Information disclosure in Microsoft .NET Core and Visual Studio - CVE-2021-41355

Vulnerability identifier: #VU57311

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-41355

CWE-ID: CWE-200

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application in .NET Core and Visual Studio. A remote attacker on the local network can gain unauthorized access to sensitive information on the system.

Microsoft .NET Core
Visual Studio
rh-dotnet50-dotnet (Red Hat package)
dotnet5.0 (Red Hat package)
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
dotnet-apphost-pack-5.0
dotnet-hostfxr-5.0
dotnet-runtime-5.0
dotnet-targeting-pack-5.0
dotnet-sdk-5.0
dotnet-sdk-5.0-source-built-artifacts
dotnet-templates-5.0
Red Hat Enterprise Linux for x86_64
Anolis OS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS

Install updates from vendor's website.

rh-dotnet50-dotnet (Red Hat package) - update to 5.0.208-1.el7_9
dotnet5.0 (Red Hat package) - update to 5.0.208-1.el8_4
dotnet-apphost-pack-5.0 - update to 5.0.14-1.0.1
dotnet-hostfxr-5.0 - update to 5.0.14-1.0.1
dotnet-runtime-5.0 - update to 5.0.14-1.0.1
dotnet-targeting-pack-5.0 - update to 5.0.14-1.0.1
dotnet-sdk-5.0 - update to 5.0.211-1.0.1
dotnet-sdk-5.0-source-built-artifacts - update to 5.0.211-1.0.1
dotnet-templates-5.0 - update to 5.0.211-1.0.1

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

• Information disclosure in Microsoft .NET Core and Visual Studio
• Red Hat Enterprise Linux update for rh-dotnet50-dotnet
• Red Hat Enterprise Linux 8 update for .NET 5.0
• Anolis OS update for dotnet5.0