CVE-2024-37567: Infoblox NIOS Auth Bypass Vulnerability

CVE-2024-37567 Overview

CVE-2024-37567 is a critical Improper Access Control vulnerability affecting Infoblox NIOS (Network Identity Operating System) through version 8.6.4. This vulnerability allows unauthorized access to Grid configurations, potentially enabling attackers to compromise the integrity and confidentiality of DNS, DHCP, and IP Address Management (IPAM) infrastructure managed by affected Infoblox appliances.

Critical Impact

Unauthorized network access could allow attackers to manipulate Grid configurations, potentially leading to complete compromise of enterprise DNS/DHCP infrastructure, data exfiltration, and network service disruption.

Affected Products

• Infoblox NIOS through version 8.6.4
• Infoblox Grid Manager appliances running vulnerable NIOS versions
• Virtual and physical Infoblox deployments with Grid functionality enabled

Discovery Timeline

• 2025-02-27 - CVE-2024-37567 published to NVD
• 2025-04-10 - Last updated in NVD database

Technical Details for CVE-2024-37567

Vulnerability Analysis

This vulnerability stems from improper access control mechanisms within the Infoblox NIOS Grid functionality. The flaw is classified under CWE-284 (Improper Access Control), indicating that the system fails to properly restrict access to authorized users or processes. The network-accessible nature of this vulnerability means attackers can exploit it remotely without requiring prior authentication or user interaction.

The impact of successful exploitation is significant, potentially allowing unauthorized parties to read sensitive Grid configuration data and modify critical network infrastructure settings. Given that Infoblox NIOS is commonly deployed as the authoritative source for enterprise DNS, DHCP, and IPAM services, compromise of these systems could have cascading effects across an organization's entire network infrastructure.

Root Cause

The root cause of CVE-2024-37567 lies in insufficient access control validation within the NIOS Grid management interface. The vulnerability exists because the system does not adequately verify that requests to Grid resources originate from properly authenticated and authorized entities. This access control weakness allows unauthorized actors to bypass intended security restrictions and interact with Grid components that should be protected.

Attack Vector

The vulnerability is exploitable over the network without requiring authentication or user interaction. An attacker with network access to a vulnerable Infoblox NIOS appliance can potentially:

1. Access Grid configuration data without proper authorization
2. Modify Grid settings to redirect DNS queries or alter DHCP configurations
3. Extract sensitive network topology and infrastructure information
4. Potentially pivot to other connected Grid members within the Infoblox deployment

The attack does not require any privileges or user interaction, making it particularly dangerous in environments where Infoblox appliances are accessible from untrusted network segments.

Detection Methods for CVE-2024-37567

Indicators of Compromise

• Unexpected or unauthorized modifications to Grid member configurations
• Anomalous API requests to Grid management endpoints from unknown IP addresses
• Audit log entries showing access to Grid resources without corresponding authentication events
• Unusual network traffic patterns to Infoblox management interfaces

Detection Strategies

• Monitor Infoblox audit logs for unauthorized Grid configuration access attempts
• Implement network-level monitoring for connections to Infoblox management ports from untrusted sources
• Deploy intrusion detection rules to identify anomalous Grid API traffic patterns
• Establish baseline Grid configuration and alert on unexpected changes

Monitoring Recommendations

• Enable comprehensive audit logging on all Infoblox NIOS appliances
• Configure SIEM integration to correlate Infoblox events with network access logs
• Implement regular Grid configuration integrity checks to detect unauthorized modifications
• Monitor for reconnaissance activity targeting Infoblox management interfaces

How to Mitigate CVE-2024-37567

Immediate Actions Required

• Review the Infoblox Support Article for official guidance and available patches
• Restrict network access to Infoblox management interfaces using firewall rules
• Audit current Grid configurations for any signs of unauthorized modification
• Implement network segmentation to isolate Infoblox appliances from untrusted networks

Patch Information

Infoblox has published guidance regarding this vulnerability. Organizations should consult the official Infoblox security advisory for specific patch availability and upgrade instructions. It is critical to upgrade NIOS installations beyond version 8.6.4 to remediate this vulnerability.

Workarounds

• Implement strict network access controls limiting management interface access to authorized administrator workstations only
• Deploy additional authentication mechanisms such as multi-factor authentication where supported
• Enable all available audit logging and monitoring features to detect exploitation attempts
• Consider placing Infoblox management interfaces behind a VPN or jump host until patches can be applied

# Network access restriction example for Infoblox management
# Restrict management access to specific trusted networks
# Consult Infoblox documentation for specific implementation

# Example firewall rule concept (adjust for your environment):
# Allow management access only from trusted admin network
# iptables -A INPUT -p tcp --dport 443 -s <admin_network_cidr> -j ACCEPT
# iptables -A INPUT -p tcp --dport 443 -j DROP