CVE-2021-30855

CVSS V2 Medium 4.3 CVSS V3 Medium 5.5
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.
Overview
  • CVE ID
  • CVE-2021-30855
  • Assigner
  • cve@mitre.org
  • Vulnerability Status
  • Analyzed
  • Published Version
  • 2021-08-24T19:15:14
  • Last Modified Date
  • 2023-01-09T16:41:59
Weakness Enumerations
CWE URL
CWE-59 http://cwe.mitre.org/data/definitions/59.html
CPE Configuration (Product)
CPE Vulnerable Operator Version Start Version End
cpe:2.3:o:apple:ipad_os:*:*:*:*:*:*:*:* 1 OR 14.8
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:* 1 OR 14.8
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:* 1 OR 10.15.7
cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:* 1 OR
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:* 1 OR
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:* 1 OR
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:* 1 OR
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:* 1 OR
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:* 1 OR
cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:* 1 OR
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* 1 OR 11.6
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:* 1 OR 15.0
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:* 1 OR 8.0
CVSS Version 2
  • Version
  • 2.0
  • Vector String
  • AV:N/AC:M/Au:N/C:P/I:N/A:N
  • Access Vector
  • NETWORK
  • Access Compatibility
  • MEDIUM
  • Authentication
  • NONE
  • Confidentiality Impact
  • PARTIAL
  • Integrity Impact
  • NONE
  • Availability Impact
  • NONE
  • Base Score
  • 4.3
  • Severity
  • MEDIUM
  • Exploitability Score
  • 8.6
  • Impact Score
  • 2.9
CVSS Version 3
  • Version
  • 3.1
  • Vector String
  • CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
  • Attack Vector
  • LOCAL
  • Attack Compatibility
  • LOW
  • Privileges Required
  • NONE
  • User Interaction
  • REQUIRED
  • Scope
  • UNCHANGED
  • Confidentiality Impact
  • HIGH
  • Availability Impact
  • NONE
  • Base Score
  • 5.5
  • Base Severity
  • MEDIUM
  • Exploitability Score
  • 1.8
  • Impact Score
  • 3.6
References
Reference URL Reference Tags
https://support.apple.com/en-us/HT212814 Vendor Advisory
https://support.apple.com/en-us/HT212807 Vendor Advisory
https://support.apple.com/en-us/HT212804 Vendor Advisory
https://support.apple.com/en-us/HT212805 Vendor Advisory
https://support.apple.com/en-us/HT212819 Vendor Advisory
https://support.apple.com/kb/HT212815 Vendor Advisory
Sources
Source Name Source URL
NIST https://nvd.nist.gov/vuln/detail/CVE-2021-30855
MITRE https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-30855
History
Created Old Value New Value Data Type Notes
2022-05-10 06:33:00 Added to TrackCVE
2022-12-05 08:51:50 2021-08-24T19:15Z 2021-08-24T19:15:14 CVE Published Date updated
2022-12-05 08:51:50 2022-02-11T14:35:21 CVE Modified Date updated
2022-12-05 08:51:50 Analyzed Vulnerability Status updated
2023-01-09 17:14:06 2023-01-09T16:41:59 CVE Modified Date updated