CVE-2019-0590
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code on affected systems through memory corruption in Microsoft Edge's scripting engine. Attackers can exploit this by tricking users into visiting malicious websites. All users running vulnerable versions of Microsoft Edge are affected.
💻 Affected Systems
- Microsoft Edge
📦 What is this software?
Chakracore by Microsoft
Edge by Microsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the victim's computer, enabling data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Malicious code execution in browser context leading to credential theft, session hijacking, or installation of malware through drive-by download attacks.
If Mitigated
Limited impact with proper security controls; browser sandboxing may contain the exploit, but privilege escalation remains possible.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious website) but no authentication. Memory corruption vulnerabilities in browsers are frequently exploited in the wild.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Microsoft Edge security updates released in February 2019
Vendor Advisory: https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0590
Restart Required: Yes
Instructions:
1. Open Windows Update settings. 2. Check for updates. 3. Install all available security updates. 4. Restart the computer to complete installation.
🔧 Temporary Workarounds
Disable JavaScript
windowsDisable JavaScript in Microsoft Edge to prevent exploitation of the scripting engine vulnerability
Not applicable - Configure through Edge settings
Use Application Control
windowsImplement application whitelisting to prevent unauthorized code execution
Configure Windows Defender Application Control or third-party solutions
🧯 If You Can't Patch
- Migrate to Chromium-based Microsoft Edge which is not affected by this vulnerability
- Implement network filtering to block access to untrusted websites and use web content filtering solutions
🔍 How to Verify
Check if Vulnerable:
Check Edge version: Open Edge → Settings → About Microsoft Edge. If version is prior to February 2019 updates, system is vulnerable.Check Version:
msedge --version (in command prompt) or check in Edge settingsVerify Fix Applied:
Verify Windows Update history shows February 2019 security updates installed for Microsoft Edge, or confirm Edge version is updated.📡 Detection & Monitoring
Log Indicators:
- Unexpected Edge crashes
- Suspicious process creation from Edge
- Unusual network connections from Edge process
Network Indicators:
- Traffic to known malicious domains
- Unexpected outbound connections following Edge usage
SIEM Query:
Process Creation where (Image contains 'msedge.exe' AND CommandLine contains suspicious patterns) OR (EventID=1000 AND Application Name contains 'MicrosoftEdge.exe')