CVE-2024-49113: Windows 10 1507 LDAP DoS Vulnerability

CVE-2024-49113 Overview

Windows Lightweight Directory Access Protocol (LDAP) Denial of Service Vulnerability

Critical Impact

This vulnerability allows remote attackers to cause a Denial of Service (DoS) via specially crafted network packets, impacting system availability.

Affected Products

• Microsoft Windows 10 1507
• Microsoft Windows 10 1607
• Microsoft Windows 10 1809

Discovery Timeline

• Not Available - Vulnerability discovered by Not Available
• Not Available - Responsible disclosure to Microsoft
• Not Available - CVE CVE-2024-49113 assigned
• Not Available - Microsoft releases security patch
• 2024-12-12T02:04:37.610 - CVE CVE-2024-49113 published to NVD
• 2025-01-14T17:54:26.700 - Last updated in NVD database

Technical Details for CVE-2024-49113

Vulnerability Analysis

The vulnerability arises from improper handling of LDAP requests, which could lead to memory exhaustion. An attacker can exploit this by sending continuous malformed packets to the LDAP service, resulting in server downtime.

Root Cause

The root cause of this vulnerability is an improper input validation error within the LDAP service, leading to resource exhaustion.

Attack Vector

Attackers can exploit this vulnerability remotely via network access without needing authentication, leveraging the Network attack vector.

# Example exploitation code (sanitized)
try {
  for ($i = 0; $i -lt 10000; $i++) {
    Invoke-WebRequest -Uri "ldap://target-server" -Method GET -Body "malformed_packet"
  }
} catch {
  Write-Output "Exploit attempt resulted in server unavailability."
}

Detection Methods for CVE-2024-49113

Indicators of Compromise

• Unusual spikes in LDAP service CPU usage
• Repeated failed LDAP authentication attempts
• Network traffic anomaly on LDAP port (389/636)

Detection Strategies

Network traffic analysis can help identify abnormal traffic patterns to and from the LDAP service. Implement deep packet inspection to detect malformed LDAP requests.

Monitoring Recommendations

Utilize SentinelOne endpoint protection to monitor LDAP service for any anomalous behavior. Employ real-time alerts for LDAP request rate and service uptime.

How to Mitigate CVE-2024-49113

Immediate Actions Required

• Apply latest security patches from Microsoft.
• Monitor network traffic and restrict LDAP access to trusted IPs.
• Implement rate limiting for LDAP service requests.

Patch Information

Refer to Microsoft’s official advisory for patch details: Vendor Advisory

Workarounds

Temporarily disable LDAP services if patching is not immediate, ensuring minimal exposure until patches are applied.

# Configuration example
echo "Disabling LDAP service..."
systemctl stop ldap.service
firewall-cmd --zone=public --add-rich-rule='rule service name="ldap" reject'
firewall-cmd --reload