CVE-2018-8461

Internet Explorer Memory Corruption Vulnerability

CVE-2018-8461 is fixed in 4 products on 1 platform, first by KB4457142, released September 11, 2018. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent
CVSS
7.5
Critical
Exploitation
More likely
Vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.1290
96th percentile

<p>A remote code execution vulnerability exists when Internet Explorer improperly accesses objects in memory. 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, the attacker 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>An attacker could host a specially crafted website designed to exploit the vulnerability through Internet Explorer and then convince a user to view the website. The attacker could also take advantage of compromised websites, or websites that accept or host user-provided content or advertisements, by adding specially crafted content that could exploit the vulnerability. However, in all cases an attacker would have no way to force a user to view the attacker-controlled content. Instead, an attacker would have to convince a user to take action, typically by an enticement in an email or instant message, or by getting the user to open an attachment sent through email.</p> <p>The security update addresses the vulnerability by modifying how Internet Explorer handles objects in memory.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Internet Explorer 11 on Windows 10 Version 1709 for 32-bit Systems 16299.665 KB4457142 Sep 11, 2018
Internet Explorer 11 on Windows 10 Version 1709 for x64-based Systems 16299.665 KB4457142 Sep 11, 2018
Internet Explorer 11 on Windows 10 Version 1803 for 32-bit Systems 17134.285 KB4457128 Sep 11, 2018
Internet Explorer 11 on Windows 10 Version 1803 for x64-based Systems 17134.285 KB4457128 Sep 11, 2018