CVE-2025-0603: Callvision Emergency Code SQLi Vulnerability

CVE-2025-0603 Overview

CVE-2025-0603 is a critical SQL Injection vulnerability discovered in Callvision Healthcare's Callvision Emergency Code application. The vulnerability allows attackers to execute malicious SQL commands against the backend database through improper neutralization of special elements in user-supplied input. This flaw enables both standard SQL Injection and Blind SQL Injection attacks, potentially compromising sensitive healthcare data and system integrity.

Critical Impact

Unauthenticated attackers can exploit this SQL Injection vulnerability to extract, modify, or delete sensitive healthcare data, bypass authentication mechanisms, and potentially achieve remote code execution on the underlying database server.

Affected Products

• Callvision Emergency Code versions prior to V3.0
• Callvision Healthcare emergency code management systems
• Healthcare facilities using vulnerable Callvision deployments

Discovery Timeline

• 2025-10-07 - CVE-2025-0603 published to NVD
• 2025-10-08 - Last updated in NVD database

Technical Details for CVE-2025-0603

Vulnerability Analysis

This vulnerability stems from CWE-89: Improper Neutralization of Special Elements used in an SQL Command. The Callvision Emergency Code application fails to properly sanitize user-controlled input before incorporating it into SQL queries. This allows attackers to inject malicious SQL syntax that gets executed by the database engine with the privileges of the application's database user.

The vulnerability is particularly severe because it requires no authentication and can be exploited remotely over the network. Attackers can leverage both direct SQL Injection techniques, where error messages reveal database information, and Blind SQL Injection methods, where attackers infer data through application behavior differences or timing attacks.

Healthcare applications are high-value targets due to the sensitive nature of protected health information (PHI) they process. Successful exploitation could lead to HIPAA compliance violations and significant data breaches.

Root Cause

The root cause of CVE-2025-0603 is the failure to implement proper input validation and parameterized queries in the Callvision Emergency Code application. User-supplied data is directly concatenated into SQL statements without sanitization, escaping, or the use of prepared statements. This allows attackers to manipulate the query structure by injecting SQL metacharacters such as single quotes, semicolons, and SQL keywords.

Attack Vector

The attack vector for this vulnerability is network-based, requiring no authentication or user interaction. An attacker can craft malicious HTTP requests containing SQL injection payloads targeting vulnerable input parameters. The application processes these requests and passes unsanitized input directly to the database layer, where the injected SQL commands are executed.

Exploitation techniques may include:

• Union-based injection - Appending UNION SELECT statements to extract data from other tables
• Boolean-based blind injection - Using conditional statements to infer data character by character
• Time-based blind injection - Leveraging database sleep functions to extract information through response delays
• Stacked queries - Executing multiple SQL statements to modify or delete data

For detailed technical information on this vulnerability, refer to the USOM Security Advisory TR-25-0320.

Detection Methods for CVE-2025-0603

Indicators of Compromise

• Unusual database query patterns containing SQL keywords in user input fields such as UNION, SELECT, DROP, or -- comment sequences
• Web application logs showing requests with encoded SQL injection payloads including URL-encoded quotes and semicolons
• Database logs indicating query errors, syntax exceptions, or unauthorized table access attempts
• Unexpected data extraction or modification in healthcare records without corresponding user actions

Detection Strategies

• Deploy Web Application Firewalls (WAF) with SQL injection rule sets to inspect and block malicious requests
• Implement database activity monitoring to detect anomalous query patterns and unauthorized data access
• Configure application logging to capture full request parameters for forensic analysis
• Use intrusion detection systems with signatures for common SQL injection patterns and healthcare application attacks

Monitoring Recommendations

• Enable verbose logging on the Callvision Emergency Code application to capture all user input parameters
• Monitor database server logs for failed authentication attempts, syntax errors, and unusual query execution times
• Set up alerts for bulk data retrieval operations or access to sensitive tables outside normal business patterns
• Implement network traffic analysis to detect exfiltration of healthcare data following successful exploitation

How to Mitigate CVE-2025-0603

Immediate Actions Required

• Upgrade Callvision Emergency Code to version V3.0 or later immediately
• Implement Web Application Firewall rules to block common SQL injection attack patterns as a temporary protective measure
• Review database access logs for any signs of prior exploitation attempts
• Restrict network access to the application to trusted IP ranges where operationally feasible
• Ensure database accounts used by the application follow the principle of least privilege

Patch Information

Callvision Healthcare has addressed this vulnerability in Callvision Emergency Code version V3.0. Organizations running earlier versions should prioritize upgrading to the patched release. For additional guidance, consult the USOM Security Advisory TR-25-0320.

Workarounds

• Deploy a Web Application Firewall (WAF) in front of the application to filter SQL injection attempts while patching is scheduled
• Implement network segmentation to isolate the Callvision application from untrusted networks
• Disable or restrict access to vulnerable endpoints if they are not critical to operations
• Enable database query logging and real-time alerting to detect exploitation attempts

# Example WAF rule to block common SQL injection patterns (ModSecurity)
SecRule ARGS "@rx (?i)(\bunion\b.*\bselect\b|\bselect\b.*\bfrom\b|\binsert\b.*\binto\b|\bdelete\b.*\bfrom\b|--|\#|\/\*)" \
    "id:100001,phase:2,deny,status:403,msg:'SQL Injection Attempt Blocked'"