CVE-2021-30855 Information

Description

A validation issue existed in the handling of symlinks. This issue was addressed with improved validation of symlinks. This issue is fixed in Security Update 2021-005 Catalina iOS 14.8 and iPadOS 14.8 iOS 15 and iPadOS 15 watchOS 8 macOS Big Sur 11.6. An application may be able to access restricted files.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Reference

https://support.apple.com/en-us/HT212814 https://support.apple.com/en-us/HT212807 https://support.apple.com/en-us/HT212804 https://support.apple.com/en-us/HT212805 https://support.apple.com/en-us/HT212819 https://support.apple.com/kb/HT212815

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

5.5