⚠ Actively exploited
Added to CISA KEV on 2023-03-30. Federal agencies required to patch by 2023-04-20. Required action: Apply updates per vendor instructions..

CVE-2021-30900 — Out-of-bounds Write in Apple IOS AND Ipados

CWE-787 — Out-of-bounds WriteCWE-20 — Improper Input Validation6 documents4 sources
Severity
7.8HIGHNVD
EPSS
0.5%
top 34.84%
CISA KEV
KEV
Added 2023-03-30
Due 2023-04-20
Exploit
Exploited in wild
Active exploitation observed
Affected products
7
Apple IOS AND IpadosApple IpadosApple Iphone OS+4 more
Timeline
PublishedAug 24
KEV addedMar 30
KEV dueApr 20
CISA Required Action: Apply updates per vendor instructions.

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 14.8.1 and iPadOS 14.8.1, iOS 15.1 and iPadOS 15.1. A malicious application may be able to execute arbitrary code with kernel privileges.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages7 packages

▶NVDapple/ipados< 14.8.1+1
▶CVEListV5apple/ios_and_ipadosunspecified — 15.1+1
▶NVDapple/macos< 11.6.1

🔴Vulnerability Details

1
VulnCheck
Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability↗2021
▶

📋Vendor Advisories

4
CISA
Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability↗2023-03-30
▶
Apple
CVE-2021-30900: iOS 14.8.1 and iPadOS 14.8.1↗2021-10-26
▶
Apple
CVE-2021-30900: iOS 15.1 and iPadOS 15.1↗2021-10-25
▶
Apple
CVE-2021-30900: macOS Big Sur 11.6.1↗2021-10-25
▶