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TI-2020-03411 Aliases CVE-2020-3911GHSA-4736-pcjr-h7qf

Buffer overflow in Apple iOS

Priority MEDIUM 45CWE-120Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
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-120 and the CVSS impact.

Summary

A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 13.4 and iPadOS 13.4, macOS Catalina 10.15.4, tvOS 13.4, watchOS 6.2, iTunes for Windows 12.10.5, iCloud for Windows 10.9.3, iCloud for Windows 7.18. Multiple issues in libxml2.

Why it matters now

EPSS 0.01641 76th percentileScored 2026-11-07
Fix Fixed iOS (Apple): iOS 13.4 and iPadOS 13.4macOS (Apple): macOS Catalina 10.15.4+5 more products

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
AppleiOSbefore iOS 13.4 and iPadOS 13.4iOS 13.4 and iPadOS 13.4Patch availableCNA
ApplemacOSbefore macOS Catalina 10.15.4macOS Catalina 10.15.4Patch availableCNA
AppletvOSbefore tvOS 13.4tvOS 13.4Patch availableCNA
ApplewatchOSbefore watchOS 6.2watchOS 6.2Patch availableCNA
AppleiTunes for Windowsbefore iTunes for Windows 12.10.5iTunes for Windows 12.10.5Patch availableCNA
AppleiCloud for Windowsbefore iCloud for Windows 10.9.3iCloud for Windows 10.9.3Patch availableCNA
AppleiCloud for Windows (Legacy)before iCloud for Windows 7.18iCloud for Windows 7.18Patch availableCNA
  • iOS VendorApple Affected before iOS 13.4 and iPadOS 13.4 Fixed in iOS 13.4 and iPadOS 13.4 Patch available CNA
  • macOS VendorApple Affected before macOS Catalina 10.15.4 Fixed in macOS Catalina 10.15.4 Patch available CNA
  • tvOS VendorApple Affected before tvOS 13.4 Fixed in tvOS 13.4 Patch available CNA
  • watchOS VendorApple Affected before watchOS 6.2 Fixed in watchOS 6.2 Patch available CNA
  • iTunes for Windows VendorApple Affected before iTunes for Windows 12.10.5 Fixed in iTunes for Windows 12.10.5 Patch available CNA
  • iCloud for Windows VendorApple Affected before iCloud for Windows 10.9.3 Fixed in iCloud for Windows 10.9.3 Patch available CNA
  • iCloud for Windows (Legacy) VendorApple Affected before iCloud for Windows 7.18 Fixed in iCloud for Windows 7.18 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:*before 10.9.3VulnerableApple
cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:*before 12.10.5VulnerableApple
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*before 13.4VulnerableApple
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*before 13.4VulnerableApple
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*before 10.15.4VulnerableApple
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*before 13.4VulnerableApple
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*before 6.2VulnerableApple
  • cpe:2.3:a:apple:icloud:*:*:*:*:*:windows:*:* Versions before 10.9.3 Vulnerable ·Apple
  • cpe:2.3:a:apple:itunes:*:*:*:*:*:windows:*:* Versions before 12.10.5 Vulnerable ·Apple
  • cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:* Versions before 13.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* Versions before 13.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* Versions before 10.15.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* Versions before 13.4 Vulnerable ·Apple
  • cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* Versions before 6.2 Vulnerable ·Apple

Remediation

  • Fix · CNA iOS (Apple) Fixed in iOS 13.4 and iPadOS 13.4
  • Fix · CNA macOS (Apple) Fixed in macOS Catalina 10.15.4
  • Fix · CNA tvOS (Apple) Fixed in tvOS 13.4
  • Fix · CNA watchOS (Apple) Fixed in watchOS 6.2
  • Fix · CNA iTunes for Windows (Apple) Fixed in iTunes for Windows 12.10.5
  • Fix · CNA iCloud for Windows (Apple) Fixed in iCloud for Windows 10.9.3
  • Fix · CNA iCloud for Windows (Legacy) (Apple) Fixed in iCloud for Windows 7.18

Fixed in the same release

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

  • Release ·

    Apple iOS iOS 13.4 and iPadOS 13.4

    29 records Highest priority Priority MEDIUM 10 MEDIUM, 19 LOW

    Other records, highest priority first

    Show all 29 records →
  • Release ·

    Apple macOS macOS Catalina 10.15.4

    22 records Highest priority Priority MEDIUM 5 MEDIUM, 17 LOW

    Other records, highest priority first

    Show all 22 records →
Show 3 more groups
  • Release ·

    Apple tvOS tvOS 13.4

    19 records Highest priority Priority MEDIUM 10 MEDIUM, 9 LOW

    Other records, highest priority first

    Show all 19 records →
  • Release ·

    Apple watchOS watchOS 6.2

    17 records Highest priority Priority MEDIUM 9 MEDIUM, 8 LOW

    Other records, highest priority first

    Show all 17 records →
  • Release ·

    Apple iCloud for Windows, iCloud for Windows (Legacy), iTunes for Windows iCloud for Windows 10.9.3, iCloud for Windows 7.18, iTunes for Windows 12.10.5

    13 records Highest priority Priority MEDIUM 9 MEDIUM, 4 LOW

    Other records, highest priority first

    Show all 13 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-3911
  2. 2026-10-03 Alias added: GHSA-4736-pcjr-h7qf

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