CVE-2020-1180
📋 TL;DR
This is a remote code execution vulnerability in the ChakraCore JavaScript engine that allows attackers to execute arbitrary code with the privileges of the current user. It affects systems running applications that use ChakraCore, particularly Microsoft Edge (legacy version) and applications embedding ChakraCore. Successful exploitation could lead to complete system compromise if the user has administrative rights.
💻 Affected Systems
- Microsoft Edge (legacy)
- Applications using ChakraCore
📦 What is this software?
Chakracore by Microsoft
Edge by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with administrative privileges, allowing installation of malware, data theft/modification, and creation of new accounts.
Likely Case
Arbitrary code execution in the context of the current user, potentially leading to lateral movement within a network or privilege escalation.
If Mitigated
Limited impact if users run with minimal privileges, applications are sandboxed, or network segmentation prevents lateral movement.
🎯 Exploit Status
Exploitation requires user interaction (such as visiting a malicious website) and involves memory corruption techniques. No publicly available exploit code was identified at disclosure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Security update released by Microsoft (specific version depends on OS/build)
Vendor Advisory: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1180
Restart Required: Yes
Instructions:
1. Apply the latest Windows security updates via Windows Update. 2. For applications using ChakraCore, update to the patched version. 3. Restart affected systems after patching.
🔧 Temporary Workarounds
Disable JavaScript in Edge (legacy)
windowsPrevents execution of malicious JavaScript that could trigger the vulnerability
Not applicable - configure via browser settings
Use alternative browser
allSwitch to Microsoft Edge (Chromium-based) or other modern browsers not affected by this vulnerability
🧯 If You Can't Patch
- Run applications with minimal user privileges (non-admin accounts)
- Implement application sandboxing or isolation where possible
🔍 How to Verify
Check if Vulnerable:
Check if using legacy Microsoft Edge or applications with ChakraCore, and verify they haven't received the security update.Check Version:
For Edge: edge://version/ ; For Windows: systeminfo | findstr /B /C:"OS Name" /C:"OS Version"Verify Fix Applied:
Verify Windows Update history shows the relevant security update installed, or check application/ChakraCore version against patched versions.📡 Detection & Monitoring
Log Indicators:
- Unexpected process crashes in Edge/ChakraCore applications
- Suspicious JavaScript execution patterns
Network Indicators:
- Connections to known malicious domains serving exploit code
SIEM Query:
Process creation events from edge.exe or chakra.dll with unusual command-line arguments or parent processes