Vulnerability Details : CVE-2021-30995

A race condition was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.6.2, tvOS 15.2, macOS Monterey 12.1, Security Update 2021-008 Catalina, iOS 15.2 and iPadOS 15.2, watchOS 8.3. A malicious application may be able to elevate privileges.

Published 2021-08-24 19:15:24

Updated 2022-02-21 04:59:07

Source MITRE

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-30995

Probability of exploitation activity in the next 30 days: 0.11%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 44 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-30995

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
5.1	MEDIUM	AV:N/AC:H/Au:N/C:P/I:P/A:P	4.9	6.4	nvd@nist.gov
Access Vector: Network Access Complexity: High Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
7.0	HIGH	CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H	1.0	5.9	nvd@nist.gov
Attack Vector: Local Attack Complexity: High Privileges Required: None User Interaction: Required Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-30995

CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-30995

https://support.apple.com/en-us/HT212975

About the security content of watchOS 8.3 - Apple Support
Vendor Advisory

CVEs referencing this url
https://support.apple.com/en-us/HT212978

About the security content of macOS Monterey 12.1 - Apple Support
Vendor Advisory

CVEs referencing this url
https://support.apple.com/en-us/HT212981

About the security content of Security Update 2021-008 Catalina - Apple Support
Vendor Advisory

CVEs referencing this url
https://www.zerodayinitiative.com/advisories/ZDI-22-360/

ZDI-22-360 | Zero Day Initiative
Third Party Advisory;VDB Entry
https://support.apple.com/en-us/HT212976

About the security content of iOS 15.2 and iPadOS 15.2 - Apple Support
Vendor Advisory

CVEs referencing this url
https://support.apple.com/en-us/HT212980

About the security content of tvOS 15.2 - Apple Support
Vendor Advisory

CVEs referencing this url
https://support.apple.com/en-us/HT212979

About the security content of macOS Big Sur 11.6.2 - Apple Support
Vendor Advisory

CVEs referencing this url

Products affected by CVE-2021-30995

Apple » Mac Os X
Versions from including (>=) 10.15 and before (<) 10.15.7
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
Matching versions
Apple » Mac Os X » Version: 10.15.7
cpe:2.3:o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*
Matching versions
Apple » Mac Os X » Version: 10.15.7 Update Security Update 2020-001
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*
Matching versions
Apple » Mac Os X » Version: 10.15.7 Update Supplemental Update
cpe:2.3:o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:*
Matching versions
Apple » Mac Os X » Version: 10.15.7 Update Security Update 2021-001
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*
Matching versions
Apple » Mac Os X » Version: 10.15.7 Update Security Update 2021-002
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*
Matching versions
Apple » Mac Os X » Version: 10.15.7 Update Security Update 2021-003
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*
Matching versions
Apple » Mac Os X » Version: 10.15.7 Update Security Update 2021-004
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:*
Matching versions
Apple » Mac Os X » Version: 10.15.7 Update Security Update 2021-005
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-005:*:*:*:*:*:*
Matching versions
Apple » Mac Os X » Version: 10.15.7 Update Security Update 2021-006
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-006:*:*:*:*:*:*
Matching versions
Apple » Mac Os X » Version: 10.15.7 Update Security Update 2021-007
cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-007:*:*:*:*:*:*
Matching versions
Apple » Iphone Os
Versions before (<) 15.2
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
Matching versions
Apple » Watchos
Versions before (<) 8.3
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
Matching versions
Apple » Tvos
Versions before (<) 15.2
cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
Matching versions
Apple » Macos
Versions from including (>=) 11.0 and before (<) 11.6.2
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Matching versions
Apple » Macos
Versions from including (>=) 12.0 and before (<) 12.1
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
Matching versions
Apple » Ipados
Versions before (<) 15.2
cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
Matching versions