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TI-2020-08068 Aliases CVE-2020-9999

Out-of-bounds write in Apple macOS

Priority MEDIUM 45CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

A memory corruption issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1, iTunes for Windows 12.10.9. Processing a maliciously crafted text file may lead to arbitrary code execution.

Why it matters now

EPSS 0.07957 94th percentileScored 2026-11-07
Fix Fixed macOS (Apple): 11.0, 12.10

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApplemacOSbefore 11.011.0Patch availableCNA
ApplemacOSbefore 12.1012.10Patch availableCNA
  • macOS VendorApple Affected before 11.0 Fixed in 11.0 Patch available CNA
  • macOS VendorApple Affected before 12.10 Fixed in 12.10 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*before 11.5.0VulnerableApple
cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:*before 12.10.9VulnerableApple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 14.0VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 14.0VulnerableApple
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*before 11.0.1VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 14.0VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 7.0VulnerableApple
  • cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:* Versions before 11.5.0 Vulnerable ·Apple
  • cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:* Versions before 12.10.9 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 14.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 14.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions before 11.0.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 14.0 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 7.0 Vulnerable ·Apple

Remediation

  • Fix · CNA macOS (Apple) Fixed in 11.0
  • Fix · CNA macOS (Apple) Fixed in 12.10

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apple macOS 11.0

    45 records Highest priority Priority CRITICAL 2 CRITICAL, 1 HIGH, 4 MEDIUM, 38 LOW

    Other records, highest priority first

    • TI-2020-16987 Type confusion in Apple watchOSPriority CRITICAL 93
    • TI-2020-16985 Out-of-bounds write in Apple watchOSPriority CRITICAL 93
    • TI-2020-17004 Apple watchOS: A malicious application may be able to disclose kernel memoryPriority HIGH 82
    Show all 45 records →
  • Release ·

    Apple macOS 12.10

    3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW

    Other records, highest priority first

    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-9999

References

Advisory 7

  • TI-2019-06084 Type confusion in Apple iOS KEVCVSS 3.1HIGH 8.8
  • TI-2020-16987 Type confusion in Apple watchOS KEVCVSS 3.1HIGH 7.8
  • TI-2020-07926 Apple iOS: A remote attacker may be able to cause arbitrary code execution CVSS 3.1CRITICAL 9.8
  • TI-2018-03187 Memory corruption in Apple WebKit CVSS 3.1HIGH 8.8
  • TI-2018-03118 Memory corruption in Apple WebKit CVSS 3.0HIGH 8.8
  • TI-2018-03361 Memory corruption in iOS, tvOS, watchOS, Safari, iTunes for Windows, iCloud for Windows CVSS 3.0HIGH 8.8
See all 448 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences