CVE-2021-30663
HighActively exploited (CISA KEV)
Description
An integer overflow was addressed with improved input validation. This issue is fixed in iOS 14.5.1 and iPadOS 14.5.1, tvOS 14.6, iOS 12.5.3, Safari 14.1.1, macOS Big Sur 11.3.1. Processing maliciously crafted web content may lead to arbitrary code execution.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Apple Multiple Products
PublishedSep 8, 2021
First seenSep 8, 2021
Added to KEVNov 3, 2021
Weakness typeCWE-190Integer overflow
How to fix
CISA required action
Apply updates per vendor instructions.
CISA due date: Nov 17, 2021Update
- apple safari14.1.1 or later
- apple ipados14.5.1 or later
- apple iphone_os12.5.3, 14.5.1 or later
- apple macos11.3.1 or later
- apple tvos14.6 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apple safari | v < 14.1.1 | 14.1.1 |
| apple ipados | 14.0 ≤ v < 14.5.1 | 14.5.1 |
| apple iphone_os | v < 12.5.3, 14.0 ≤ v < 14.5.1 | 12.5.3, 14.5.1 |
| apple macos | 11.0 ≤ v < 11.3.1 | 11.3.1 |
| apple tvos | v < 14.6 | 14.6 |
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