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CVE-2021-42279— Chakra Scripting Engine Memory Corruption Vulnerability

Quick assessment

Affected
Microsoft ChakraCore
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Microsoft Windows Scripting是美国微软（Microsoft）公司的一个Windows操作系统的脚本语言。 Microsoft Windows Scripting存在缓冲区错误漏洞。以下产品和版本受到影响：Windows 10 Version 21H1 for x64-based Systems,Windows 11 for ARM64-based Systems,Windows 11 for x64-based Systems,Windows Server 2022,Window

CVSS 4.2 · Medium EPSS 2.30% · P83

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 15

VendorProduct Version RangeStatus
Microsoft ChakraCore - affected
Microsoft Windows 10 Version 1507 10.0.10240.0< 10.0.10240.19119 affected
Microsoft Windows 10 Version 1607 10.0.14393.0< 10.0.14393.4770 affected
Microsoft Windows 10 Version 1809 10.0.0< 10.0.17763.2300 affected
10.0.17763.0< 10.0.17763.2300 affected
Microsoft Windows 10 Version 1909 10.0.0< 10.0.18363.1916 affected
Microsoft Windows 10 Version 2004 10.0.0< 10.0.19041.1348 affected
Microsoft Windows 10 Version 20H2 10.0.0< 10.0.19042.1348 affected
Microsoft Windows 10 Version 21H1 10.0.0< 10.0.19043.1348 affected
Microsoft Windows 11 version 21H2 10.0.22000.0< 10.0.22000.318 affected
Microsoft Windows Server 2016 10.0.14393.0< 10.0.14393.4770 affected
Microsoft Windows Server 2019 10.0.17763.0< 10.0.17763.2300 affected
Microsoft Windows Server 2022 10.0.20348.0< 10.0.20348.350 affected
Microsoft Windows Server version 2004 10.0.0< 10.0.19041.1348 affected
Microsoft Windows Server version 20H2 10.0.0< 10.0.19042.1348 affected
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I. Basic Information for CVE-2021-42279

Vulnerability Information
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Vulnerability Title
Chakra Scripting Engine Memory Corruption Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Chakra Scripting Engine Memory Corruption Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Microsoft Windows Scripting 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Microsoft Windows Scripting是美国微软（Microsoft）公司的一个Windows操作系统的脚本语言。 Microsoft Windows Scripting存在缓冲区错误漏洞。以下产品和版本受到影响：Windows 10 Version 21H1 for x64-based Systems,Windows 11 for ARM64-based Systems,Windows 11 for x64-based Systems,Windows Server 2022,Window
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Microsoft ChakraCore - -
Microsoft Windows 10 Version 1507 10.0.10240.0 ~ 10.0.10240.19119 -
Microsoft Windows 10 Version 1607 10.0.14393.0 ~ 10.0.14393.4770 -
Microsoft Windows 10 Version 1809 10.0.0 ~ 10.0.17763.2300 -
Microsoft Windows 10 Version 1809 10.0.17763.0 ~ 10.0.17763.2300 -
Microsoft Windows 10 Version 1909 10.0.0 ~ 10.0.18363.1916 -
Microsoft Windows 10 Version 2004 10.0.0 ~ 10.0.19041.1348 -
Microsoft Windows 10 Version 20H2 10.0.0 ~ 10.0.19042.1348 -
Microsoft Windows 10 Version 21H1 10.0.0 ~ 10.0.19043.1348 -
Microsoft Windows 11 version 21H2 10.0.22000.0 ~ 10.0.22000.318 -
Microsoft Windows Server 2016 10.0.14393.0 ~ 10.0.14393.4770 -
Microsoft Windows Server 2019 10.0.17763.0 ~ 10.0.17763.2300 -
Microsoft Windows Server 2022 10.0.20348.0 ~ 10.0.20348.350 -
Microsoft Windows Server version 2004 10.0.0 ~ 10.0.19041.1348 -
Microsoft Windows Server version 20H2 10.0.0 ~ 10.0.19042.1348 -

II. Public POCs for CVE-2021-42279

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III. Intelligence Information for CVE-2021-42279

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Vendor Advisories for CVE-2021-42279 (2)

Same Patch Batch · Microsoft · 2021-11-10 · 54 CVEs total

CVE-2021-26443 9.0 CRITICAL Microsoft Virtual Machine Bus (VMBus) Remote Code Execution Vulnerability
CVE-2021-38666 8.8 HIGH Remote Desktop Client Remote Code Execution Vulnerability
CVE-2021-42321 8.8 HIGH Microsoft Exchange Server Remote Code Execution Vulnerability
CVE-2021-42316 8.8 HIGH Microsoft Dynamics 365 On-Premises Remote Code Execution Vulnerability
CVE-2021-42283 8.8 HIGH NTFS Elevation of Privilege Vulnerability
CVE-2021-42275 8.8 HIGH Microsoft COM for Windows Remote Code Execution Vulnerability
CVE-2021-42296 7.8 HIGH Microsoft Word Remote Code Execution Vulnerability
CVE-2021-43208 7.8 HIGH 3D Viewer Remote Code Execution Vulnerability
CVE-2021-42298 7.8 HIGH Microsoft Defender Remote Code Execution Vulnerability
CVE-2021-43209 7.8 HIGH 3D Viewer Remote Code Execution Vulnerability
CVE-2021-42286 7.8 HIGH Windows Core Shell SI Host Extension Framework for Composable Shell Elevation of Privilege
CVE-2021-42285 7.8 HIGH Windows Kernel Elevation of Privilege Vulnerability
CVE-2021-42276 7.8 HIGH Microsoft Windows Media Foundation Remote Code Execution Vulnerability
CVE-2021-41378 7.8 HIGH Windows NTFS Remote Code Execution Vulnerability
CVE-2021-41377 7.8 HIGH Windows Fast FAT File System Driver Elevation of Privilege Vulnerability
CVE-2021-41370 7.8 HIGH NTFS Elevation of Privilege Vulnerability
CVE-2021-41367 7.8 HIGH NTFS Elevation of Privilege Vulnerability
CVE-2021-41366 7.8 HIGH Credential Security Support Provider Protocol (CredSSP) Elevation of Privilege Vulnerabili
CVE-2021-40442 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2021-36957 7.8 HIGH Windows Desktop Bridge Elevation of Privilege Vulnerability

Showing top 20 of 54 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: ChakraCore
Same vendor: Microsoft

V. Comments for CVE-2021-42279

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