CVE-2018-0866 Memory corruption in Internet Explorer

High 7.5 Published 15 Feb 2018 Updated 16 Sep 2024

Remote attackers can execute arbitrary code via a memory corruption flaw in the Internet Explorer scripting engine.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2018-0866?

CVE-2018-0866 is a high-severity memory corruption vulnerability in Microsoft Internet Explorer, published on 15 Feb 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Internet Explorer in Microsoft Windows 7 SP1, Windows Server 2008 and R2 SP1, Windows 8.1 and Windows RT 8.1, Windows Server 2012 and R2, Windows 10 Gold, 1511, 1607, 1703, 1709, and Windows Server 2016 allows remote code execution, due to how the scripting engine handles objects in memory, aka "Scripting Engine Memory Corruption Vulnerability". This CVE ID is unique from CVE-2018-0834, CVE-2018-0835, CVE-2018-0836, CVE-2018-0837, CVE-2018-0838, CVE-2018-0840, CVE-2018-0856, CVE-2018-0857, CVE-2018-0858, CVE-2018-0859, CVE-2018-0860, and CVE-2018-0861.

Weakness: CWE-787

Which versions are affected by CVE-2018-0866?

It affects 1 product.

Products include Microsoft Internet Explorer.

How do I fix CVE-2018-0866?

No fix has been published for CVE-2018-0866 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-0866 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-0866 exists.

Public exploit code: 1 Exploit-DB entry.

All Microsoft Internet Explorer vulnerabilities

Sources

Also known as GHSA-6cff-v7rr-93p7.