Vulnerabilities > CVE-2021-30755 - Out-of-bounds Read vulnerability in Apple Macos and Tvos

CVSS 4.3 - MEDIUM

Attack vector

NETWORK

Attack complexity

MEDIUM

Privileges required

NONE

Confidentiality impact

PARTIAL

Integrity impact

NONE

Availability impact

NONE

network

apple

CWE-125

NVD

Published: 2021-09-08

Updated: 2021-09-15

Summary

Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5. An out-of-bounds read was addressed with improved input validation.

Vulnerable Configurations

Part	Description	Count
OS	Apple Apple Macos 11.0 Apple Macos 11.0.1 Apple Macos 11.1 Apple Macos 11.1.0 Apple Macos 11.2 Apple Macos 11.2.1 Apple Macos 11.3 Apple Macos 11.3.1 Apple Tvos 1.0.0 Apple Tvos 1.1.0 Apple Tvos 2.0.0 Apple Tvos 2.0.1 Apple Tvos 2.0.2 Apple Tvos 2.1.0 Apple Tvos 2.2.0 Apple Tvos 2.3.0 Apple Tvos 2.3.1 Apple Tvos 2.4.0 Apple Tvos 3.0.0 Apple Tvos 3.0.1 Apple Tvos 3.0.2 Apple Tvos 4.1.0 Apple Tvos 4.1.1 Apple Tvos 4.2.0 Apple Tvos 4.2.1 Apple Tvos 4.2.2 Apple Tvos 4.3.0 Apple Tvos 4.4.0 Apple Tvos 4.4.2 Apple Tvos 4.4.3 Apple Tvos 4.4.4 Apple Tvos 5.0.0 Apple Tvos 5.0.1 Apple Tvos 5.0.2 Apple Tvos 5.1.0 Apple Tvos 5.1.1 Apple Tvos 5.2.0 Apple Tvos 6.0 Apple Tvos 6.0.1 Apple Tvos 6.0.2 Apple Tvos 6.1 Apple Tvos 6.1.1 Apple Tvos 6.1.2 Apple Tvos 6.2 Apple Tvos 6.2.1 Apple Tvos 7.0 Apple Tvos 7.0.1 Apple Tvos 7.0.2 Apple Tvos 7.0.3 Apple Tvos 7.1 Apple Tvos 9.0 Apple Tvos 9.0.1 Apple Tvos 9.1 Apple Tvos 9.1.1 Apple Tvos 9.2 Apple Tvos 9.2.1 Apple Tvos 9.2.2 Apple Tvos 10.0 Apple Tvos 10.0.1 Apple Tvos 10.1 Apple Tvos 10.1.1 Apple Tvos 10.2 Apple Tvos 10.2.1 Apple Tvos 10.2.2 Apple Tvos 11 Apple Tvos 11.0 Apple Tvos 11.1 Apple Tvos 11.2 Apple Tvos 11.2.1 Apple Tvos 11.2.6 Apple Tvos 11.3 Apple Tvos 11.4.1 Apple Tvos 12 Apple Tvos 12.0 Apple Tvos 12.0.1 Apple Tvos 12.1 Apple Tvos 12.1.1 Apple Tvos 12.1.2 Apple Tvos 12.2 Apple Tvos 12.3 Apple Tvos 12.4 Apple Tvos 13 Apple Tvos 13.0 Apple Tvos 13.2 Apple Tvos 13.3 Apple Tvos 13.3.1 Apple Tvos 13.4 Apple Tvos 13.4.5 Apple Tvos 13.4.6 Apple Tvos 13.4.8 Apple Tvos 14.0 Apple Tvos 14.2 Apple Tvos 14.3 Apple Tvos 14.4 Apple Tvos 14.5 Apple Watchos 1.0 Apple Watchos 1.0.1 Apple Watchos 2.0 Apple Watchos 2.0.1 Apple Watchos 2.1 Apple Watchos 2.2 Apple Watchos 2.2.0 Apple Watchos 2.2.1 Apple Watchos 2.2.2 Apple Watchos 3.0 Apple Watchos 3.1 Apple Watchos 3.1.1 Apple Watchos 3.1.3 Apple Watchos 3.2 Apple Watchos 3.2.2 Apple Watchos 3.2.3 Apple Watchos 4 Apple Watchos 4.0 Apple Watchos 4.0.1 Apple Watchos 4.1 Apple Watchos 4.2.3 Apple Watchos 4.3 Apple Watchos 4.3.1 Apple Watchos 4.3.2 Apple Watchos 5.0 Apple Watchos 5.0.1 Apple Watchos 5.1 Apple Watchos 5.1.1 Apple Watchos 5.1.2 Apple Watchos 5.1.3 Apple Watchos 5.2 Apple Watchos 5.2.1 Apple Watchos 5.3 Apple Watchos 5.3.4 Apple Watchos 5.3.7 Apple Watchos 5.3.9 Apple Watchos 6.0 Apple Watchos 6.0.0 Apple Watchos 6.0.1 Apple Watchos 6.1 Apple Watchos 6.1.1 Apple Watchos 6.1.2 Apple Watchos 6.1.3 Apple Watchos 6.2 Apple Watchos 6.2.5 Apple Watchos 6.2.6 Apple Watchos 6.2.8 Apple Watchos 6.2.9 Apple Watchos 7.0 Apple Watchos 7.1 Apple Watchos 7.2 Apple Watchos 7.3 Apple Watchos 7.3.2 Apple Watchos 7.3.3 Apple Watchos 7.4 Apple Watchos 7.4.1	151

Common Weakness Enumeration (CWE)

CWE-125 - Out-of-bounds Read

Common Attack Pattern Enumeration and Classification (CAPEC)

Overread Buffers
An adversary attacks a target by providing input that causes an application to read beyond the boundary of a defined buffer. This typically occurs when a value influencing where to start or stop reading is set to reflect positions outside of the valid memory location of the buffer. This type of attack may result in exposure of sensitive information, a system crash, or arbitrary code execution.

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

References