// For flags

CVE-2021-1871

Apple iOS, iPadOS, and macOS WebKit Remote Code Execution Vulnerability

Severity Score

9.8
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

Yes
*KEV

Decision

-
*SSVC
Descriptions

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..

Se abordó un problema de lógica con unas restricciones mejoradas. Este problema es corregido en macOS Big Sur versión 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, iOS versión 14.4 y iPadOS versión 14.4. Un atacante remoto puede conllevar a una ejecución de código arbitraria. Apple tiene conocimiento de un reporte que indica que este problema puede haber sido explotado activamente.

A logic issue was found in WebKitGTK and WPE WebKit in versions prior to 2.32.0. A remote attacker may be able to cause arbitrary code execution. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Apple iOS, iPadOS, and macOS WebKit contain an unspecified logic vulnerability that allows a remote attacker to execute code. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2020-12-08 CVE Reserved
  • 2021-01-27 CVE Published
  • 2021-11-03 Exploited in Wild
  • 2021-11-17 KEV Due Date
  • 2024-07-27 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- First Exploit
CWE
  • CWE-20: Improper Input Validation
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apple
Search vendor "Apple"
 Ipad Os
Search vendor "Apple" for product "Ipad Os"
 < 14.4
Search vendor "Apple" for product "Ipad Os" and version " < 14.4"
-
Affected
Apple
Search vendor "Apple"
 Iphone Os
Search vendor "Apple" for product "Iphone Os"
 < 14.4
Search vendor "Apple" for product "Iphone Os" and version " < 14.4"
-
Affected
Apple
Search vendor "Apple"
 Mac Os X
Search vendor "Apple" for product "Mac Os X"
 >= 10.15 < 10.15.7
Search vendor "Apple" for product "Mac Os X" and version " >= 10.15 < 10.15.7"
-
Affected
Apple
Search vendor "Apple"
 Mac Os X
Search vendor "Apple" for product "Mac Os X"
 10.15.7
Search vendor "Apple" for product "Mac Os X" and version "10.15.7"
-
Affected
Apple
Search vendor "Apple"
 Mac Os X
Search vendor "Apple" for product "Mac Os X"
 10.15.7
Search vendor "Apple" for product "Mac Os X" and version "10.15.7"
security_update_2020
Affected
Apple
Search vendor "Apple"
 Mac Os X
Search vendor "Apple" for product "Mac Os X"
 10.15.7
Search vendor "Apple" for product "Mac Os X" and version "10.15.7"
supplemental_update
Affected
Apple
Search vendor "Apple"
 Macos
Search vendor "Apple" for product "Macos"
 >= 11.0.1 < 11.2
Search vendor "Apple" for product "Macos" and version " >= 11.0.1 < 11.2"
-
Affected
Debian
Search vendor "Debian"
 Debian Linux
Search vendor "Debian" for product "Debian Linux"
 10.0
Search vendor "Debian" for product "Debian Linux" and version "10.0"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 33
Search vendor "Fedoraproject" for product "Fedora" and version "33"
-
Affected