CVE-2018-4233 in the critical feed json
An issue was discovered in certain Apple products.
published 2018-06-08 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16019
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 53.8%
- EPSS 53.8% chance of exploitation in 30 days, percentile 99%
- public exploits
- 3
- Metasploit, Exploit-DB
Summary
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.
Patch / fix
- apple safari 11.1.1
- apple iphone_os 11.4
- apple tvos 11.4
- apple watchos 4.3.1
- apple icloud 7.5
- apple itunes 12.7.5
- webkit2gtk Debian 14, Debian 13, Debian 12 2.20.3-1
debian advisories DEBIAN-CVE-2018-4233
- webkit2gtk Ubuntu 16.04 LTS 2.20.3-0ubuntu0.16.04.1
- webkit2gtk Ubuntu 18.04 LTS 2.20.3-0ubuntu0.18.04.1
ubuntu advisories UBUNTU-CVE-2018-4233
Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0
- webkit2gtk3 SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 +2 more 2.20.3-2.23.8
- webkit2gtk3 SLE Module for Desktop Applications 15, SLE Module for Basesystem 15 2.20.3-3.3.1
suse advisories SUSE-SU-2018:3387-1SUSE-SU-2018:2075-1
Timeline
- First public exploit (Metasploit exploit/apple_ios/browser/webkit_createthis)
- Published
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
53.82% chance of exploitation in the next 30 days, higher than 99% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- Metasploit exploit/apple_ios/browser/webkit_createthis Safari Webkit Proxy Object Type Confusion metasploit exploit, manual rank, 2018-03-15
- Metasploit exploit/osx/browser/safari_proxy_object_type_confusion Safari Proxy Object Type Confusion metasploit exploit, manual rank, 2018-03-15
- EDB-45998 Safari - Proxy Object Type Confusion (Metasploit) remote, 2018-12-14
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.0 | 8.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- apple safari
- apple iphone_os
- apple tvos
- apple watchos
- apple icloud
- apple itunes
- canonical ubuntu_linux
Classification
- Weakness
-
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
-
exploit-db.com
/exploits/45998/
exploit, third-party-advisory, vdb-entry
-
security.gentoo.org
/glsa/201808-04
vendor-advisory, third-party-advisory
-
usn.ubuntu.com
/3687-1/
vendor-advisory, third-party-advisory
-
support.apple.com
/HT208850
vendor-advisory
-
support.apple.com
/HT208853
vendor-advisory
-
support.apple.com
/HT208851
vendor-advisory
-
support.apple.com
/HT208854
vendor-advisory
-
support.apple.com
/HT208848
vendor-advisory
-
support.apple.com
/HT208852
vendor-advisory
-
securitytracker.com
/id/1041029
vdb-entry, third-party-advisory
- packetstormsecurity.com /files/153148/Safari-Webkit-Proxy-Object-Type-Confusion.html
Sources
- CVE List CVE-2018-4233
- NVD CVE-2018-4233
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.