Detections
Analytics
Security Update for .NET Core (March 2021)
high Nessus Plugin ID 147946
Language:
Synopsis
The remote Windows host is affected by a .NET Core remote code execution (RCE) vulnerability.Description
The Microsoft .NET Core installation on the remote host is version 2.1.x prior to 2.1.26, 3.1.x prior to 3.1.13, or 5.x prior to 5.0.4. It is, therefore, affected by a remote code execution vulnerability. An unauthenticated, remote attacker can exploit this to bypass authentication and execute arbitrary commands.Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update .NET Core, remove vulnerable packages and refer to vendor advisory.See Also
https://dotnet.microsoft.com/download/dotnet-core/2.1
https://dotnet.microsoft.com/download/dotnet-core/3.1
https://dotnet.microsoft.com/download/dotnet/5.0
https://github.com/dotnet/runtime/issues/49377
https://devblogs.microsoft.com/dotnet/net-march-2021/
http://www.nessus.org/u?ba8a76f7
Plugin Details
Severity: High
ID: 147946
File Name: smb_nt_ms21_mar_dotnet_core.nasl
Version: 1.4
Type: local
Agent: windows
Family: Windows
Published: 3/22/2021
Updated: 1/9/2024
Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: High
Score: 7.4
CVSS v2
Risk Factor: High
Base Score: 7.5
Temporal Score: 5.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2021-26701
CVSS v3
Risk Factor: High
Base Score: 8.1
Temporal Score: 7.1
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
CPE: cpe:/a:microsoft:.net_core
Required KB Items: installed_sw/.NET Core Windows
Exploit Ease: No known exploits are available
Patch Publication Date: 3/12/2021
Vulnerability Publication Date: 2/9/2021
Reference Information
CVE: CVE-2021-26701
IAVA: 2021-A-0091-S