Vulnerability CVE-2021-1871

Vulnerability Name:

CVE-2021-1871 (CCN-195639)

Assigned:

2020-12-08

Published:

2021-01-26

Updated:

2022-04-26

Summary:

A logic issue was addressed with improved restrictions. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS 14.4 and iPadOS 14.4. A remote attacker may be able to cause arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited..

CVSS v3 Severity:

9.8 Critical (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Attack Complexity (AC): Privileges Required (PR): User Interaction (UI):
Scope:	Scope (S):
Impact Metrics:	Confidentiality (C): Integrity (I): Availibility (A):

8.8 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
7.7 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Attack Complexity (AC): Privileges Required (PR): User Interaction (UI):
Scope:	Scope (S):
Impact Metrics:	Confidentiality (C): Integrity (I): Availibility (A):

9.8 Critical (REDHAT CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (REDHAT Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Attack Complexity (AC): Privileges Required (PR): User Interaction (UI):
Scope:	Scope (S):
Impact Metrics:	Confidentiality (C): Integrity (I): Availibility (A):

CVSS v2 Severity:

7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

9.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): Single_Instance
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-noinfo
CWE-20

Vulnerability Consequences:

Gain Access

References:

Source: MITRE
Type: CNA
CVE-2021-1871

Source: XF
Type: UNKNOWN
apple-ipados-cve20211871-code-exec(195639)

Source: FEDORA
Type: Mailing List, Third Party Advisory
FEDORA-2021-864dc37032

Source: CCN
Type: Apple security document HT212146
About the security content of iOS 14.4 and iPadOS 14.4

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

Source: CCN
Type: CYBERSECURITY & INFRASTRUCTURE SECURITY AGENCY
KNOWN EXPLOITED VULNERABILITIES CATALOG

Source: DEBIAN
Type: Third Party Advisory
DSA-4923

Source: CCN
Type: IBM Security Bulletin 6551876 (Cloud Pak for Security)
Cloud Pak for Security uses packages that are vulnerable to multiple CVEs

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 >= 10.15 and < 10.15.7)

OR cpe:/o:apple:mac_os_x:10.15.7:-:*:*:*:*:*:*

OR cpe:/o:apple:mac_os_x:10.15.7:security_update_2020:*:*:*:*:*:*

OR cpe:/o:apple:mac_os_x:10.15.7:supplemental_update:*:*:*:*:*:*

OR cpe:/o:apple:macos:*:*:*:*:*:*:*:* (Version >= 11.0.1 and < 11.2)

Configuration 2:

cpe:/o:debian:debian_linux:10.0:*:*:*:*:*:*:*

OR cpe:/o:fedoraproject:fedora:33:*:*:*:*:*:*:*

Configuration RedHat 1:

cpe:/a:redhat:enterprise_linux:8:*:*:*:*:*:*:*

Configuration RedHat 2:

cpe:/a:redhat:enterprise_linux:8::appstream:*:*:*:*:*

Configuration RedHat 3:

cpe:/a:redhat:enterprise_linux:8::crb:*:*:*:*:*

Configuration RedHat 4:

cpe:/o:redhat:enterprise_linux:8:*:*:*:*:*:*:*

Configuration RedHat 5:

cpe:/o:redhat:enterprise_linux:8::baseos:*:*:*:*:*

Configuration CCN 1:

cpe:/o:apple:macos_big_sur:11.0.0:*:*:*:*:*:*:*

OR cpe:/o:apple:ipados:14.3:*:*:*:*:*:*:*

OR cpe:/o:apple:ios:14.3:*:*:*:*:*:*:*

AND

cpe:/a:ibm:cloud_pak_for_security:1.7.2.0:*:*:*:*:*:*:*

Denotes that component is vulnerable