CVE-2018-4218
An issue was discovered in certain Apple products. iOS before 11.4 is affected. Safari before 11...
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2018-4218- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - CVSS 2.0
- 6.8 Medium
AV:N/AC:M/Au:N/C:P/I:P/A:P - Weakness
- CWE-416
- Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2018-4218- Updated
- 2026-11-02
EUVDEUVD-2018-16004 No score
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.
- Record
EUVD-2018-16004- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v4g5-82wj-3j9w
An issue was discovered in certain Apple products. iOS before 11.4 is affected. Safari before 11...
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.
- Record
GHSA-v4g5-82wj-3j9w- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Weakness
- CWE-416
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2018-4218- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2018-4218
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.
- Record
DEBIAN-CVE-2018-4218- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
Show 5 moreShow less
OSVUBUNTU-CVE-2018-4218
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.
- Record
UBUNTU-CVE-2018-4218- CVSS 3.0
- 8.8 High
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - Updated
- 2026-11-02
OSVMGASA-2018-0302 No score
Updated webkit2 packages fix security vulnerability
The webkit2 package has been updated to version 2.20.3, fixing several security issues and other bugs.
- Record
MGASA-2018-0302- Updated
- 2026-11-02
OSVSUSE-SU-2018:2075-1 No score
Security update for webkit2gtk3
This update for webkit2gtk3 to version 2.20.3 fixes the following issues:
These security issues were fixed:
- CVE-2018-4190: An unspecified issue allowed remote attackers to obtain sensitive credential information that is transmitted during a CSS mask-image fetch (bsc#1097693).
- CVE-2018-4199: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (buffer overflow and application crash) via a crafted web site (bsc#1097693)
- CVE-2018-4218: An unspecified issue allowed 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 (bsc#1097693)
- CVE-2018-4222: An unspecified issue allowed remote attackers to execute arbitrary code via a crafted web site that leverages a getWasmBufferFromValue out-of-bounds read during WebAssembly compilation (bsc#1097693)
- CVE-2018-4232: An unspecified issue allowed remote attackers to overwrite cookies via a crafted web site (bsc#1097693)
- CVE-2018-4233: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1097693)
- CVE-2018-11646: webkitFaviconDatabaseSetIconForPageURL and webkitFaviconDatabaseSetIconURLForPageURL mishandle an unset pageURL, leading to an application crash (bsc#1095611).
These non-security issues were fixed:
- Disable Gigacage if mmap fails to allocate in Linux.
- Add user agent quirk for paypal website.
- Fix a network process crash when trying to get cookies of about:blank page.
- Fix UI process crash when closing the window under Wayland.
- Fix several crashes and rendering issues.
- Record
SUSE-SU-2018:2075-1- Updated
- 2026-11-02
OSVSUSE-SU-2018:3387-1 No score
Security update for webkit2gtk3
This update for webkit2gtk3 to version 2.20.3 fixes the issues:
The following security vulnerabilities were addressed:
- CVE-2018-12911: Fixed an off-by-one error in xdg_mime_get_simple_globs (boo#1101999)
- CVE-2017-13884: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1075775).
- CVE-2017-13885: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1075775).
- CVE-2017-7153: An unspecified issue allowed remote attackers to spoof user-interface information (about whether the entire content is derived from a valid TLS session) via a crafted web site that sends a 401 Unauthorized redirect (bsc#1077535).
- CVE-2017-7160: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1075775).
- CVE-2017-7161: An unspecified issue allowed remote attackers to execute arbitrary code via special characters that trigger command injection (bsc#1075775, bsc#1077535).
- CVE-2017-7165: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1075775).
- CVE-2018-4088: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1075775).
- CVE-2018-4096: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1075775).
- CVE-2018-4200: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site that triggers a WebCore::jsElementScrollHeightGetter use-after-free (bsc#1092280).
- CVE-2018-4204: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1092279).
- CVE-2018-4101: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1088182).
- CVE-2018-4113: An issue in the JavaScriptCore function in the 'WebKit' component allowed attackers to trigger an assertion failure by leveraging improper array indexing (bsc#1088182)
- CVE-2018-4114: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1088182)
- CVE-2018-4117: An unspecified issue allowed remote attackers to bypass the Same Origin Policy and obtain sensitive information via a crafted web site (bsc#1088182, bsc#1102530).
- CVE-2018-4118: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1088182)
- CVE-2018-4119: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1088182)
- CVE-2018-4120: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1088182).
- CVE-2018-4121: An unspecified issue allowed remote attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted web site (bsc#1092278).
