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CVE

CVE-2023-35391

ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability

ASP.NET Core SignalR and Visual Studio Information Disclosure Vulnerability.

MEDIUM · CVSS 6.2 EPSS 0.02431
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules5 YARA rules0
▤

Affected Products & Versions

6
microsoft .net>= 6.0.0 and < 6.0.21
microsoft .net>= 7.0.0 and < 7.0.10
microsoft asp.net core>= 2.1 and < 2.1.40
microsoft visual studio 2022>= 17.2.0 and < 17.2.18
microsoft visual studio 2022>= 17.4.0 and < 17.4.10
microsoft visual studio 2022>= 17.6.0 and < 17.6.6
▤

Affected Packages

2
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
NuGet Microsoft.AspNetCore.SignalR.Redis HIGH fixed in 1.0.40
NuGet Microsoft.AspNetCore.SignalR.StackExchangeRedis HIGH fixed in 7.0.10
◈

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

6.2
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 NVD08 Aug 2023 · 07:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

3
siemens-csafSSA-341067
msrcCVE-2023-35391Information Disclosure
cisa-csafcisa-csaf-csaf_files-OT-white-2024-icsa-24-165-04
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