CVE-2022-32230 : What You Need to Know
Learn about CVE-2022-32230 impacting Windows SMBv3. Find out the vulnerability details, impacted systems, exploitation method, and mitigation steps to protect your systems.
Microsoft Windows SMBv3 is affected by a null pointer dereference vulnerability before the April 2022 patch. An attacker could trigger a Blue Screen of Death in the Windows kernel by sending a crafted FileNormalizedNameInformation SMBv3 request over a named pipe. Authentication is usually required for this attack, except on Windows Domain Controllers. The victim server typically reboots after the crash.
Understanding CVE-2022-32230
This CVE impacts Microsoft Windows systems running SMBv3 protocol versions prior to the April 2022 patch.
What is CVE-2022-32230?
The CVE-2022-32230 vulnerability in Windows SMBv3 allows an attacker to cause a Blue Screen of Death by exploiting a null pointer dereference issue.
The Impact of CVE-2022-32230
The vulnerability can lead to a denial-of-service condition on affected systems, affecting system availability.
Technical Details of CVE-2022-32230
Vulnerability Description
The vulnerability arises from a null pointer dereference when processing specially crafted SMBv3 requests.
Affected Systems and Versions
- Windows 10 Version 20H2: Versions prior to 19042.1706
- Windows Server Version 20H2: Versions prior to 19042.1706
- Windows 10 Version 21H1: Versions prior to 19042.1706
- Windows 10 Version 21H2: Versions prior to 19042.1706
Exploitation Mechanism
By sending a malformed FileNormalizedNameInformation SMBv3 request over a named pipe, an attacker can exploit this vulnerability.
Mitigation and Prevention
Immediate Steps to Take
Ensure systems are updated with the April 2022 patch Tuesday set from Microsoft.
Long-Term Security Practices
Regularly apply security patches and updates to prevent exploitation of known vulnerabilities.
Patching and Updates
Refer to official Microsoft sources for patch details and ensure timely installation for mitigation.