- CVE-2018-4122: An unspecified issue allowed remote attackers to execute arbitrary…
- Record
SUSE-SU-2018:3387-1- Updated
- 2026-11-02
OSVUSN-3687-1 No score
webkit2gtk vulnerabilities
A large number of security issues were discovered in the WebKitGTK+ Web and JavaScript engines. If a user were tricked into viewing a malicious website, a remote attacker could exploit a variety of issues related to web browser security, including cross-site scripting attacks, denial of service attacks, and arbitrary code execution.
- Record
USN-3687-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
webkit2gtkDebian:12 |
before 2.20.3-1 | 2.20.3-1 |
webkit2gtkDebian:13 |
before 2.20.3-1 | 2.20.3-1 |
webkit2gtkDebian:14 |
before 2.20.3-1 | 2.20.3-1 |
webkit2Mageia:6 From an advisory covering 8 CVEs |
before 2.20.3-1.mga6 | 2.20.3-1.mga6 |
webkit2gtk3SUSE:Linux Enterprise Module for Basesystem 15 From an advisory covering 7 CVEs |
before 2.20.3-3.3.1 | 2.20.3-3.3.1 |
webkit2gtk3SUSE:Linux Enterprise Module for Desktop Applications 15 From an advisory covering 7 CVEs |
before 2.20.3-3.3.1 | 2.20.3-3.3.1 |
webkit2gtk3SUSE:Linux Enterprise Desktop 12 SP3 From an advisory covering 40 CVEs |
before 2.20.3-2.23.8 | 2.20.3-2.23.8 |
webkit2gtk3SUSE:Linux Enterprise Software Development Kit 12 SP3 From an advisory covering 40 CVEs |
before 2.20.3-2.23.8 | 2.20.3-2.23.8 |
webkit2gtk3SUSE:Linux Enterprise Server 12 SP3 From an advisory covering 40 CVEs |
before 2.20.3-2.23.8 | 2.20.3-2.23.8 |
webkit2gtk3SUSE:Linux Enterprise Server for SAP Applications 12 SP3 From an advisory covering 40 CVEs |
before 2.20.3-2.23.8 | 2.20.3-2.23.8 |
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| Package | Affected | Fixed |
|---|---|---|
webkit2gtk3SUSE:Linux Enterprise Workstation Extension 12 SP3 From an advisory covering 40 CVEs |
before 2.20.3-2.23.8 | 2.20.3-2.23.8 |
webkit2gtkUbuntu:16.04:LTS |
before 2.20.3-0ubuntu0.16.04.1, plus listed versions 2.8.5+dfsg1-32.10.3+dfsg1-12.10.4+dfsg1-12.10.5-12.10.6-1 Show 19 moreShow less2.10.6-1ubuntu12.10.8-1ubuntu12.10.9-1ubuntu12.12.5-0ubuntu0.16.04.12.14.2-0ubuntu0.16.04.12.14.3-0ubuntu0.16.04.12.14.5-0ubuntu0.16.04.12.16.1-0ubuntu0.16.04.12.16.1-0ubuntu0.16.04.22.16.2-0ubuntu0.16.04.12.16.3-0ubuntu0.16.04.12.16.6-0ubuntu0.16.04.12.18.0-0ubuntu0.16.04.22.18.3-0ubuntu0.16.04.12.18.4-0ubuntu0.16.04.12.18.5-0ubuntu0.16.04.12.18.6-0ubuntu0.16.04.12.20.1-0ubuntu0.16.04.12.20.2-0ubuntu0.16.04.1 |
2.20.3-0ubuntu0.16.04.1 |
qtwebkit-opensource-srcUbuntu:16.04:LTS |
All versions, plus listed versions 5.4.2+dfsg-1ubuntu2.15.5.1+dfsg-2ubuntu1 |
None known |
qtwebkit-sourceUbuntu:16.04:LTS |
All versions, plus listed versions 2.3.2-0ubuntu102.3.2-0ubuntu11 |
None known |
webkitgtkUbuntu:16.04:LTS |
All versions, plus listed versions 2.4.9-2ubuntu22.4.10-0ubuntu12.4.11-0ubuntu0.1 |
None known |
webkit2gtkUbuntu:18.04:LTS |
before 2.20.3-0ubuntu0.18.04.1, plus listed versions 2.18.0-22.18.0-2build12.18.2-12.18.3-12.18.4-1 Show 8 moreShow less2.18.6-12.19.91-1ubuntu12.19.92-12.20.0-12.20.0-22.20.0-2ubuntu12.20.1-12.20.2-0ubuntu0.18.04.1 |
2.20.3-0ubuntu0.18.04.1 |
