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Fencer Intel
high 8.8

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

  1. First public exploit (Metasploit exploit/apple_ios/browser/webkit_createthis)
  2. 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, 2026-11-09).

Exploits and checks

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

Sources

Fencer Intel 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.