Home/CVE/.NET and Visual Studio Elevation of Privilege Vulnerability
CVE

CVE-2021-31204

.NET and Visual Studio Elevation of Privilege Vulnerability

.NET and Visual Studio Elevation of Privilege Vulnerability.

HIGH · CVSS 7.3 EPSS 0.03717
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules5 YARA rules0
▤

Affected Products & Versions

7
microsoft .net>= 5.0 and <= 5.0.5
microsoft .net core>= 3.1 and <= 3.1.14
microsoft visual studio 2019>= 16.0 and < 16.4.22
microsoft visual studio 2019>= 16.5.0 and < 16.7.15
microsoft visual studio 2019>= 16.8.0 and < 16.9.5
microsoft visual studio 2019all versions
fedoraproject fedoraall versions
◈

Sigma Hunt Rules

5
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighUAC Bypass Using .NET Code Profiler on MMC
producthighPotential AMSI Bypass Via .NET Reflection
producthighETW Logging Tamper In .NET Processes Via CommandLine
producthighETW Logging Disabled In .NET Processes - Registry
producthighETW Logging Disabled In .NET Processes - Sysmon Registry
▣

Scoring & Timeline

7.3
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD11 May 2021 · 07:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

5
msrcCVE-2021-31204Elevation of Privilege
rhsaRHSA-2021:1547Important
rhsaRHSA-2021:1546Important
rhsaRHSA-2021:2037Important
rhsaRHSA-2021:2036Important
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4F3VM3RMPE7PNNLLI3BPCSAXITQZCFCA/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6M7KL3KTHJVQNRA3CWFUTESQJARQEHSZ/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FVMWZPF4FR6JPFSNAIDIUDULHZJBVCW6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LFXJPQUYUITJMV75YN3XIGE3KKN5GOCU/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UV4ITB3SUDGR23G7XALUVKFJMZERFUKF/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWF25Z3CZ6LYCOHZ7FPSFAQ426JUBUZ4/
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