CVE-2021-30738

MEDIUM

macOS 10.14.0-10.14.4 and 11.0.1-11.3 - Arbitrary File Write via Hardlink Path Validation Bypass

Title source: llm
STIX 2.1

Description

A malicious application may be able to overwrite arbitrary files. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-004 Mojave. An issue with path validation logic for hardlinks was addressed with improved path sanitization.

References (2)

Core 2
Core References
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212529
Vendor Advisory x_refsource_misc
https://support.apple.com/en-us/HT212531

Scores

CVSS v3 5.5
EPSS 0.0031
EPSS Percentile 22.5%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Details

Status published
Products (3)
apple/mac_os_x 10.14.6 (19 CPE variants)
apple/mac_os_x 10.14.0 - 10.14.5
apple/macos 11.0.1 - 11.4
Published Sep 08, 2021
Tracked Since Feb 18, 2026