CVE-2024-7461: Forip Administracao Pabx SQLi Vulnerability

CVE-2024-7461 Overview

A SQL injection vulnerability has been identified in ForIP Tecnologia Administração PABX version 1.x. This critical security flaw affects the /authMonitCallcenter file within the monitcallcenter component, where improper handling of the user argument allows attackers to inject malicious SQL queries. The vulnerability can be exploited remotely over the network without authentication, potentially compromising the integrity and confidentiality of the underlying database system.

Critical Impact

Remote attackers can exploit this SQL injection vulnerability to bypass authentication, extract sensitive data, modify database contents, or potentially gain further access to the underlying system through database-level attacks.

Affected Products

• ForIP Administração PABX 1.x
• ForIP Tecnologia monitcallcenter component
• Systems running the vulnerable /authMonitCallcenter endpoint

Discovery Timeline

• August 5, 2024 - CVE-2024-7461 published to NVD
• September 11, 2024 - Last updated in NVD database

Technical Details for CVE-2024-7461

Vulnerability Analysis

This SQL injection vulnerability exists in the authentication mechanism of the monitcallcenter component within ForIP Tecnologia Administração PABX. The vulnerability stems from insufficient input validation when processing the user parameter in the /authMonitCallcenter endpoint. When user-supplied input is passed directly into SQL queries without proper sanitization or parameterized queries, attackers can craft malicious input that alters the intended SQL statement logic.

The vulnerability is classified under CWE-89 (Improper Neutralization of Special Elements used in an SQL Command), which is one of the most prevalent web application security weaknesses. The network-accessible nature of this vulnerability, combined with no authentication requirements, makes it particularly dangerous as it can be exploited remotely by any attacker with network access to the affected system.

Root Cause

The root cause of this vulnerability is the failure to properly sanitize or parameterize user-supplied input in the user argument before incorporating it into SQL queries. The monitcallcenter component's /authMonitCallcenter file directly concatenates user input into database queries, enabling SQL injection attacks. This represents a fundamental failure in secure coding practices, as user input should never be trusted and must always be validated and sanitized before use in database operations.

Attack Vector

The attack vector for CVE-2024-7461 is network-based, requiring no user interaction or prior authentication. An attacker can remotely send crafted HTTP requests to the /authMonitCallcenter endpoint with specially crafted payloads in the user parameter. These malicious payloads contain SQL metacharacters and commands that, when processed by the vulnerable application, alter the intended SQL query logic.

Typical SQL injection techniques applicable to this vulnerability include:

• Union-based injection to extract data from other database tables
• Boolean-based blind injection to infer information through true/false responses
• Time-based blind injection to extract data when no direct output is visible
• Error-based injection to leverage database error messages for information disclosure

The exploit has been publicly disclosed, increasing the risk of widespread exploitation. For additional technical details, refer to the VulDB entry #273554 and the security notes documentation.

Detection Methods for CVE-2024-7461

Indicators of Compromise

• Unusual HTTP requests to /authMonitCallcenter containing SQL syntax characters such as single quotes ('), double dashes (--), semicolons (;), or SQL keywords like UNION, SELECT, OR, AND
• Database error messages in application logs indicating malformed SQL queries
• Unexpected database queries or access patterns in database audit logs
• Authentication bypass events or unauthorized access to the monitcallcenter functionality

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block common SQL injection patterns targeting the /authMonitCallcenter endpoint
• Implement intrusion detection system (IDS) signatures to identify SQL injection attempts in network traffic
• Enable comprehensive logging on the affected application and monitor for suspicious parameter values in the user field
• Configure database activity monitoring to detect anomalous queries originating from the PABX application

Monitoring Recommendations

• Monitor HTTP access logs for requests containing SQL metacharacters or encoded SQL injection payloads targeting the monitcallcenter component
• Set up alerts for authentication anomalies or unexpected successful logins through the vulnerable endpoint
• Review database audit logs regularly for unauthorized data access or modification attempts
• Implement network traffic analysis to identify potential exploitation attempts from external sources

How to Mitigate CVE-2024-7461

Immediate Actions Required

• Restrict network access to the /authMonitCallcenter endpoint using firewall rules to limit exposure to trusted IP addresses only
• Implement a Web Application Firewall (WAF) with SQL injection protection rules in front of the affected application
• Monitor the affected system closely for any signs of exploitation while awaiting a vendor patch
• Consider temporarily disabling the vulnerable monitcallcenter functionality if business operations permit

Patch Information

No official patch information is currently available from ForIP Tecnologia. According to the vulnerability disclosure notes, the vendor was contacted about this security issue but did not respond. Organizations using ForIP Tecnologia Administração PABX should monitor the vendor's communications channels for any future security updates. In the absence of an official patch, organizations must rely on compensating controls and workarounds to mitigate the risk.

For ongoing updates regarding this vulnerability, reference the VulDB CTI entry.

Workarounds

• Implement input validation at the network perimeter using a WAF configured to block SQL injection patterns in requests to /authMonitCallcenter
• Use network segmentation to isolate the PABX system from untrusted networks and limit access to authorized administrators only
• Deploy an application-level proxy that sanitizes the user parameter before forwarding requests to the vulnerable endpoint
• Consider replacing the affected ForIP Tecnologia Administração PABX with an alternative solution that receives regular security updates

# Example WAF rule configuration (ModSecurity)
# Block SQL injection attempts on the vulnerable endpoint
SecRule REQUEST_URI "@contains /authMonitCallcenter" \
    "id:100001,\
    phase:2,\
    deny,\
    status:403,\
    chain"
    SecRule ARGS:user "@detectSQLi" \
        "log,\
        msg:'SQL Injection attempt detected on monitcallcenter'"