CVE-2019-0568

Microsoft Edge Chakra - 'JsBuiltInEngineInterfaceExtensionObject::InjectJsBuiltInLibraryCode' Use-After-Free

Severity Score

7.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka "Chakra Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2019-0539, CVE-2019-0567.

Existe una vulnerabilidad de ejecución remota de código que se manifiesta en la forma en la que el motor de scripting de Chakra gestiona los objetos en la memoria en Microsoft Edge. Esto también se conoce como "Chakra Scripting Engine Memory Corruption Vulnerability". Esto afecta a Microsoft Edge y ChakraCore. El ID de este CVE es diferente de CVE-2019-0539 y CVE-2019-0567.

In Microsoft Edge, the JsBuiltInEngineInterfaceExtensionObject::InjectJsBuiltInLibraryCode method is used to execute JsBuiltIn.js which initializes some builtin objects. Because it is essentially written in JavaScript, it needs to clear the disable-implicit-call flag before calling the JavaScript code, otherwise it might not work properly. The problem is, it does not restore the previous status of the flag after the call. As setting the flag can prevent stack-allocated objects from leaking, this clearing-the-flag bug can lead to a stack-based use-after-free.

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-11-26 CVE Reserved
2019-01-08 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2024-11-17 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-787: Out-of-bounds Write

CAPEC

References (3)

URL	Tag	Source
http://www.securityfocus.com/bid/106420	Third Party Advisory

URL	Date	SRC
https://www.exploit-db.com/exploits/46205	2024-08-04

URL	Date	SRC
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0568	2020-08-24

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Microsoft Search vendor "Microsoft"	Edge Search vendor "Microsoft" for product "Edge"	-	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows 10 Search vendor "Microsoft" for product "Windows 10"	1803 Search vendor "Microsoft" for product "Windows 10" and version "1803"	-	Safe
Microsoft Search vendor "Microsoft"	Edge Search vendor "Microsoft" for product "Edge"	-	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows 10 Search vendor "Microsoft" for product "Windows 10"	1809 Search vendor "Microsoft" for product "Windows 10" and version "1809"	-	Safe
Microsoft Search vendor "Microsoft"	Edge Search vendor "Microsoft" for product "Edge"	-	-	Affected	in	Microsoft Search vendor "Microsoft"	Windows Server 2019 Search vendor "Microsoft" for product "Windows Server 2019"	-	-	Safe
Microsoft Search vendor "Microsoft"		Chakracore Search vendor "Microsoft" for product "Chakracore"				-		-		Affected