CVE-2019-25346: TheSystem 1.0 SQL Injection Vulnerability

CVE-2019-25346 Overview

CVE-2019-25346 is a SQL injection vulnerability affecting TheSystem 1.0 that allows attackers to bypass authentication by manipulating the server_name parameter. This vulnerability enables attackers to inject malicious SQL code to retrieve unauthorized database records and potentially access sensitive system information.

Critical Impact

Attackers can bypass authentication controls entirely, gaining unauthorized access to the application and potentially exposing all data stored in the backend database.

Affected Products

• TheSystem 1.0

Discovery Timeline

• 2026-02-12 - CVE-2019-25346 published to NVD
• 2026-02-12 - Last updated in NVD database

Technical Details for CVE-2019-25346

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) exists in the authentication mechanism of TheSystem 1.0. The application fails to properly sanitize user-supplied input in the server_name parameter before incorporating it into SQL queries. This allows attackers to inject arbitrary SQL statements that modify the query logic, bypassing authentication checks and potentially extracting sensitive data from the database.

The vulnerability can be exploited over the network with low attack complexity, requiring low privileges and no user interaction. Successful exploitation results in high confidentiality impact, allowing attackers to read unauthorized data, with limited integrity impact on the affected system.

Root Cause

The root cause of this vulnerability is improper input validation and the lack of parameterized queries in the authentication module. The server_name parameter is directly concatenated into SQL statements without sanitization, allowing metacharacters and SQL syntax to be interpreted as part of the query structure rather than as data values.

Attack Vector

The attack vector involves network-based exploitation where an attacker submits a crafted server_name parameter value containing SQL injection payloads. A common exploitation technique uses payloads such as ' or '1=1 to manipulate the SQL query logic. When the vulnerable parameter is processed, the injected SQL code is executed by the database, causing the authentication query to return true regardless of valid credentials.

The vulnerability can be exploited to:

• Bypass authentication mechanisms entirely
• Extract sensitive data from the database
• Enumerate database structure and contents
• Potentially modify or delete database records

Technical details and proof-of-concept code are available in the GitHub PoC Repository and Exploit-DB #47430.

Detection Methods for CVE-2019-25346

Indicators of Compromise

• Unusual SQL syntax patterns in web server logs containing the server_name parameter
• Authentication success from unexpected sources or with malformed credentials
• Database query logs showing unexpected OR conditions or comment sequences (--, #)
• Error messages in application logs indicating SQL syntax errors from user input

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect SQL injection patterns in the server_name parameter
• Monitor authentication logs for anomalous login patterns, especially successful logins with unusual parameter values
• Implement database activity monitoring to detect queries containing injection signatures
• Review application logs for SQL error messages that may indicate injection attempts

Monitoring Recommendations

• Enable verbose logging on web servers to capture full request parameters including server_name
• Configure database audit logging to track all authentication-related queries
• Set up alerting for multiple failed authentication attempts followed by sudden success
• Monitor for reconnaissance activity patterns typical of SQL injection testing

How to Mitigate CVE-2019-25346

Immediate Actions Required

• Restrict network access to TheSystem 1.0 instances until remediation is complete
• Implement input validation at the application layer to reject SQL metacharacters in the server_name parameter
• Deploy WAF rules to block known SQL injection patterns targeting this vulnerability
• Review database and application logs for evidence of exploitation

Patch Information

No official vendor patch information is available at this time. Refer to the VulnCheck Security Advisory for the latest remediation guidance. Organizations should consider upgrading to a newer version if available or implementing the workarounds below.

Workarounds

• Implement parameterized queries or prepared statements for all database interactions involving user input
• Apply strict input validation on the server_name parameter, allowing only expected characters (alphanumeric, hyphens, underscores)
• Deploy a Web Application Firewall with SQL injection detection rules enabled
• Implement network segmentation to limit access to TheSystem application from untrusted networks
• Consider disabling or restricting the vulnerable functionality until a patch is available

# Example WAF rule to block SQL injection in server_name parameter
# ModSecurity Rule Example
SecRule ARGS:server_name "@detectSQLi" \
    "id:100001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in server_name parameter',\
    tag:'CVE-2019-25346'"