// For flags

CVE-2020-3836

XNU OUserClient::_sendAsyncResult64() ipc_port Pointer Disclosure

Severity Score

5.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

An access issue was addressed with improved memory management. This issue is fixed in iOS 13.3.1 and iPadOS 13.3.1, macOS Catalina 10.15.3, tvOS 13.3.1, watchOS 6.1.2. A malicious application may be able to determine kernel memory layout.

Se abordó un problema de acceso con una administración de la memoria mejorada. Este problema es corregido en iOS versión 13.3.1 y iPadOS versión 13.3.1, macOS Catalina versión 10.15.3, tvOS versión 13.3.1, watchOS versión 6.1.2. Una aplicación maliciosa puede ser capaz de determinar el diseño de la memoria del kernel.

The XNU function IOUserClient::_sendAsyncResult64() discloses the address of the ipc_port to which the notification is sent in the Mach message enqueued on the notification port.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Local
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2019-12-18 CVE Reserved
  • 2020-01-29 CVE Published
  • 2023-03-08 EPSS Updated
  • 2024-08-04 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
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"
 Ipados
Search vendor "Apple" for product "Ipados"
 < 13.3.1
Search vendor "Apple" for product "Ipados" and version " < 13.3.1"
-
Affected
Apple
Search vendor "Apple"
 Iphone Os
Search vendor "Apple" for product "Iphone Os"
 < 13.3.1
Search vendor "Apple" for product "Iphone Os" and version " < 13.3.1"
-
Affected
Apple
Search vendor "Apple"
 Mac Os X
Search vendor "Apple" for product "Mac Os X"
 < 10.15.3
Search vendor "Apple" for product "Mac Os X" and version " < 10.15.3"
-
Affected
Apple
Search vendor "Apple"
 Tvos
Search vendor "Apple" for product "Tvos"
 < 13.3.1
Search vendor "Apple" for product "Tvos" and version " < 13.3.1"
-
Affected
Apple
Search vendor "Apple"
 Watchos
Search vendor "Apple" for product "Watchos"
 < 6.1.2
Search vendor "Apple" for product "Watchos" and version " < 6.1.2"
-
Affected