CVE-2021-30855

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-30855
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.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

4.3 /10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:N/AC:M/Au:N/C:P/I:N/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

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

Configuration 1 (hide)

OR cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
History

21 Nov 2024, 06:04

Type Values Removed Values Added
References () https://support.apple.com/en-us/HT212804 - () https://support.apple.com/en-us/HT212804 -
References () https://support.apple.com/en-us/HT212805 - () https://support.apple.com/en-us/HT212805 -
References () https://support.apple.com/en-us/HT212807 - () https://support.apple.com/en-us/HT212807 -
References () https://support.apple.com/en-us/HT212814 - () https://support.apple.com/en-us/HT212814 -
References () https://support.apple.com/en-us/HT212819 - () https://support.apple.com/en-us/HT212819 -
References () https://support.apple.com/kb/HT212815 - () https://support.apple.com/kb/HT212815 -

11 Feb 2022, 14:35

Type Values Removed Values Added
References (CONFIRM) https://support.apple.com/kb/HT212815 - (CONFIRM) https://support.apple.com/kb/HT212815 - Vendor Advisory

20 Jan 2022, 21:15

Type Values Removed Values Added
References
  • (CONFIRM) https://support.apple.com/kb/HT212815 -

01 Nov 2021, 16:22

Type Values Removed Values Added
CPE cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:*
CVSS v2 : unknown
v3 : unknown 		v2 : 4.3
v3 : 5.5
CWE CWE-59
References (MISC) https://support.apple.com/en-us/HT212814 - (MISC) https://support.apple.com/en-us/HT212814 - Vendor Advisory
References (MISC) https://support.apple.com/en-us/HT212819 - (MISC) https://support.apple.com/en-us/HT212819 - Vendor Advisory
References (MISC) https://support.apple.com/en-us/HT212804 - (MISC) https://support.apple.com/en-us/HT212804 - Vendor Advisory
References (MISC) https://support.apple.com/en-us/HT212805 - (MISC) https://support.apple.com/en-us/HT212805 - Vendor Advisory
References (MISC) https://support.apple.com/en-us/HT212807 - (MISC) https://support.apple.com/en-us/HT212807 - Vendor Advisory

28 Oct 2021, 19:15

Type Values Removed Values Added
References
  • (MISC) https://support.apple.com/en-us/HT212814 -
  • (MISC) https://support.apple.com/en-us/HT212804 -
  • (MISC) https://support.apple.com/en-us/HT212819 -
  • (MISC) https://support.apple.com/en-us/HT212805 -
  • (MISC) https://support.apple.com/en-us/HT212807 -
Summary ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: none. Reason: This candidate was withdrawn by the CVE program. Notes: none. 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.

24 Aug 2021, 19:15

Type Values Removed Values Added
New CVE
Information

Published : 2021-08-24 19:15

Updated : 2024-11-21 06:04

NVD link : CVE-2021-30855

Mitre link : CVE-2021-30855

CVE.ORG link : CVE-2021-30855

JSON object : View

Products Affected

apple

  • iphone_os
  • watchos
  • mac_os_x
  • tvos
  • macos
  • ipados
CWE
CWE-59

Improper Link Resolution Before File Access ('Link Following')