CVE-2018-4318: Use After Free
First published: Wed Sep 12 2018(Updated: )
A use after free issue was addressed with improved memory management. This issue affected versions prior to iOS 12, tvOS 12, Safari 12, iTunes 12.9 for Windows, iCloud for Windows 7.7.
Credit: Ivan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project ZeroIvan Fratric Google Project Zero product-security@apple.com product-security@apple.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Apple iCloud for Windows | <7.7 | 7.7 |
| Apple iTunes for Windows | <12.9 | 12.9 |
| Apple Safari | <12 | 12 |
| Apple tvOS | <12 | 12 |
| Apple iOS | <12 | 12 |
| Apple Safari | <12 | |
| Apple iPhone OS | <12.0 | |
| Apple tvOS | <12 | |
| All of | ||
| Any of | ||
| Apple iCloud | <7.7 | |
| Apple iTunes | <12.9 | |
| Microsoft Windows | ||
| Apple iCloud | <7.7 | |
| Apple iTunes | <12.9 | |
| Microsoft Windows | ||
| ubuntu/webkit2gtk | <2.22.2-0ubuntu0.18.04.1 | 2.22.2-0ubuntu0.18.04.1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.2-1ubuntu1 | 2.22.2-1ubuntu1 |
| ubuntu/webkit2gtk | <2.22.0 | 2.22.0 |
| debian/webkit2gtk | 2.44.2-1~deb11u1 2.44.2-1~deb12u1 2.44.2-1 |
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Reference Links
- https://support.apple.com/en-us/HT209141 (Advisory)
- https://support.apple.com/en-us/HT209140 (Advisory)
- https://support.apple.com/en-us/HT209109 (Advisory)
- https://support.apple.com/kb/HT209106
- https://support.apple.com/kb/HT209107
- https://support.apple.com/kb/HT209109
- https://support.apple.com/kb/HT209140
- https://support.apple.com/kb/HT209141
- https://launchpad.net/bugs/cve/CVE-2018-4318
- https://support.apple.com/en-us/HT209107 (Advisory)
- https://support.apple.com/en-us/HT209106 (Advisory)
- https://webkitgtk.org/security/WSA-2018-0007.html
- https://security-tracker.debian.org/tracker/CVE-2018-4318
- https://www.openwall.com/lists/oss-security/2018/09/29/1
- https://ubuntu.com/security/notices/USN-3781-1
- https://www.cve.org/CVERecord?id=CVE-2018-4318
- https://nvd.nist.gov/vuln/detail/CVE-2018-4318
- https://ubuntu.com/security/CVE-2018-4318
Parent vulnerabilities
(Appears in the following advisories)
Peer vulnerabilities
(Found alongside the following vulnerabilities)
- CVE-2018-4126
- CVE-2018-4414
- CVE-2018-4412
- CVE-2018-4347
- CVE-2018-4191
- CVE-2018-4311
- CVE-2018-4316
- CVE-2018-4299
- CVE-2018-4323
- CVE-2018-4328
- CVE-2018-4358
- CVE-2018-4359
- CVE-2018-4360
- CVE-2018-4319
- CVE-2018-4309
- CVE-2018-4197
- CVE-2018-4306
- CVE-2018-4312
- CVE-2018-4314
- CVE-2018-4315
- CVE-2018-4317
- CVE-2018-4318
- CVE-2018-4345
- CVE-2018-4361
- CVE-2018-4474
- CVE-2018-4307
- CVE-2018-4329
- CVE-2018-4195
- CVE-2018-4321
- CVE-2018-5383
- CVE-2018-4433
- CVE-2018-4426
- CVE-2018-4331
- CVE-2018-4332
- CVE-2018-4343
- CVE-2018-4408
- CVE-2018-4341
- CVE-2018-4354
- CVE-2018-4383
- CVE-2018-4401
- CVE-2018-4305
- CVE-2018-4399
- CVE-2018-4407
- CVE-2018-4363
- CVE-2018-4336
- CVE-2018-4337
- CVE-2018-4340
- CVE-2018-4344
- CVE-2018-4425
- CVE-2018-4313
- CVE-2016-1777
- CVE-2018-4395
- CVE-2018-4203
- CVE-2018-4304
- CVE-2018-4322
- CVE-2018-4356
- CVE-2018-4333
- CVE-2018-4355
- CVE-2018-4335
- CVE-2018-4326
- CVE-2018-4310
- CVE-2018-4352
- CVE-2018-4362
- CVE-2018-4325
Frequently Asked Questions
What is CVE-2018-4318?
CVE-2018-4318 is a use after free vulnerability in WebKit, affecting versions prior to iOS 12, tvOS 12, Safari 12, iTunes 12.9 for Windows, and iCloud for Windows 7.7.
How can this vulnerability be exploited?
This vulnerability can be exploited by an attacker to execute arbitrary code or cause a denial of service.
What is the severity of CVE-2018-4318?
CVE-2018-4318 has a severity score of 8.8 (high).
How can I fix CVE-2018-4318?
To fix CVE-2018-4318, update to iOS 12 (or later), tvOS 12 (or later), Safari 12 (or later), iTunes 12.9 for Windows (or later), or iCloud for Windows 7.7 (or later).
Where can I find more information about CVE-2018-4318?
You can find more information about CVE-2018-4318 at the following references: [Link 1](https://support.apple.com/kb/HT209106), [Link 2](https://support.apple.com/kb/HT209107), [Link 3](https://support.apple.com/kb/HT209109).
- collector/apple-support
- alias/CVE-2018-4306
- alias/CVE-2018-4312
- alias/CVE-2018-4314
- alias/CVE-2018-4315
- alias/CVE-2018-4317
- alias/CVE-2018-4318
- alias/CVE-2018-4197
- agent/type
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/software-canonical-lookup-request
- agent/last-modified-date
- agent/severity
- agent/weakness
- agent/author
- agent/description
- agent/event
- collector/nvd-cve
- source/NVD
- agent/software-canonical-lookup
- collector/nvd-index
- collector/usn-cve
- source/Ubuntu
- agent/references
- agent/tags
- collector/security-tracker-debian
- source/Debian
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- vendor/apple
- canonical/apple icloud for windows
- canonical/apple itunes for windows
- canonical/apple safari
- canonical/apple tvos
- canonical/apple ios
- canonical/apple iphone os
- canonical/apple icloud
- canonical/apple itunes
- vendor/microsoft
- canonical/microsoft windows
- package-manager/ubuntu
- package-manager/debian