CVE-2021-41355

Home/CVE/.NET Core and Visual Studio Information Disclosure Vulnerability

CVE

.NET Core and Visual Studio Information Disclosure Vulnerability

.NET Core and Visual Studio Information Disclosure Vulnerability.

MEDIUM · CVSS 5.7 EPSS 0.03608

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No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence

Sigma rules13 YARA rules0

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Affected Products & Versions

microsoft .netall versions
microsoft powershell>= 7.1 and < 7.1.5
microsoft visual studio 2019>= 16.0 and <= 16.11

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Affected Packages

Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.

NuGet System.DirectoryServices.Protocols MODERATE fixed in 5.0.1

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Sigma Hunt Rules

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

productcriticalBad Opsec Powershell Code Artifacts

Show all 13 top matchesproductcriticalSuspicious PowerShell Mailbox Export to Share - PS
productcriticalSuspicious PowerShell Mailbox Export to Share
productcriticalHackTool - Empire PowerShell UAC Bypass
productcriticalHackTool - DInjector PowerShell Cradle Execution
producthighDelete Volume Shadow Copies Via WMI With PowerShell
producthighPowerShell Called from an Executable Version Mismatch
producthighInvoke-Obfuscation Via Use Rundll32 - PowerShell Module

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Scoring & Timeline

5.7

MEDIUM · 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 NVD13 Oct 2021 · 01:15 AM

CVSS VectorCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

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Vendor Advisories

msrcCVE-2021-41355Information Disclosure
rhsaRHSA-2021:3818Important
rhsaRHSA-2021:3819Important

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References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-41355PatchVendor Advisory

https://www.oracle.com/security-alerts/cpujan2022.htmlNot ApplicableThird Party Advisory

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