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Microsoft has released the April 2025 Patch Tuesday update, addressing 134 vulnerabilities, including one actively exploited zero-day. Among them, 11 vulnerabilities are rated as “Critical”, all of which are Remote Code Execution (RCE) — extremely dangerous if exploited.
Vulnerability breakdown:
- 49 Elevation of Privilege
- 9 Security Feature Bypass
- 31 Remote Code Execution
- 17 Information Disclosure
- 14 Denial of Service
- 3 Spoofing
System administrators are urged to promptly review, assess risks, and apply the patches — especially for Internet-facing services, Domain Controllers, critical infrastructure, and high-privilege user machines.
Read more:
https://lnkd.in/gj5FcEZN
You Should Know: Critical Patch Management Commands and Steps
Windows Patch Management:
1. Check for updates manually:
Get-WindowsUpdate
2. Install all available updates:
Install-WindowsUpdate -AcceptAll -AutoReboot
3. List installed updates (PowerShell):
Get-Hotfix | Sort-Object -Property InstalledOn -Descending
4. Verify specific KB patches:
Get-WindowsUpdate -KBArticleID "KB5035845"
5. Force update via command line (legacy):
wuauclt.exe /updatenow
Linux Security Patching:
1. Update all packages (Debian/Ubuntu):
sudo apt update && sudo apt upgrade -y
2. Check for security-only updates (RHEL/CentOS):
sudo yum update --security
3. List available updates:
sudo apt list --upgradable
4. Automate patching with cron:
0 3 root apt update && apt upgrade -y
Zero-Day Mitigation Checks:
1. Verify system exposure (Windows):
Get-CimInstance -ClassName Win32_Product | Where-Object {$_.Name -like "VulnerableSoftware"}
2. Check running services for exploits:
netstat -tulnp | grep suspicious_port
3. Audit Linux privilege escalation paths:
sudo find / -perm -4000 -type f -exec ls -la {} \;
4. Windows Event Log analysis for exploitation attempts:
Get-WinEvent -FilterHashtable @{LogName='Security'; ID=4688} | Where-Object {$_.Message -like "powershell"}
What Undercode Say:
The April 2025 Patch Tuesday underscores the critical need for proactive vulnerability management. With RCE vulnerabilities dominating the update, organizations must prioritize:
- Immediate patching of internet-facing systems using automated deployment tools like WSUS or Ansible:
ansible all -m win_updates -a "category_names=Security"
Zero-day mitigation through temporary workarounds if patches cannot be immediately applied:
Set-NetFirewallRule -DisplayName "Block Exploit Port" -Enabled True
3. Enhanced logging to detect exploitation attempts:
auditctl -a always,exit -F arch=b64 -S execve -k critical_exec
4. Windows Defender exploit protection configuration:
Set-ProcessMitigation -System -Enable ExportAddressFilterPlus, ImportAddressFilter
5. Linux kernel hardening for unpatched systems:
echo "kernel.exec-shield=1" >> /etc/sysctl.conf
Remember that delaying patches for critical RCE vulnerabilities is equivalent to leaving your doors unlocked in a high-crime area. Implement a robust patch management lifecycle and verify deployments with:
Test-WSUSServerConnection -WsusServerName "your_wsus_server"
Expected Output:
A fully patched and audited environment with verified update deployments across all critical assets, monitored through centralized logging and intrusion detection systems.
References:
Reported By: Phuong Nguyen – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
