CVE-2018-8389Internet Explorer Out-of-Bounds Write
A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10.
Published Aug 15, 2018 · Updated Nov 21, 2024
Key Facts
Patch immediately- CVE-2018-8389 is a high-severity vulnerability (CVSS 7.5 v3) affecting Internet Explorer (Microsoft), Internet Explorer 10, Internet Explorer 11 and 1 more product.
- It is exploited in the wild, listed in Industry KEV feed since Oct 15, 2020. No public exploit code is known.
- EPSS estimates a 30% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v3
7.5
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
30%
Higher than 98.2% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
49/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Oct 15, 2020
792 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
3
Reports of active use
Advisories And Exploit References
Description
A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10. This CVE ID is unique from CVE-2018-8353, CVE-2018-8355, CVE-2018-8359, CVE-2018-8371, CVE-2018-8372, CVE-2018-8373, CVE-2018-8385, CVE-2018-8390.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Oct 15, 2020 | n/a | Not reported |
Affected Products
6 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Internet ExplorerMicrosoft | 10, 11, 9 | n/a |
| Internet Explorer 10 | >= Windows Server 2012 | n/a |
| Internet Explorer 11 | >= Windows 10 for 32-bit Systems | n/a |
| Internet Explorer 9 | >= Windows Server 2008 for 32-bit Systems Service Pack 2 | n/a |
Timeline
Publicly disclosed
Aug 15, 2018
Added to Industry KEV feed
Oct 15, 2020
Last updated
Nov 21, 2024
Weakness Type
- CWE-787 Out-of-bounds Write
References
- advisory105036
- advisory1041483
- patchportal.msrc.microsoft.com · CVE-2018-8389
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
A remote code execution vulnerability exists in the way that the scripting engine handles objects in memory in Internet Explorer, aka "Scripting Engine Memory Corruption Vulnerability." This affects Internet Explorer 9, Internet Explorer 11, Internet Explorer 10.
Affected: Internet Explorer (Microsoft) versions 10, 11, 9; Internet Explorer 10 versions >= Windows Server 2012; Internet Explorer 11 versions >= Windows 10 for 32-bit Systems, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Oct 15, 2020.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2018-8389 On Your Attack Surface?
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