CVE-2019-6205

macOS < 10.14.3 / iOS < 12.1.3 XNU - 'vm_map_copy' Optimization which Requires Atomicity isn't Atomic

Severity Score

7.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A memory corruption issue was addressed with improved lock state checking. This issue is fixed in iOS 12.1.3, macOS Mojave 10.14.3, tvOS 12.1.2. A malicious application may cause unexpected changes in memory shared between processes.

Se abordó un problema de corrupción de memoria con la mejora de la comprobación del estado de bloqueo. Este problema se ha resuelto en iOS 12.1.3, macOS Mojave 10.14.3 y tvOS 12.1.2. Una aplicación maliciosa podría provocar daños inesperados en la memoria compartida entre procesos.

XNU vm_map_copy optimization which requires atomicity is not atomic. This violates the semantics of mach message OOL memory, and leads to TOCTOU issues which can lead to memory corruption.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2019-01-11 CVE Reserved
2019-01-23 CVE Published
2024-07-26 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (6)

URL	Tag	Source
http://packetstormsecurity.com/files/156051/XNU-vm_map_copy-Insufficient-Fix.html	X_refsource_misc
http://www.securityfocus.com/bid/106695	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/46299	2024-08-04

URL	Date	SRC

URL	Date	SRC
https://support.apple.com/HT209443	2020-08-24
https://support.apple.com/HT209446	2020-08-24
https://support.apple.com/HT209447	2020-08-24

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Apple Search vendor "Apple"		Iphone Os Search vendor "Apple" for product "Iphone Os"				< 12.1.3 Search vendor "Apple" for product "Iphone Os" and version " < 12.1.3"		-		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				< 10.14.3 Search vendor "Apple" for product "Mac Os X" and version " < 10.14.3"		-		Affected
Apple Search vendor "Apple"		Tvos Search vendor "Apple" for product "Tvos"				< 12.1.2 Search vendor "Apple" for product "Tvos" and version " < 12.1.2"		-		Affected