CVE-2022-23046: Phpipam SQL Injection Vulnerability

CVE-2022-23046 Overview

CVE-2022-23046 is a SQL Injection vulnerability in PhpIPAM v1.4.4 that allows an authenticated admin user to inject arbitrary SQL statements through the "subnet" parameter when searching for subnets via the app/admin/routing/edit-bgp-mapping-search.php endpoint. This vulnerability enables attackers with administrative access to directly manipulate database queries, potentially leading to unauthorized data access, modification, or complete database compromise.

Critical Impact

Authenticated administrators can exploit this SQL injection flaw to extract sensitive network management data, modify database records, or potentially execute operating system commands depending on database configuration, compromising the integrity of the entire IP address management infrastructure.

Affected Products

• PhpIPAM version 1.4.4
• PhpIPAM IP Address Management Software

Discovery Timeline

• 2022-01-19 - CVE-2022-23046 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-23046

Vulnerability Analysis

This SQL Injection vulnerability exists in the BGP mapping search functionality of PhpIPAM's administrative interface. The application fails to properly sanitize user-supplied input in the "subnet" parameter before incorporating it into SQL queries. When an authenticated administrator performs a subnet search through the routing configuration interface, the malicious input is directly concatenated into the database query without adequate validation or parameterization.

The vulnerability requires administrative authentication to exploit, which limits the attack surface to users who already have elevated privileges or scenarios where admin credentials have been compromised. However, in multi-administrator environments or situations involving insider threats, this vulnerability presents significant risk.

Root Cause

The root cause of this vulnerability is improper input validation and the use of unsanitized user input in SQL query construction within the edit-bgp-mapping-search.php file. The application directly incorporates the "subnet" parameter value into database queries without using prepared statements or proper input escaping, allowing attackers to inject malicious SQL syntax that alters the intended query logic.

Attack Vector

The attack is network-accessible and requires an authenticated session with administrative privileges. An attacker can exploit this vulnerability by:

1. Authenticating to the PhpIPAM administrative interface with valid admin credentials
2. Navigating to the BGP routing mapping search functionality
3. Injecting SQL syntax into the "subnet" search parameter
4. The malicious SQL is executed against the backend database, allowing data extraction, modification, or other database operations

The exploitation technique involves crafting specially formatted input that breaks out of the intended SQL query context and appends additional SQL commands. Common attack patterns include UNION-based injection for data extraction, time-based blind injection for data enumeration, or stacked queries for data manipulation depending on the database configuration.

For detailed technical exploitation information, refer to the Packet Storm SQL Injection Report and the Fluid Attacks Advisory.

Detection Methods for CVE-2022-23046

Indicators of Compromise

• Unusual SQL error messages in PhpIPAM application logs indicating query syntax errors
• Abnormal database query patterns originating from the edit-bgp-mapping-search.php endpoint
• Unexpected access to the BGP mapping search functionality by administrator accounts
• Database audit logs showing queries with suspicious SQL keywords (UNION, SELECT, DROP, etc.) in subnet search operations

Detection Strategies

• Implement Web Application Firewall (WAF) rules to detect SQL injection patterns in HTTP parameters
• Monitor application logs for SQL syntax errors that may indicate injection attempts
• Deploy database activity monitoring to identify anomalous queries from the PhpIPAM application
• Configure intrusion detection systems to alert on requests containing common SQL injection payloads targeting the BGP mapping search endpoint

Monitoring Recommendations

• Enable verbose logging for the PhpIPAM application to capture all administrative actions
• Implement real-time alerting for database query anomalies and errors
• Monitor network traffic to the PhpIPAM administrative interface for unusual request patterns
• Review administrator account activity logs regularly for signs of credential compromise or misuse

How to Mitigate CVE-2022-23046

Immediate Actions Required

• Upgrade PhpIPAM to version 1.4.5 or later immediately to address this vulnerability
• Audit administrator accounts and remove unnecessary privileged access
• Review database and application logs for any signs of prior exploitation
• Implement network segmentation to restrict access to the PhpIPAM administrative interface

Patch Information

The vulnerability has been addressed in PhpIPAM version 1.4.5. Organizations should upgrade to this version or later to remediate the SQL injection flaw. The patched release is available from the GitHub PHPIPAM v1.4.5 Release.

Workarounds

• Restrict network access to the PhpIPAM administrative interface using firewall rules or VPN requirements
• Implement additional authentication layers such as multi-factor authentication for admin accounts
• Deploy a Web Application Firewall with SQL injection detection rules in front of the PhpIPAM application
• Limit database user privileges for the PhpIPAM application to reduce the impact of successful exploitation

# Example: Restrict access to PhpIPAM admin interface via Apache configuration
<Directory "/var/www/html/phpipam/app/admin">
    Require ip 10.0.0.0/8
    Require ip 192.168.0.0/16
</Directory>