CVE-2018-8367

Chakra Scripting Engine Memory Corruption Vulnerability

CVE-2018-8367 is fixed in 11 products on 1 platform, first by KB4457131, released September 11, 2018. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent
CVSS
4.2
Critical
Exploitation
More likely
Vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.1494
96th percentile

<p>A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge (HTML-based). The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.</p> <p>In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge (HTML-based) and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability.</p> <p>The security update addresses the vulnerability by modifying how the Chakra scripting engine handles objects in memory.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for 32-bit Systems 14393.2485 KB4457131 Sep 11, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1607 for x64-based Systems 14393.2485 KB4457131 Sep 11, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for 32-bit Systems 15063.1324 KB4457138 Sep 11, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1703 for x64-based Systems 15063.1324 KB4457138 Sep 11, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for 32-bit Systems 16299.665 KB4457142 Sep 11, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1709 for x64-based Systems 16299.665 KB4457142 Sep 11, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for 32-bit Systems 17134.285 KB4457128 Sep 11, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 Version 1803 for x64-based Systems 17134.285 KB4457128 Sep 11, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 for 32-bit Systems 10240.17976 KB4457132 Sep 11, 2018
Microsoft Edge (EdgeHTML-based) on Windows 10 for x64-based Systems 10240.17976 KB4457132 Sep 11, 2018
Microsoft Edge (EdgeHTML-based) on Windows Server 2016 14393.2485 KB4457131 Sep 11, 2018