CVE-2021-47782: GateKeeper SQL Injection Vulnerability

CVE-2021-47782 Overview

CVE-2021-47782 is a SQL injection vulnerability affecting Odine Solutions GateKeeper 1.0. The vulnerability exists in the trafficCycle API endpoint, allowing remote attackers to inject malicious database queries. Attackers can exploit this flaw by sending crafted payloads to the /rass/api/v1/trafficCycle/ endpoint to manipulate PostgreSQL database queries and potentially extract sensitive information from the backend database.

Critical Impact

Remote attackers with low privileges can exploit this SQL injection vulnerability to access and exfiltrate sensitive data from the PostgreSQL database, potentially compromising confidentiality and data integrity.

Affected Products

• Odine Solutions GateKeeper 1.0
• Systems running the vulnerable /rass/api/v1/trafficCycle/ API endpoint
• PostgreSQL databases connected to vulnerable GateKeeper instances

Discovery Timeline

• 2026-01-16 - CVE-2021-47782 published to NVD
• 2026-01-16 - Last updated in NVD database

Technical Details for CVE-2021-47782

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) in Odine Solutions GateKeeper 1.0 allows attackers to inject arbitrary SQL commands through the trafficCycle API endpoint. The vulnerability can be exploited over the network and requires low privileges to execute. The primary impact is on data confidentiality, with potential for high-impact data extraction from the PostgreSQL database. There is also a lower-severity risk of data modification through injected queries.

The vulnerability is documented in public security resources including an Exploit-DB entry and a VulnCheck advisory.

Root Cause

The root cause of this vulnerability is improper input validation and sanitization in the trafficCycle API endpoint. User-supplied input is concatenated directly into PostgreSQL queries without adequate parameterization or escaping, allowing attackers to break out of the intended query structure and inject malicious SQL commands.

Attack Vector

The attack is network-based and targets the /rass/api/v1/trafficCycle/ API endpoint. An attacker with low-level privileges can craft malicious HTTP requests containing SQL injection payloads. When these requests are processed by the vulnerable GateKeeper application, the injected SQL commands are executed against the PostgreSQL database.

The vulnerability allows attackers to perform operations such as extracting sensitive data through UNION-based or blind SQL injection techniques, enumerating database schema and table structures, and potentially modifying data depending on database permissions.

For technical details and proof-of-concept information, refer to the Exploit-DB #50381 entry.

Detection Methods for CVE-2021-47782

Indicators of Compromise

• Unusual or malformed requests to the /rass/api/v1/trafficCycle/ endpoint containing SQL syntax characters such as single quotes, UNION statements, or comment markers
• Database error messages in application logs indicating SQL syntax errors from unexpected input
• Unexpected data access patterns or queries against PostgreSQL tables not typically accessed by the application
• Network traffic containing encoded SQL injection payloads targeting the trafficCycle API

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect and block common SQL injection patterns in requests to the trafficCycle endpoint
• Enable detailed logging on the GateKeeper application and PostgreSQL database to capture suspicious query patterns
• Deploy intrusion detection systems (IDS) with signatures for SQL injection attack patterns
• Monitor application logs for database errors that may indicate injection attempts

Monitoring Recommendations

• Continuously monitor access logs for the /rass/api/v1/trafficCycle/ endpoint for anomalous request patterns
• Set up alerts for PostgreSQL query execution anomalies, including queries with unusual structure or accessing sensitive tables
• Review authentication logs for attempts by low-privilege users to access administrative data
• Implement database activity monitoring (DAM) solutions to track all queries executed against the PostgreSQL database

How to Mitigate CVE-2021-47782

Immediate Actions Required

• Restrict network access to the GateKeeper application and the /rass/api/v1/trafficCycle/ endpoint to trusted IP ranges only
• Implement input validation at the application layer to reject requests containing SQL metacharacters
• Deploy a Web Application Firewall (WAF) with SQL injection protection rules in front of the GateKeeper application
• Review database user permissions to ensure the application uses least-privilege database accounts

Patch Information

Organizations should contact Odine Solutions directly for information regarding security patches or updated versions of GateKeeper that address this SQL injection vulnerability. For product information, visit the Odine Gatekeeper Solution Overview.

Workarounds

• Implement parameterized queries or prepared statements at the application level if source code modifications are possible
• Use a reverse proxy or WAF to filter and sanitize input before it reaches the vulnerable endpoint
• Temporarily disable the trafficCycle API endpoint if it is not critical to business operations
• Apply network segmentation to isolate the GateKeeper application and its database from other critical systems

# Example WAF rule to block SQL injection patterns (ModSecurity format)
SecRule REQUEST_URI "/rass/api/v1/trafficCycle/" "chain,id:100001,phase:2,deny,status:403,log,msg:'SQL Injection Attempt Blocked'"
SecRule ARGS "@detectSQLi" "t:none,t:urlDecodeUni"