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CVE-2021-31958— Windows NTLM Elevation of Privilege Vulnerability

Quick assessment

Affected
Microsoft Windows 10 Version 1809
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.

Libntlm是一款NTLM（NT LAN Manager）身份验证库。 Windows NTLM存在安全漏洞。以下产品和版本受到影响：Windows 10 Version 1909 for ARM64-based Systems,Windows 10 Version 21H1 for x64-based Systems,Windows 10 Version 21H1 for ARM64-based Systems,Windows 7 for x64-based Systems Service Pack

CVSS 7.5 · High EPSS 2.66% · P84

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-31958

Vulnerability Information
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Vulnerability Title
Windows NTLM Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Windows NTLM Elevation of Privilege Vulnerability
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Windows NTLM 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Libntlm是一款NTLM（NT LAN Manager）身份验证库。 Windows NTLM存在安全漏洞。以下产品和版本受到影响：Windows 10 Version 1909 for ARM64-based Systems,Windows 10 Version 21H1 for x64-based Systems,Windows 10 Version 21H1 for ARM64-based Systems,Windows 7 for x64-based Systems Service Pack
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 Windows 10 Version 1809 10.0.0 ~ 10.0.17763.1999 cpe:2.3:o:microsoft:windows_10_1809:10.0.17763.1999:*:*:*:*:*:x86:*
Microsoft Windows Server 2019 10.0.0 ~ 10.0.17763.1999 cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.1999:*:*:*:*:*:*:*
Microsoft Windows Server 2019 (Server Core installation) 10.0.0 ~ 10.0.17763.1999 cpe:2.3:o:microsoft:windows_server_2019:10.0.17763.1999:*:*:*:*:*:*:*
Microsoft Windows 10 Version 1909 10.0.0 ~ 10.0.18363.1621 cpe:2.3:o:microsoft:windows_10_1909:10.0.18363.1621:*:*:*:*:*:x86:*
Microsoft Windows 10 Version 21H1 10.0.0 ~ 10.0.19043.1052 cpe:2.3:o:microsoft:windows_10_21H1:10.0.19043.1052:*:*:*:*:*:x64:*
Microsoft Windows 10 Version 2004 10.0.0 ~ 10.0.19041.1052 cpe:2.3:o:microsoft:windows_10_1809:10.0.19041.1052:*:*:*:*:*:x64:*
Microsoft Windows Server version 2004 10.0.0 ~ 10.0.19041.1052 cpe:2.3:o:microsoft:windows_server_2004:10.0.19041.1052:*:*:*:*:*:*:*
Microsoft Windows 10 Version 20H2 10.0.0 ~ 10.0.19042.1052 cpe:2.3:o:microsoft:windows_10_20H2:10.0.19042.1052:*:*:*:*:*:x86:*
Microsoft Windows Server version 20H2 10.0.0 ~ 10.0.19042.1052 cpe:2.3:o:microsoft:windows_server_20H2:10.0.19042.1052:*:*:*:*:*:*:*
Microsoft Windows 10 Version 1507 10.0.0 ~ 10.0.10240.18967 cpe:2.3:o:microsoft:windows_10_1507:10.0.10240.18967:*:*:*:*:*:x86:*
Microsoft Windows 10 Version 1607 10.0.0 ~ 10.0.14393.4467 cpe:2.3:o:microsoft:windows_10_1607:10.0.14393.4467:*:*:*:*:*:x86:*
Microsoft Windows Server 2016 10.0.0 ~ 10.0.14393.4467 cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4467:*:*:*:*:*:*:*
Microsoft Windows Server 2016 (Server Core installation) 10.0.0 ~ 10.0.14393.4467 cpe:2.3:o:microsoft:windows_server_2016:10.0.14393.4467:*:*:*:*:*:*:*
Microsoft Windows 7 6.1.0 ~ 6.1.7601.25632 cpe:2.3:o:microsoft:windows_7:6.1.7601.25632:sp1:*:*:*:*:x86:*
Microsoft Windows 7 Service Pack 1 6.1.0 ~ 6.1.7601.25632 cpe:2.3:o:microsoft:windows_7:6.1.7601.25632:sp1:*:*:*:*:x64:*
Microsoft Windows 8.1 6.3.0 ~ 6.3.9600.20045 cpe:2.3:o:microsoft:windows_8.1:6.3.9600.20045:*:*:*:*:*:x86:*
Microsoft Windows Server 2008 Service Pack 2 6.0.0 ~ 6.0.6003.21137 cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21137:*:*:*:*:*:x64:*
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.0 ~ 6.0.6003.21137 cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21137:*:*:*:*:*:x64:*
Microsoft Windows Server 2008 Service Pack 2 6.0.0 ~ 6.0.6003.21137 cpe:2.3:o:microsoft:windows_server_2008_sp2:6.0.6003.21137:*:*:*:*:*:x86:*
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.0 ~ 6.1.7601.25632 cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25632:*:*:*:*:*:x64:*
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.0.0 ~ 6.1.7601.25632 cpe:2.3:o:microsoft:windows_server_2008_R2:6.1.7601.25632:*:*:*:*:*:x64:*
Microsoft Windows Server 2012 6.2.0 ~ 6.2.9200.23372 cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23372:*:*:*:*:*:x64:*
Microsoft Windows Server 2012 (Server Core installation) 6.2.0 ~ 6.2.9200.23372 cpe:2.3:o:microsoft:windows_server_2012:6.2.9200.23372:*:*:*:*:*:x64:*
Microsoft Windows Server 2012 R2 6.3.0 ~ 6.3.9600.20045 cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20045:*:*:*:*:*:x64:*
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.0 ~ 6.3.9600.20045 cpe:2.3:o:microsoft:windows_server_2012_R2:6.3.9600.20045:*:*:*:*:*:x64:*

