of the intended query structure and inject arbitrary SQL commands.

Attack Vector

The attack is conducted over the network by sending malicious HTTP GET requests to category pages within the Web Ofisi Firma application. The attacker crafts oz[] parameter values containing SQL injection payloads designed for time-based blind extraction.

In a time-based blind SQL injection attack, the attacker injects conditional SQL statements that cause deliberate time delays when certain conditions are true. By measuring response times, the attacker can infer information about the database structure and contents without receiving direct output. For example, if extracting a username character by character, the attacker sends payloads that cause delays when the correct character is guessed, allowing systematic data exfiltration.

Technical details and proof-of-concept information are available through the Exploit-DB #47145 entry and the VulnCheck SQL Injection Advisory.

Detection Methods for CVE-2019-25457

Indicators of Compromise

• Unusual GET requests to category pages containing oz[] parameters with SQL syntax such as SLEEP(), BENCHMARK(), WAITFOR DELAY, or conditional statements
• Multiple sequential requests from the same source with slightly varied oz[] values (indicative of automated extraction)
• Abnormally long response times for category page requests that may indicate successful time-based injection payloads
• Web server logs showing requests with encoded or obfuscated SQL keywords in query string parameters

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in the oz[] parameter
• Implement application-level logging to capture all requests containing array parameters and analyze for SQL syntax
• Configure intrusion detection systems (IDS) to alert on requests containing common time-based SQL injection payloads
• Monitor database query performance for unusual execution times that may indicate exploitation attempts

Monitoring Recommendations

• Enable detailed access logging on web servers hosting Web Ofisi Firma installations
• Implement rate limiting on category pages to slow down automated extraction attempts
• Set up alerts for multiple requests from single IP addresses with oz[] parameters
• Monitor database server CPU utilization for spikes that may indicate BENCHMARK() or heavy computation injection attacks

How to Mitigate CVE-2019-25457

Immediate Actions Required

• Implement input validation on the oz[] parameter to reject requests containing SQL metacharacters
• Deploy a Web Application Firewall with SQL injection protection rules in front of affected installations
• Consider temporarily restricting access to category pages or disabling the oz[] parameter functionality if not critical
• Audit database access logs for signs of prior exploitation and potential data exfiltration

Patch Information

No vendor patch information is currently available for this vulnerability. Organizations should contact Web-ofisi directly for remediation guidance or consult the Web-Ofisi Product Details page for updates. In the absence of an official patch, implementing compensating controls such as WAF rules and input validation at the application or server level is strongly recommended.

Workarounds

• Implement server-side input validation to sanitize all array parameters before database queries
• Deploy ModSecurity or similar WAF with OWASP Core Rule Set to block common SQL injection patterns
• Use prepared statements with parameterized queries if modifying application code is possible
• Restrict network access to the application using IP allowlisting where feasible

# Example ModSecurity rule to block SQL injection in oz[] parameter
SecRule ARGS:oz[] "@detectSQLi" \
    "id:100001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection Detected in oz[] parameter - CVE-2019-25457',\
    severity:'CRITICAL'"