CVE-2024-12510: LDAP Authentication Bypass Vulnerability

CVE-2024-12510 Overview

CVE-2024-12510 is an authentication bypass vulnerability affecting Xerox VersaLink, Phaser, and WorkCentre devices. When LDAP settings are accessed by an attacker with administrative privileges, authentication can be redirected to a malicious server, potentially exposing user credentials. This vulnerability requires both admin access to the device's web interface and an active LDAP configuration, making it a targeted attack scenario within enterprise environments.

Critical Impact

Successful exploitation could allow attackers to harvest LDAP credentials, potentially compromising Active Directory environments and enabling lateral movement within the network.

Affected Products

• Xerox VersaLink Devices
• Xerox Phaser Devices
• Xerox WorkCentre Devices

Discovery Timeline

• 2025-02-03 - CVE CVE-2024-12510 published to NVD
• 2025-02-03 - Last updated in NVD database

Technical Details for CVE-2024-12510

Vulnerability Analysis

This vulnerability falls under CWE-287 (Improper Authentication), indicating a fundamental flaw in how the affected Xerox devices validate and process LDAP authentication configuration. The attack requires an adversary to first gain administrative access to the device's web management interface, after which they can manipulate LDAP settings to redirect authentication requests to an attacker-controlled server.

The network-based attack vector means that any administrator with remote access to the device's configuration interface could potentially exploit this vulnerability. Once LDAP settings are modified, subsequent authentication attempts by users would be directed to the malicious server, allowing the attacker to capture credentials in clear text or through protocol downgrade attacks.

Root Cause

The root cause of this vulnerability lies in improper authentication validation within the LDAP configuration management functionality. The affected Xerox devices do not adequately verify the legitimacy or integrity of LDAP server configurations, allowing an authenticated administrator to redirect authentication flows to arbitrary servers without proper validation or security controls.

Attack Vector

The exploitation of this vulnerability follows a multi-stage attack pattern:

1. Initial Access: Attacker gains administrative credentials to the Xerox device through credential theft, default passwords, or other means
2. Configuration Manipulation: Attacker accesses the LDAP settings through the device's web interface and modifies the LDAP server address to point to an attacker-controlled server
3. Credential Harvesting: When legitimate users attempt to authenticate, their credentials are sent to the malicious LDAP server
4. Lateral Movement: Captured credentials can be used to access other systems within the enterprise network, particularly if LDAP is tied to Active Directory

The attack is particularly dangerous in environments where Xerox devices are integrated with enterprise directory services, as compromised credentials could provide broad network access.

Detection Methods for CVE-2024-12510

Indicators of Compromise

• Unexpected changes to LDAP server configuration in Xerox device settings
• LDAP traffic directed to unknown or unauthorized IP addresses
• Administrative login events from unusual source addresses or at abnormal times
• Failed authentication attempts on internal systems using credentials associated with the Xerox device's LDAP integration

Detection Strategies

• Monitor network traffic for LDAP connections (ports 389, 636) from Xerox devices to non-authorized LDAP servers
• Implement configuration change alerting on Xerox device management interfaces
• Review administrative access logs for the affected devices regularly
• Deploy network segmentation monitoring to detect unexpected cross-segment LDAP traffic

Monitoring Recommendations

• Enable comprehensive logging on all Xerox devices and forward logs to a centralized SIEM solution
• Configure alerts for any modifications to authentication-related settings on printer/MFP devices
• Implement baseline monitoring for expected LDAP server destinations and alert on deviations
• Review administrative user activity on network devices as part of regular security operations

How to Mitigate CVE-2024-12510

Immediate Actions Required

• Review and audit current LDAP configurations on all affected Xerox devices
• Verify that admin credentials for Xerox devices have not been compromised
• Restrict administrative access to device management interfaces to trusted networks only
• Change administrative passwords on affected devices immediately

Patch Information

Xerox has released Security Bulletin XRX25-003 addressing this vulnerability. Organizations should review the Xerox Security Bulletin XRX25-003 for specific firmware versions and update instructions. Apply the recommended firmware updates to all affected VersaLink, Phaser, and WorkCentre devices as soon as possible.

Workarounds

• Disable LDAP authentication temporarily if not business-critical while awaiting patches
• Implement network segmentation to isolate Xerox devices from sensitive network segments
• Use a dedicated VLAN for printer/MFP traffic with strict firewall rules limiting LDAP destinations
• Enable TLS/SSL for all LDAP connections and implement certificate pinning where supported
• Implement multi-factor authentication for administrative access to device management interfaces

# Network segmentation example - restrict LDAP traffic from printer VLAN
# Example iptables rules for network firewall

# Allow LDAP traffic only to authorized domain controllers
iptables -A FORWARD -s 10.10.50.0/24 -d 10.10.1.10 -p tcp --dport 389 -j ACCEPT
iptables -A FORWARD -s 10.10.50.0/24 -d 10.10.1.10 -p tcp --dport 636 -j ACCEPT

# Block all other LDAP traffic from printer VLAN
iptables -A FORWARD -s 10.10.50.0/24 -p tcp --dport 389 -j DROP
iptables -A FORWARD -s 10.10.50.0/24 -p tcp --dport 636 -j DROP