CVE-2018-4233
HighExploitedPublic exploitiOS before 11.4 is affected.
Published Jun 8, 2018 · Updated Aug 4, 2026 · Also known as DEBIAN-CVE-2018-4233, UBUNTU-CVE-2018-4233
Key Facts
Patch immediately- CVE-2018-4233 is a high-severity vulnerability (CVSS 8.8 v3.1) affecting Icloud (Apple), Itunes (Apple), Safari (Apple) and 21 more products.
- It is exploited in the wild, listed in Industry KEV feed since May 29, 2024. Public exploit code is available.
- EPSS estimates a 54% probability of exploitation in the next 30 days.
- Fixed versions are available, including Icloud 7.5, Iphone OS 11.4, Itunes 12.7.5.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
54%
Higher than 98.9% of all scored CVEs
Exploited in the wild
Yes
1 catalog listing
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2018-4233 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
An issue was discovered in certain Apple products. iOS before 11.4 is affected. Safari before 11.1.1 is affected. iCloud before 7.5 on Windows is affected. iTunes before 12.7.5 on Windows is affected. tvOS before 11.4 is affected. watchOS before 4.3.1 is affected. The issue involves the "WebKit" component. It allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | May 29, 2024 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
91 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| IcloudApple | See advisory | 7.5 |
| ItunesApple | See advisory | 12.7.5 |
| SafariApple | See advisory | 11.1.1 |
| Iphone OSApple | See advisory | 11.4 |
| TvosApple | See advisory | 11.4 |
Patched Releases
Icloud
7.5
Iphone OS
11.4
Itunes
12.7.5
Safari
11.1.1
Tvos
11.4
Watchos
4.3.1
libjavascriptcoregtk-4_0-18
2.20.3-11.1, 2.20.3-2.23.8, 2.20.3-3.3.1, 2.20.3-lp150.2.3.1
libjavascriptcoregtk-4_0-18-32bit
2.20.3-11.1, 2.20.3-lp150.2.3.1
libwebkit2gtk-4_0-37
2.20.3-11.1, 2.20.3-2.23.8, 2.20.3-3.3.1, 2.20.3-lp150.2.3.1
libwebkit2gtk-4_0-37-32bit
2.20.3-11.1, 2.20.3-lp150.2.3.1
libwebkit2gtk3-lang
2.20.3-11.1, 2.20.3-2.23.8, 2.20.3-3.3.1, 2.20.3-lp150.2.3.1
typelib-1_0-JavaScriptCore-4_0
2.20.3-11.1, 2.20.3-2.23.8, 2.20.3-3.3.1, 2.20.3-lp150.2.3.1
typelib-1_0-WebKit2-4_0
2.20.3-11.1, 2.20.3-2.23.8, 2.20.3-3.3.1, 2.20.3-lp150.2.3.1
typelib-1_0-WebKit2WebExtension-4_0
2.20.3-11.1, 2.20.3-2.23.8, 2.20.3-3.3.1, 2.20.3-lp150.2.3.1
webkit-jsc-4
2.20.3-11.1, 2.20.3-lp150.2.3.1
webkit2gtk
2.20.3-0ubuntu0.16.04.1, 2.20.3-0ubuntu0.18.04.1, 2.20.3-1
webkit2gtk-4_0-injected-bundles
2.20.3-11.1, 2.20.3-2.23.8, 2.20.3-3.3.1, 2.20.3-lp150.2.3.1
webkit2gtk3
2.20.3-11.1, 2.20.3-2.23.8, 2.20.3-3.3.1, 2.20.3-lp150.2.3.1
webkit2gtk3-devel
2.20.3-11.1, 2.20.3-2.23.8, 2.20.3-3.3.1, 2.20.3-lp150.2.3.1
webkit2gtk3-plugin-process-gtk2
2.20.3-11.1, 2.20.3-lp150.2.3.1
Timeline
Publicly disclosed
Jun 8, 2018
Added to Industry KEV feed
May 29, 2024
Last updated
Aug 4, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
- advisoryhttps://bugzilla.suse.com/1075775
- advisoryhttps://bugzilla.suse.com/1077535
- advisoryhttps://bugzilla.suse.com/1079512
- advisoryhttps://bugzilla.suse.com/1088182
- advisoryhttps://bugzilla.suse.com/1088932
FAQ
Common Questions.
An issue was discovered in certain Apple products.
Affected: Icloud (Apple); Itunes (Apple); Safari (Apple), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since May 29, 2024.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Icloud 7.5, Iphone OS 11.4, Itunes 12.7.5.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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