Intrusion Prevention

MS.IE.JScript.Engine.CVE-2019-1239.Type.Confusion

Description

This indicates an attack attempt to exploit a Type Confusion Vulnerability in Microsoft Internet Explorer JScript Engine.
The vulnerability is due to an error in the vulnerable application when handling a maliciously crafted webpage. An attacker can exploit this by tricking an unsuspecting user into visiting a malicious webpage and execute arbitrary code within the context of the application.

Affected Products

Internet Explorer 11 on Windows 10 Version 1809 for 32-bit Systems
Internet Explorer 11 on Windows 10 Version 1809 for x64-based Systems
Internet Explorer 11 on Windows 10 Version 1809 for ARM64-based Systems
Internet Explorer 11 on Windows Server 2019

Impact

System Compromise: Remote attackers can gain control of vulnerable systems.

Recommended Actions

Apply the most recent upgrade or patch from the vendor.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1239

CVE References

CVE-2019-1239