II. Public POCs for CVE-2021-31958

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III. Intelligence Information for CVE-2021-31958

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Vendor Advisories for CVE-2021-31958 (1)

Same Patch Batch · Microsoft · 2021-06-08 · 50 CVEs total

CVE-2021-31962 9.4 CRITICAL Kerberos AppContainer Security Feature Bypass Vulnerability
CVE-2021-31977 8.6 HIGH Windows Hyper-V Denial of Service Vulnerability
CVE-2021-33739 8.4 HIGH Microsoft DWM Core Library Elevation of Privilege Vulnerability
CVE-2021-33741 8.2 HIGH Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability
CVE-2021-31980 8.1 HIGH Microsoft Intune Management Extension Remote Code Execution Vulnerability
CVE-2021-31973 7.8 HIGH Windows GPSVC Elevation of Privilege Vulnerability
CVE-2021-31942 7.8 HIGH 3D Viewer Remote Code Execution Vulnerability
CVE-2021-31969 7.8 HIGH Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
CVE-2021-31967 7.8 HIGH VP9 Video Extensions Remote Code Execution Vulnerability
CVE-2021-31940 7.8 HIGH Microsoft Office Graphics Remote Code Execution Vulnerability
CVE-2021-31939 7.8 HIGH Microsoft Excel Remote Code Execution Vulnerability
CVE-2021-31941 7.8 HIGH Microsoft Office Graphics Remote Code Execution Vulnerability
CVE-2021-31943 7.8 HIGH 3D Viewer Remote Code Execution Vulnerability
CVE-2021-31956 7.8 HIGH Windows NTFS Elevation of Privilege Vulnerability
CVE-2021-31954 7.8 HIGH Windows Common Log File System Driver Elevation of Privilege Vulnerability
CVE-2021-31952 7.8 HIGH Windows Kernel-Mode Driver Elevation of Privilege Vulnerability
CVE-2021-31953 7.8 HIGH Windows Filter Manager Elevation of Privilege Vulnerability
CVE-2021-31951 7.8 HIGH Windows Kernel Elevation of Privilege Vulnerability
CVE-2021-31945 7.8 HIGH Paint 3D Remote Code Execution Vulnerability
CVE-2021-31946 7.8 HIGH Paint 3D Remote Code Execution Vulnerability

Showing top 20 of 50 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Windows 10 Version 1809
Same vendor: Microsoft

V. Comments for CVE-2021-31958

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