CVE-2023-3259: Dataprobe iBoot-PDU Authentication Bypass

CVE-2023-3259 Overview

CVE-2023-3259 is an authentication bypass vulnerability affecting Dataprobe iBoot Power Distribution Units (PDUs) running firmware version 1.43.03312023 or earlier. The vulnerability exists in the authentication mechanism that processes the iBootPduSiteAuth cookie. By manipulating the IP address field within this cookie, an attacker can redirect the device to connect to a rogue database server, effectively bypassing authentication controls entirely.

This vulnerability is particularly concerning as it affects critical data center infrastructure. PDUs are essential components that control power distribution to servers and networking equipment. Successful exploitation allows attackers to gain administrator-level access without valid credentials, enabling them to manipulate power levels, modify user accounts, and export confidential user information.

Critical Impact

Unauthenticated attackers can bypass authentication to gain full administrator privileges on affected iBoot PDUs, potentially disrupting critical data center operations and accessing sensitive configuration data.

Affected Products

• Dataprobe iBoot-PDU4A Series (C10, C20, N15, N20) - Firmware ≤ 1.43.03312023
• Dataprobe iBoot-PDU4SA Series (C10, C20, N15, N20) - Firmware ≤ 1.43.03312023
• Dataprobe iBoot-PDU8A Series (C10, C20, N15, N20, 2C10, 2C20, 2N15, 2N20) - Firmware ≤ 1.43.03312023
• Dataprobe iBoot-PDU8SA Series (C10, N15, N20, 2N15) - Firmware ≤ 1.43.03312023
• Dataprobe iBoot-PDU4-C20 and iBoot-PDU4-N20 - Firmware ≤ 1.43.03312023

Discovery Timeline

• August 14, 2023 - CVE-2023-3259 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2023-3259

Vulnerability Analysis

This vulnerability stems from insecure deserialization (CWE-502) in the authentication handling mechanism of Dataprobe iBoot PDU devices. The firmware fails to properly validate the contents of the iBootPduSiteAuth cookie before processing it for authentication decisions. Specifically, the IP address field embedded within this cookie is trusted without adequate verification, allowing an attacker to substitute a malicious database server address.

When a user authenticates to the iBoot PDU web interface, the device uses the cookie data to determine which authentication database to query. By crafting a cookie that points to an attacker-controlled database server, the adversary can supply arbitrary authentication responses, including responses that grant administrator privileges.

The attack requires network access to the target device and the ability to set up a rogue database that responds appropriately to authentication queries from the PDU. Since the vulnerability can be exploited remotely without any prior authentication or user interaction, it represents a significant risk to organizations deploying these devices in production environments.

Root Cause

The root cause of CVE-2023-3259 is the insecure deserialization of untrusted data within the iBootPduSiteAuth cookie. The firmware trusts client-supplied data to specify the authentication database endpoint without implementing proper validation or integrity checks. This violates the security principle of never trusting user-controlled input for security-critical decisions.

The authentication mechanism lacks server-side validation to ensure the database connection parameters match expected, pre-configured values. Additionally, there appears to be no cryptographic signing or integrity verification on the cookie contents, allowing arbitrary modification by attackers.

Attack Vector

The attack is executed over the network without requiring any prior authentication or user interaction. An attacker can exploit this vulnerability by performing the following steps:

1. The attacker sets up a rogue database server configured to respond positively to authentication queries from the target PDU
2. The attacker crafts a malicious iBootPduSiteAuth cookie containing the IP address of the rogue database server
3. The attacker sends HTTP requests to the target iBoot PDU with the manipulated cookie
4. The PDU processes the cookie and connects to the attacker's rogue database for authentication validation
5. The rogue database returns a successful authentication response with administrator privileges
6. The attacker gains full administrative access to the PDU management interface

Once authenticated, the attacker can manipulate power outlets (potentially causing service disruptions), create or modify user accounts for persistent access, export sensitive configuration and user data, and pivot to attack other connected infrastructure.

Detection Methods for CVE-2023-3259

Indicators of Compromise

• Unexpected outbound connections from iBoot PDU devices to non-standard IP addresses or external hosts
• Authentication logs showing successful logins from unknown or unexpected source IP addresses
• Modifications to user accounts or configuration settings without authorized change requests
• Power outlet state changes or scheduled events that were not initiated by legitimate administrators
• Network traffic from PDU devices to unfamiliar database server addresses on typical database ports

Detection Strategies

• Monitor network traffic from iBoot PDU devices for connections to unexpected external IP addresses, particularly on database ports
• Implement network segmentation to isolate PDU management traffic and alert on any boundary violations
• Deploy intrusion detection rules to identify anomalous HTTP requests containing manipulated iBootPduSiteAuth cookies
• Enable and aggregate authentication logs from all PDU devices to detect unusual access patterns

Monitoring Recommendations

• Establish baseline network behavior for all iBoot PDU devices and alert on deviations from normal connection patterns
• Implement periodic configuration audits to detect unauthorized changes to user accounts or device settings
• Monitor for firmware version mismatches across the PDU fleet to ensure all devices are patched
• Use network access control lists to restrict which systems can communicate with PDU management interfaces

How to Mitigate CVE-2023-3259

Immediate Actions Required

• Update all affected Dataprobe iBoot PDU devices to firmware versions newer than 1.43.03312023
• Isolate iBoot PDU devices on a dedicated management network segment with strict access controls
• Audit current user accounts and access logs on all PDU devices for signs of compromise
• Implement network-level restrictions to prevent PDU devices from initiating connections to unauthorized external hosts
• Review and strengthen firewall rules governing access to PDU management interfaces

Patch Information

Dataprobe has addressed this vulnerability in firmware releases following version 1.43.03312023. Organizations should obtain the latest firmware from Dataprobe's official support channels and apply updates to all affected devices. Refer to the Trellix Research Article for additional technical context and remediation guidance.

Workarounds

• Restrict network access to PDU management interfaces using firewall rules or VLANs, allowing connections only from trusted management stations
• Deploy a reverse proxy or web application firewall in front of PDU management interfaces to inspect and sanitize incoming requests
• Disable remote management access entirely if not required, and use local console connections for administration
• Implement multi-factor authentication at the network perimeter for any remote access to PDU management networks

# Example network isolation using iptables on a management gateway
# Restrict PDU management access to specific trusted hosts only
iptables -A FORWARD -d 192.168.100.0/24 -s 10.0.0.50 -p tcp --dport 80 -j ACCEPT
iptables -A FORWARD -d 192.168.100.0/24 -s 10.0.0.50 -p tcp --dport 443 -j ACCEPT
iptables -A FORWARD -d 192.168.100.0/24 -j DROP

# Block outbound connections from PDUs to prevent rogue database exploitation
iptables -A FORWARD -s 192.168.100.0/24 -d 192.168.100.0/24 -j ACCEPT
iptables -A FORWARD -s 192.168.100.0/24 -j DROP