qtwebkit-opensource-srcUbuntu:18.04:LTS |
All versions, plus listed versions 5.9.1+dfsg-5ubuntu15.9.1+dfsg-5ubuntu35.212.0~alpha2-5build25.212.0~alpha2-5build45.212.0~alpha2-75.212.0~alpha2-7build25.212.0~alpha2-7ubuntu1 |
None known |
qtwebkit-sourceUbuntu:18.04:LTS |
All versions, plus listed versions 2.3.2-0ubuntu13 |
None known |
webkitgtkUbuntu:18.04:LTS |
All versions, plus listed versions 2.4.11-32.4.11-3ubuntu22.4.11-3ubuntu3 |
None known |
qtwebkit-opensource-srcUbuntu:20.04:LTS |
All versions, plus listed versions 5.212.0~alpha3-35.212.0~alpha3-55.212.0~alpha3-65.212.0~alpha3-75.212.0~alpha4-15.212.0~alpha4-1ubuntu15.212.0~alpha4-1ubuntu25.212.0~alpha4-1ubuntu2.1 |
None known |
qtwebkit-opensource-srcUbuntu:22.04:LTS |
All versions, plus listed versions 5.212.0~alpha4-125.212.0~alpha4-135.212.0~alpha4-145.212.0~alpha4-14build15.212.0~alpha4-14ubuntu25.212.0~alpha4-15ubuntu1 |
None known |
qtwebkit-opensource-srcUbuntu:24.04:LTS |
All versions, plus listed versions 5.212.0~alpha4-335.212.0~alpha4-33build15.212.0~alpha4-345.212.0~alpha4-34ubuntu35.212.0~alpha4-34ubuntu45.212.0~alpha4-36 |
None known |
webkit2gtkUbuntu:16.04:LTS From an advisory covering 7 CVEs |
before 2.20.3-0ubuntu0.16.04.1, plus listed versions 2.8.5+dfsg1-32.10.3+dfsg1-12.10.4+dfsg1-12.10.5-12.10.6-1 Show 19 moreShow less2.10.6-1ubuntu12.10.8-1ubuntu12.10.9-1ubuntu12.12.5-0ubuntu0.16.04.12.14.2-0ubuntu0.16.04.12.14.3-0ubuntu0.16.04.12.14.5-0ubuntu0.16.04.12.16.1-0ubuntu0.16.04.12.16.1-0ubuntu0.16.04.22.16.2-0ubuntu0.16.04.12.16.3-0ubuntu0.16.04.12.16.6-0ubuntu0.16.04.12.18.0-0ubuntu0.16.04.22.18.3-0ubuntu0.16.04.12.18.4-0ubuntu0.16.04.12.18.5-0ubuntu0.16.04.12.18.6-0ubuntu0.16.04.12.20.1-0ubuntu0.16.04.12.20.2-0ubuntu0.16.04.1 |
2.20.3-0ubuntu0.16.04.1 |
webkit2gtkUbuntu:18.04:LTS From an advisory covering 7 CVEs |
before 2.20.3-0ubuntu0.18.04.1, plus listed versions 2.18.0-22.18.0-2build12.18.2-12.18.3-12.18.4-1 Show 8 moreShow less2.18.6-12.19.91-1ubuntu12.19.92-12.20.0-12.20.0-22.20.0-2ubuntu12.20.1-12.20.2-0ubuntu0.18.04.1 |
2.20.3-0ubuntu0.18.04.1 |
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | WebKit - Use-After-Free when Resuming Generator | 2018-06-08 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-4218 is a high vulnerability (CVSS 8.8) in Apple Icloud, published June 8, 2018. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 9.05%, the 95th percentile. Fixed in webkit2gtk 2.20.3-1.
References
support.apple.com/HT208850
exploit-db.com/exploits/44861
security.gentoo.org/glsa/201808-04
Show 78 moreShow less
securitytracker.com/id/1041029
usn.ubuntu.com/3687-1
bugs.chromium.org/p/project-zero/issues/detail?id=1553
nvd.nist.gov/vuln/detail/CVE-2018-4218
github.com/advisories/GHSA-v4g5-82wj-3j9w
security-tracker.debian.org/tracker/CVE-2018-4218
advisories.mageia.org/MGASA-2018-0302.html
bugs.mageia.org/show_bug.cgi?id=23189
webkitgtk.org/security/WSA-2018-0005.html
suse.com/support/update/announcement/2018/suse-su-20182075-1
bugzilla.suse.com/1095611
ubuntu.com/security/CVE-2018-4218
cve.org/CVERecord?id=CVE-2018-4218
Left out here: the rest of 1 source description. The JSON record has them.