Vulnerability Name:

CVE-2021-1786 (CCN-195897)

Assigned:2020-12-08
Published:2021-02-01
Updated:2021-04-09
Summary:A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4 and iPadOS 14.4. A local user may be able to create or modify system files.
CVSS v3 Severity:5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N)
4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N)
4.8 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:4.9 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
4.6 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:S/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Local
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-noinfo
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2021-1786

Source: XF
Type: UNKNOWN
apple-macos-cve20211786-sec-bypass(195897)

Source: MISC
Type: Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212146

Source: CCN
Type: Apple security document HT212147
About the security content of macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave

Source: MISC
Type: Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212147

Source: MISC
Type: Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212148

Source: MISC
Type: Release Notes, Vendor Advisory
https://support.apple.com/en-us/HT212149

Vulnerable Configuration:Configuration 1:
  • cpe:/o:apple:ipados:*:*:*:*:*:*:*:* (Version < 14.4)
  • OR cpe:/o:apple:iphone_os:*:*:*:*:*:*:*:* (Version < 14.4)
  • OR cpe:/o:apple:mac_os_x:*:*:*:*:*:*:*:* (Version >= 10.14 and < 10.14.6)
  • OR cpe:/o:apple:mac_os_x:10.14.6:-:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:security_update_2019-004:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:security_update_2019-005:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:security_update_2019-006:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:security_update_2019-007:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:security_update_2020-001:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:security_update_2020-002:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:security_update_2020-003:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:security_update_2020-004:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:security_update_2020-005:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:security_update_2020-006:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:security_update_2020-007:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:supplemental_update:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.14.6:supplemental_update_2:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:*:*:*:*:*:*:*:* (Version >= 10.15 and < 10.15.7)
  • OR cpe:/o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*
  • OR cpe:/o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:*
  • OR cpe:/o:apple:macos:*:*:*:*:*:*:*:* (Version >= 11.0 and < 11.2)
  • OR cpe:/o:apple:tvos:*:*:*:*:*:*:*:* (Version < 14.4)
  • OR cpe:/o:apple:watchos:*:*:*:*:*:*:*:* (Version < 7.3)

    • Configuration CCN 1:
  • cpe:/o:apple:macos_big_sur:11.0.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    apple ipados *
    apple iphone os *
    apple mac os x *
    apple mac os x 10.14.6 -
    apple mac os x 10.14.6 security_update_2019-004
    apple mac os x 10.14.6 security_update_2019-005
    apple mac os x 10.14.6 security_update_2019-006
    apple mac os x 10.14.6 security_update_2019-007
    apple mac os x 10.14.6 security_update_2020-001
    apple mac os x 10.14.6 security_update_2020-002
    apple mac os x 10.14.6 security_update_2020-003
    apple mac os x 10.14.6 security_update_2020-004
    apple mac os x 10.14.6 security_update_2020-005
    apple mac os x 10.14.6 security_update_2020-006
    apple mac os x 10.14.6 security_update_2020-007
    apple mac os x 10.14.6 supplemental_update
    apple mac os x 10.14.6 supplemental_update_2
    apple mac os x *
    apple mac os x 10.15.7 -
    apple mac os x 10.15.7 supplemental_update
    apple macos *
    apple tvos *
    apple watchos *
    apple macos big sur 11.0.0