Windows Print Spooler Elevation of Privilege Vulnerability (CVE-2022-38028) Security Advisory
Executive & SecOps Summary
SECOPS ASSESSMENTWindows 7, 8.1, 10, 11 and Windows Server 2008, 2012, 2016, 2019, 2022 with active Print Spooler service
Local authenticated attackers can execute arbitrary code with SYSTEM privileges, leading to complete system compromise
Apply the official Microsoft cumulative security updates immediately, or disable the Print Spooler service on non-printing servers
Affected Products & Version Scope
Remediation & Live Workaround Commands
PATCH & WORKAROUND1. Official Patch & Version Upgrade Commands
Applying the official cumulative security updates from Microsoft is the primary remediation path. Use the following PowerShell commands to force-install the latest security updates:
# Install Windows Update module and apply all pending security patches
Install-Module PSWindowsUpdate -Force -Verbose
Get-WindowsUpdate -AcceptAll -Install -AutoReboot2. Temporary Workaround & Hardening Configuration
For critical servers such as Domain Controllers that do not require printing capabilities, disable the Print Spooler service to eliminate the attack vector:
# Stop and disable the Print Spooler service
Stop-Service -Name 'Spooler' -Force
Set-Service -Name 'Spooler' -StartupType Disabled
# Verify the service status
Get-Service -Name 'Spooler'3. Log Audit & IoC Verification Commands
Run the following script to inspect if the Print Spooler service (spoolsv.exe) has spawned any anomalous child processes, which is a common indicator of compromise (IoC):
# Detect anomalous child processes spawned by spoolsv.exe
Get-CimInstance Win32_Process | Where-Object {
$_.ParentProcessId -in (Get-Process -Name spoolsv -ErrorAction SilentlyContinue).Id
} | Select-Object ProcessId, Name, CommandLine, CreationDateBlock Kernel Privilege Escalation & Ransomware Payloads Before You Can Reboot
Protect unpatched Windows, Linux, and macOS workloads against in-memory exploitation and lateral movement with autonomous EDR.
Technical Root Cause & Exploitation Mechanics
1. Vulnerability Overview & Root Cause
CVE-2022-38028 is an elevation of privilege (EoP) vulnerability in the Windows Print Spooler service, which runs by default with SYSTEM privileges. The root cause lies in a logical flaw within the service's handling of file system operations and registry paths. An attacker with local access can exploit this vulnerability to manipulate the file paths or registry keys used by the Spooler service, leading to unauthorized high-privilege execution.
2. Exploitation Mechanics & Attack Scenario
To exploit this vulnerability, an attacker must first gain local execution capabilities on the target system with low-privilege user access. The attacker then crafts a malicious DLL and places it in a directory or creates a symbolic link that the Print Spooler service accesses when loading printer drivers or processing print jobs. When the Spooler service attempts to load the file, it executes the attacker's payload within the SYSTEM security context, granting the attacker full administrative control.
3. Infrastructure & Business Impact
This vulnerability is highly critical and has been added to the CISA Known Exploited Vulnerabilities (KEV) catalog due to active exploitation in the wild. In an enterprise environment, if an attacker compromises a low-privilege domain account, they can leverage this vulnerability to escalate privileges to SYSTEM on Domain Controllers or critical database servers, facilitating lateral movement and ransomware deployment.
Official Vendor Advisories & References
Windows Print Spooler Elevation of Privilege Vulnerability
Frequently Asked SecOps Questions (CVE-2022-38028)
FAQQ1. How critical is CVE-2022-38028 and is it actively exploited in the wild?
CVE-2022-38028 is rated CVSS 7.8 (HIGH) with a 30-day EPSS exploitation probability of 14.9%. It is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, requiring immediate emergency remediation.
Q2. Which vendors and products are affected by CVE-2022-38028?
Primary impacted vendors include microsoft across windows, windows_server. Scope summary: All supported and extended support versions of Windows and Windows Server where the Print Spooler service is running
Q3. What temporary mitigations or workarounds exist for CVE-2022-38028 before patching?
[Mitigation] Apply the official Microsoft cumulative security updates immediately, or disable the Print Spooler service on non-printing servers Follow the CLI remediation commands and interactive SecOps checklist on this page to restrict exposure prior to your maintenance window.
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