CVE-2021-30900
Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 20 April 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 5.20% probability · 92th percentile
- CISA KEV
- Listed 30 March 2023 · due 20 April 2023
- Weakness
- CWE-787
- Affected
- apple/ipados · apple/iphone os · apple/macos
- Source
- product-security@apple.com
CISA notes
Apply updates per vendor instructions. https://support.apple.com/en-us/HT21286, https://support.apple.com/en-us/HT212868, https://support.apple.com/kb/HT212872; https://nvd.nist.gov/vuln/detail/CVE-2021-30900
References
- https://support.apple.com/en-us/HT212867Vendor Advisory
- https://support.apple.com/en-us/HT212868Vendor Advisory
- https://support.apple.com/kb/HT212872Vendor Advisory
- https://support.apple.com/en-us/HT212867Vendor Advisory
- https://support.apple.com/en-us/HT212868Vendor Advisory
- https://support.apple.com/kb/HT212872Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30900US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.