CVE-2021-30665
Apple Multiple Products WebKit Memory Corruption Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 17 November 2021). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
A memory corruption issue was addressed with improved state management. This issue is fixed in watchOS 7.4.1, iOS 14.5.1 and iPadOS 14.5.1, tvOS 14.6, iOS 12.5.3, macOS Big Sur 11.3.1. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 3.67% probability · 89th percentile
- CISA KEV
- Listed 3 November 2021 · due 17 November 2021
- Weakness
- CWE-787
- Affected
- apple/ipados · apple/iphone os · apple/macos · apple/tvos · apple/watchos
- Source
- product-security@apple.com
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2021-30665
References
- https://support.apple.com/en-us/HT212335Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212336Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212339Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212341Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212532Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212335Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212336Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212339Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212341Release Notes, Vendor Advisory
- https://support.apple.com/en-us/HT212532Release Notes, Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-30665Third Party Advisory, US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.