Vulnerability · Published Oct 28, 2021 · Assigned by apple
CVE-2021-30818
High 8.8
In plain English
A high-severity security flaw in iOS and iPadOS from Apple. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.8High
Exploit odds (30 days)1.6%top 23.9% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A type confusion issue was addressed with improved state handling. This issue is fixed in iOS 14.8 and iPadOS 14.8, tvOS 15, iOS 15 and iPadOS 15, Safari 15, watchOS 8. Processing maliciously crafted web content may lead to arbitrary code execution.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | webkit2gtk3 | 2.34.6-1.el8 | ALSA-2022:1777 |
| AlmaLinux:8 | webkit2gtk3-devel | 2.34.6-1.el8 | ALSA-2022:1777 |
| AlmaLinux:8 | webkit2gtk3-jsc | 2.34.6-1.el8 | ALSA-2022:1777 |
| AlmaLinux:8 | webkit2gtk3-jsc-devel | 2.34.6-1.el8 | ALSA-2022:1777 |
| Alpine:v3.20 | webkit2gtk | 2.34.0-r0 | ALPINE-CVE-2021-30818 |
| Debian:12 | webkit2gtk | 2.34.1-1 | DEBIAN-CVE-2021-30818 |
| Debian:13 | webkit2gtk | 2.34.1-1 | DEBIAN-CVE-2021-30818 |
| Debian:14 | webkit2gtk | 2.34.1-1 | DEBIAN-CVE-2021-30818 |
| Debian:12 | wpewebkit | 2.34.1-1 | DEBIAN-CVE-2021-30818 |
| Debian:13 | wpewebkit | 2.34.1-1 | DEBIAN-CVE-2021-30818 |
| Debian:14 | wpewebkit | 2.34.1-1 | DEBIAN-CVE-2021-30818 |
| Rocky Linux:8 | webkit2gtk3 | 0:2.34.6-1.el8 | RLSA-2022:1777 |
| Ubuntu:22.04:LTS | qtwebkit-opensource-src | no fix listed | UBUNTU-CVE-2021-30818 |
| Ubuntu:24.04:LTS | qtwebkit-opensource-src | no fix listed | UBUNTU-CVE-2021-30818 |
| Ubuntu:22.04:LTS | webkit2gtk | 2.34.0-1ubuntu1 | UBUNTU-CVE-2021-30818 |
| Ubuntu:22.04:LTS | wpewebkit | no fix listed | UBUNTU-CVE-2021-30818 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apple | iOS and iPadOS | unspecified – before 14.8 |
| Apple | iOS and iPadOS | unspecified – before 15 |
| Apple | tvOS | unspecified – before 15 |
| Apple | Safari | unspecified – before 15 |
| Apple | watchOS | unspecified – before 8 |
References
- https://support.apple.com/en-us/HT212807 x_refsource_MISC
- https://support.apple.com/en-us/HT212814 x_refsource_MISC
- https://support.apple.com/en-us/HT212819 x_refsource_MISC
- https://support.apple.com/en-us/HT212815 x_refsource_MISC
- https://support.apple.com/en-us/HT212816 x_refsource_MISC
- https://support.apple.com/kb/HT212869 x_refsource_CONFIRM
- [oss-security] 20211220 WebKitGTK and WPE WebKit Security Advisory WSA-2021-0007 mailing-list, x_refsource_MLIST