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CVE-2021-1820

Date: September 8, 2021

A memory initialization issue was addressed with improved memory handling. This issue is fixed in macOS Big Sur 11.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5. Processing maliciously crafted web content may result in the disclosure of process memory.

Severity Score

Related Resources (10)

https://nvd.nist.gov/vuln/detail/CVE-2021-1820
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-1820
https://support.apple.com/en-us/HT212323
https://security.alpinelinux.org/vuln/CVE-2021-1820
https://support.apple.com/en-us/HT212324
https://access.redhat.com/security/cve/CVE-2021-1820
https://security-tracker.debian.org/tracker/CVE-2021-1820
https://support.apple.com/en-us/HT212317
https://support.apple.com/en-us/HT212325
https://www.mend.io/vulnerability-database/CVE-2021-1820

Severity Score

Weakness Type (CWE)

Exposure of Resource to Wrong Sphere

CWE-668

Improper Initialization

CWE-665

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): MEDIUM
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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