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Fencer Intel
high 8.8

CVE-2018-4218 json

An issue was discovered in certain Apple products.

published 8y ago modified 4mo ago also EUVD-2018-16004

cvss
8.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
9.1%
EPSS 9.1% chance of exploitation in 30 days, percentile 95%
public exploits
1
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 that triggers an @generatorState use-after-free.

Patch / fix

  • apple safari 11.1.1
  • apple icloud 7.5
  • apple itunes 12.7.5
  • apple iphone_os 11.4
  • apple tvos 11.4
  • apple watchos 4.3.1
  • webkit2gtk Debian 14, Debian 13, Debian 12 2.20.3-1

debian advisories DEBIAN-CVE-2018-4218

  • 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-2018-4218

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

Is CVE-2018-4218 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. First public exploit (EDB-44861)
  2. Published

Exploit prediction

9.06% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-44861 WebKit - Use-After-Free when Resuming Generator dos, 2018-06-08
  • bugs.chromium.org https://bugs.chromium.org/p/project-zero/issues/detail?id=1553 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
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

Classification

Weakness

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.