CVE-2024-21313: Windows 10 1507 TCP/IP Info Disclosure

CVE-2024-21313 Overview

CVE-2024-21313 is an information disclosure vulnerability in the Windows TCP/IP stack that could allow an attacker to obtain sensitive information from affected systems. This vulnerability affects the core networking component responsible for handling TCP/IP communications across all supported versions of Windows operating systems, including both desktop and server editions.

The vulnerability requires user interaction and network access to exploit, making it a targeted attack vector rather than a widespread automated threat. However, successful exploitation could lead to significant confidentiality impact, potentially exposing sensitive system information or network data.

Critical Impact

Successful exploitation allows attackers to disclose sensitive information from affected Windows systems through the TCP/IP stack, potentially compromising data confidentiality across enterprise environments.

Affected Products

• Microsoft Windows 10 (versions 1507, 1607, 1809, 21H2, 22H2)
• Microsoft Windows 11 (versions 21H2, 22H2, 23H2)
• Microsoft Windows Server 2008, 2012, 2016, 2019, 2022, and 2022 23H2

Discovery Timeline

• January 9, 2024 - CVE-2024-21313 published to NVD
• November 21, 2024 - Last updated in NVD database

Technical Details for CVE-2024-21313

Vulnerability Analysis

This vulnerability exists within the Windows TCP/IP implementation and is classified under CWE-209 (Generation of Error Message Containing Sensitive Information). The flaw allows an attacker who can interact with the target system over a network to extract sensitive information that should not be accessible.

The attack requires specific conditions to be met: the attacker must have network access to the target system, and the attack complexity is high, indicating that successful exploitation depends on conditions outside the attacker's control. Additionally, user interaction is required, meaning a victim must perform some action for the attack to succeed.

The confidentiality impact is high, meaning that a successful attack could result in total disclosure of resource information or access to restricted information. However, there is no impact on system integrity or availability, making this purely an information disclosure issue.

Root Cause

The root cause is related to improper handling of information within the TCP/IP stack, specifically in how error messages or responses are generated. The vulnerability falls under CWE-209, indicating that the system may generate error messages or responses containing sensitive information that could be leveraged by an attacker to gain further insights into the system's configuration, memory contents, or other protected data.

Attack Vector

The attack is conducted over the network, requiring the attacker to send specially crafted network packets or requests to the target system. The attack scenario involves:

1. Attacker establishes network connectivity to the target system
2. Attacker sends crafted TCP/IP packets designed to trigger the vulnerable code path
3. User interaction occurs that processes the malicious input
4. The system responds with information that should be protected
5. Attacker captures and analyzes the disclosed information

The exploitation mechanism leverages weaknesses in how the Windows TCP/IP stack handles certain network operations, potentially leaking memory contents or internal state information through improperly sanitized responses.

Detection Methods for CVE-2024-21313

Indicators of Compromise

• Unusual TCP/IP traffic patterns targeting specific ports or services
• Anomalous network packet structures or malformed TCP/IP requests
• Unexpected outbound data transfers following suspicious inbound connections
• Event log entries indicating TCP/IP stack errors or exceptions

Detection Strategies

• Deploy network intrusion detection systems (NIDS) to monitor for anomalous TCP/IP traffic patterns
• Enable Windows Security Event logging and monitor for network-related security events
• Implement deep packet inspection to identify malformed or suspicious network packets
• Monitor for unusual error responses from network services that may indicate exploitation attempts

Monitoring Recommendations

• Configure SIEM solutions to correlate network anomalies with endpoint events
• Enable Windows Firewall logging to capture detailed connection information
• Monitor system event logs for TCP/IP driver errors or unexpected behavior
• Implement network traffic baselining to identify deviations from normal patterns

How to Mitigate CVE-2024-21313

Immediate Actions Required

• Apply Microsoft security updates released in January 2024 immediately
• Review network firewall rules to restrict unnecessary inbound traffic
• Enable advanced Windows Defender protections on all affected systems
• Prioritize patching for internet-facing systems and critical infrastructure

Patch Information

Microsoft has released security updates addressing CVE-2024-21313 as part of their January 2024 Patch Tuesday release. Organizations should obtain the appropriate patches for their Windows versions from the Microsoft Security Update Guide.

The patches should be applied to all affected Windows systems, prioritizing:

• Internet-facing servers and workstations
• Domain controllers and critical infrastructure
• Systems handling sensitive data
• Remote access servers and VPN endpoints

Workarounds

• Implement network segmentation to limit exposure of vulnerable systems
• Use host-based firewalls to restrict inbound TCP/IP connections to trusted sources only
• Deploy network-level controls to filter potentially malicious traffic
• Consider implementing additional network monitoring until patches can be applied

# Windows Firewall configuration to restrict inbound connections
# Run in elevated PowerShell

# Enable Windows Firewall for all profiles
Set-NetFirewallProfile -Profile Domain,Public,Private -Enabled True

# Block inbound connections by default
Set-NetFirewallProfile -Profile Domain,Public,Private -DefaultInboundAction Block

# Log dropped packets for monitoring
Set-NetFirewallProfile -Profile Domain,Public,Private -LogBlocked True -LogFileName %systemroot%\system32\LogFiles\Firewall\pfirewall.log