CVE-2020-0832
📋 TL;DR
This is a remote code execution vulnerability in Internet Explorer's scripting engine that allows attackers to execute arbitrary code on affected systems. It affects users running vulnerable versions of Internet Explorer on Windows systems. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- Internet Explorer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with administrative privileges, data theft, ransomware deployment, and persistent backdoor installation.
Likely Case
Malware installation, credential theft, and lateral movement within the network.
If Mitigated
Limited impact due to security controls like application whitelisting, network segmentation, and least privilege.
🎯 Exploit Status
Exploitation requires user interaction (visiting a malicious website). No public proof-of-concept was available at disclosure time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: March 2020 Security Updates
Vendor Advisory: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0832
Restart Required: Yes
Instructions:
1. Apply March 2020 Windows security updates via Windows Update. 2. For enterprise environments, deploy updates through WSUS or SCCM. 3. Verify update installation and restart systems as required.
🔧 Temporary Workarounds
Disable Internet Explorer scripting
windowsConfigure Internet Explorer to disable scripting via security zones
Set Internet Options > Security > Custom Level > Scripting > Active scripting = Disable
Use Enhanced Security Configuration
windowsEnable Internet Explorer Enhanced Security Configuration for servers
Server Manager > Local Server > IE Enhanced Security Configuration = On
🧯 If You Can't Patch
- Disable Internet Explorer entirely and use alternative browsers
- Implement network segmentation to isolate vulnerable systems
🔍 How to Verify
Check if Vulnerable:
Check Internet Explorer version and compare with patched versions in Microsoft advisoryCheck Version:
Open Internet Explorer > Help > About Internet ExplorerVerify Fix Applied:
Verify March 2020 security updates are installed via Windows Update history or systeminfo command📡 Detection & Monitoring
Log Indicators:
- Internet Explorer crash logs
- Unexpected process creation from iexplore.exe
- Scripting engine errors in Windows Event Logs
Network Indicators:
- Unusual outbound connections from systems running Internet Explorer
- Traffic to known malicious domains
SIEM Query:
Process Creation where Parent Process contains 'iexplore.exe' AND Command Line contains suspicious patterns