Home/CVE/Multiple memory corruption issues were addressed with improved input validation. This issue is fixed in macOS Big Sur 11
CVE

CVE-2020-9967

Multiple memory corruption issues were addressed with improved input validation. This issue is fixed in macOS Big Sur 11

Multiple memory corruption issues were addressed with improved input validation. This issue is fixed in macOS Big Sur 11.0.1, tvOS 14.0, macOS Big Sur 11.1, Security Update 2020-001 Catalina, Security Update 2020-007 Mojave, watchOS 7.0, iOS 14.0 and iPadOS 14.0. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

HIGH · CVSS 7.8 EPSS 0.01262
Act now
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules8 YARA rules0
⬡

Weakness Classification

CWE-787Out-of-bounds Write
▤

Affected Products & Versions

8
apple ipados< 14.0
apple iphone os< 14.0
apple mac os x>= 10.14 and < 10.14.6
apple mac os x>= 10.15 and < 10.15.7
apple mac os xall versions
apple macos>= 11.0 and < 11.1.0
apple tvos< 14.0
apple watchos< 7.0
⚠

Public Exploits & PoCs

1
pocpacketstormsecurity.com · XNU-Network-Stack-Kernel-Heap-Overflow.htmlpacketstormsecurity.com
◈

Sigma Hunt Rules

8
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighRemote Access Tool - Renamed MeshAgent Execution - MacOS
producthighBinary Padding - MacOS
productmediumSuspicious Execution via macOS Script Editor
productmediumSystem Information Discovery Via Sysctl - MacOS
productmediumNew File Exclusion Added To Time Machine Via Tmutil - MacOS
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · product-security@apple.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD02 Apr 2021 · 06:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://support.apple.com/en-us/HT211843Vendor Advisory
https://support.apple.com/en-us/HT211844Vendor Advisory
https://support.apple.com/en-us/HT211850Vendor Advisory
https://support.apple.com/en-us/HT211931Vendor Advisory
https://support.apple.com/en-us/HT212011Vendor Advisory
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