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.

CVSS v3.0 5.5 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.5^/10

CVSS v3.0 : MEDIUM

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

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/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

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Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:apple:mac_os_x::::::::
	cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update::::::
	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:ipados::::::::
	cpe:2.3:o:apple:iphone_os::::::::
	cpe:2.3:o:apple:macos::::::::
	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:tvos::::::::

Information

Published : 2021-08-24 12:15

Updated : 2023-01-09 08:41

NVD link : CVE-2021-30855

Mitre link : CVE-2021-30855

JSON object : View

CWE

CWE-59

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

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Products Affected

apple

tvos
macos
mac_os_x
watchos
iphone_os
ipados

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