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Fencer Vulns
high 7.8

CVE-2023-21808 json

.NET and Visual Studio Remote Code Execution Vulnerability

published 2023-02-14 3 y ago modified 2026-09-08 2 mo ago also BIT-dotnet-2023-21808 , BIT-dotnet-sdk-2023-21808 , EUVD-2023-0660 , GHSA-824j-wqm8-89mj

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 67%
public exploits
0
none known

Summary

.NET and Visual Studio Remote Code Execution Vulnerability

Patch / fix

  • nuget Microsoft.NetCore.App.Runtime.win-arm 6.0.14, 7.0.3
  • nuget Microsoft.NetCore.App.Runtime.win-arm64 6.0.14, 7.0.3
  • nuget Microsoft.NetCore.App.Runtime.win-x64 6.0.14, 7.0.3
  • nuget Microsoft.NetCore.App.Runtime.win-x86 6.0.14, 7.0.3
  • bitnami dotnet 6.0.1, 7.0.1
  • bitnami dotnet-sdk 6.0.1, 7.0.1
  • Microsoft .NET 6.0 6.0.14
  • Microsoft .NET 7.0 7.0.3
  • Microsoft Microsoft .NET Framework 3.5 and 4.6.2 10.0.10240.19747
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2 10.0.04038.03
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8 10.0.04614.06
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8.1 10.0.09139.02
  • Microsoft Microsoft .NET Framework 4.6.2 4.7.04038.06
  • Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 4.7.04614.08
  • Microsoft Microsoft .NET Framework 4.8 4.8.04614.05
  • Microsoft Microsoft Visual Studio 2013 Update 5 12.0.40700.0
  • Microsoft Microsoft Visual Studio 2015 Update 3 14.0.27555.0
  • Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8) 15.9.52
  • Microsoft Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10) 16.11.24
  • Microsoft Microsoft Visual Studio 2022 version 17.0 17.0.19
  • Microsoft Microsoft Visual Studio 2022 version 17.2 17.2.13
  • Microsoft Microsoft Visual Studio 2022 version 17.4 17.4.5
  • Microsoft PowerShell 7.2 7.2.10
  • dotnet6-build Alpine 3.20, Alpine 3.19, Alpine 3.18 +2 more 6.0.114-r0
  • dotnet7-build Alpine 3.19, Alpine 3.18, Alpine 3.17 7.0.103-r0
  • dotnet6-runtime Alpine 3.20, Alpine 3.19, Alpine 3.18 +2 more 6.0.14-r0
  • dotnet7-runtime Alpine 3.19, Alpine 3.18, Alpine 3.17 7.0.3-r0

alpine advisories ALPINE-CVE-2023-21808

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-21808 updated cvss 7.8

dotnet: Remote code execution via debugging symbols

  • Red Hat Enterprise Linux 8 dotnet, dotnet3.1, dotnet6.0, dotnet7.0, dotnet-host, dotnet-sdk-3.1, +27 more Red Hat Enterprise Linux 9 dotnet6.0, dotnet7.0, dotnet-host, dotnet-sdk-6.0, dotnet-sdk-7.0, dotnet-hostfxr-6.0, +16 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-24-165-04 updated cvss 7.8

Siemens ST7 ScadaConnect

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
20 mo ago

Exploit prediction

1.15% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
GitHub 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
OSV 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
nuget Microsoft.NetCore.App.Runtime.win-arm
>=7.0.0, <7.0.3
>=6.0.0, <6.0.14
7.0.3
6.0.14
nuget Microsoft.NetCore.App.Runtime.win-arm64
>=7.0.0, <7.0.3
>=6.0.0, <6.0.14
7.0.3
6.0.14
nuget Microsoft.NetCore.App.Runtime.win-x64
>=7.0.0, <7.0.3
>=6.0.0, <6.0.14
7.0.3
6.0.14
nuget Microsoft.NetCore.App.Runtime.win-x86
>=7.0.0, <7.0.3
>=6.0.0, <6.0.14
7.0.3
6.0.14
bitnami dotnet
>=6.0.0, <6.0.1
>=7.0.0, <7.0.1
6.0.1
7.0.1
bitnami dotnet-sdk
>=6.0.0, <6.0.1
>=7.0.0, <7.0.1
6.0.1
7.0.1

Affected products

  • Microsoft .NET 6.0
  • Microsoft .NET 7.0
  • Microsoft Microsoft .NET Framework 3.5 and 4.6.2
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8.1
  • Microsoft Microsoft .NET Framework 4.6.2
  • Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
  • Microsoft Microsoft .NET Framework 4.8
  • Microsoft Microsoft Visual Studio 2013 Update 5
  • Microsoft Microsoft Visual Studio 2015 Update 3
  • Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)
  • Microsoft Microsoft Visual Studio 2019 version 16.11 (includes 16.0 - 16.10)
  • Microsoft Microsoft Visual Studio 2022 version 17.0
  • Microsoft Microsoft Visual Studio 2022 version 17.2
  • Microsoft Microsoft Visual Studio 2022 version 17.4
  • Microsoft PowerShell 7.2

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.