CVE-2021-30855

Common vulnerabilities & exposures (CVE)

CVE database CVE database blogpost Release & EoL database

Published at: - 24-08-2021 09:15

Last modified: - 11-02-2022 03:35

Total changes: - 2

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.

Common Vulnerability Scoring System (CVSS)

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

Low

Attack complexity

Local

Attack vector

None

Availability

High

Confidentiality

None

Integrity

None

Privileges required

Unchanged

Scope

Required

User interaction

5.5

Base score

1.8

3.6

Exploitability score

Impact score

Verification logic

vendor=apple AND product=ipad_os AND versionEndExcluding=14.8

vendor=apple AND product=iphone_os AND versionEndExcluding=14.8

vendor=apple AND product=mac_os_x AND versionEndExcluding=10.15.7

vendor=apple AND product=mac_os_x AND version=10.15.7 AND update=-

vendor=apple AND product=mac_os_x AND version=10.15.7 AND update=security_update_2020-001

vendor=apple AND product=mac_os_x AND version=10.15.7 AND update=security_update_2021-001

vendor=apple AND product=mac_os_x AND version=10.15.7 AND update=security_update_2021-002

vendor=apple AND product=mac_os_x AND version=10.15.7 AND update=security_update_2021-003

vendor=apple AND product=mac_os_x AND version=10.15.7 AND update=security_update_2021-004

vendor=apple AND product=mac_os_x AND version=10.15.7 AND update=supplemental_update

vendor=apple AND product=macos AND versionEndExcluding=11.6

vendor=apple AND product=tvos AND versionEndExcluding=15.0

vendor=apple AND product=watchos AND versionEndExcluding=8.0

Reference

Keywords

CVE-2021-30855

Common vulnerabilities & exposures (CVE)

Description

Common Vulnerability Scoring System (CVSS)

Verification logic

Reference

NVD

CVE-2021-30855

CVE

Common vulnerabilities & exposures

CVSS

Common vulnerability scoring system

Security

Vulnerabilities

Exposures