CVE-2018-8417
Microsoft JScript Security Feature Bypass Vulnerability
CVE-2018-8417 is fixed in 21 products on 1 platform, first by KB4467691, released November 13, 2018. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.
Urgent
CVSS
4.5
Important
Exploitation
More likely
Vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0202
81st percentile
<p>A security feature bypass vulnerability exists in Microsoft JScript that could allow an attacker to bypass Device Guard.</p> <p>To exploit the vulnerability, an attacker would first have to access the local machine, and run a specially crafted application to create arbitrary COM objects.</p> <p>The update addresses the vulnerability by correcting how Microsoft JScript manages COM object creation.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows 10 Version 1607 for 32-bit Systems | 14393.2608 | KB4467691 | Nov 13, 2018 |
| Windows 10 Version 1607 for x64-based Systems | 14393.2608 | KB4467691 | Nov 13, 2018 |
| Windows 10 Version 1703 for 32-bit Systems | 15063.1446 | KB4467696 | Nov 13, 2018 |
| Windows 10 Version 1703 for x64-based Systems | 15063.1446 | KB4467696 | Nov 13, 2018 |
| Windows 10 Version 1709 for 32-bit Systems | 16299.785 | KB4467686 | Nov 13, 2018 |
| Windows 10 Version 1709 for ARM64-based Systems | 16299.785 | KB4467686 | Nov 13, 2018 |
| Windows 10 Version 1709 for x64-based Systems | 16299.785 | KB4467686 | Nov 13, 2018 |
| Windows 10 Version 1803 for 32-bit Systems | 17134.407 | KB4467702 | Nov 13, 2018 |
| Windows 10 Version 1803 for ARM64-based Systems | 17134.407 | KB4467702 | Nov 13, 2018 |
| Windows 10 Version 1803 for x64-based Systems | 17134.407 | KB4467702 | Nov 13, 2018 |
| Windows 10 Version 1809 for 32-bit Systems | 17763.134 | KB4467708 | Nov 13, 2018 |
| Windows 10 Version 1809 for ARM64-based Systems | 17763.134 | KB4467708 | Nov 13, 2018 |
| Windows 10 Version 1809 for x64-based Systems | 17763.134 | KB4467708 | Nov 13, 2018 |
| Windows 10 for 32-bit Systems | 10240.18036 | KB4467680 | Nov 13, 2018 |
| Windows 10 for x64-based Systems | 10240.18036 | KB4467680 | Nov 13, 2018 |
| Windows Server 2016 | 14393.2608 | KB4467691 | Nov 13, 2018 |
| Windows Server 2016 (Server Core installation) | 14393.2608 | KB4467691 | Nov 13, 2018 |
| Windows Server 2019 | 17763.134 | KB4467708 | Nov 13, 2018 |
| Windows Server 2019 (Server Core installation) | 17763.134 | KB4467708 | Nov 13, 2018 |
| Windows Server, version 1709 (Server Core Installation) | 16299.785 | KB4467686 | Nov 13, 2018 |
| Windows Server, version 1803 (Server Core Installation) | 17134.407 | KB4467702 | Nov 13, 2018 |