CVE-2023-21808: .NET and Visual Studio Remote Code Execution Vulnerability

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• microsoft .net6.0.0
• microsoft .net7.0.0
• microsoft .net framework3.5
• microsoft .net framework4.6.2
• microsoft .net framework4.7
• microsoft .net framework4.7.1
• microsoft .net framework4.7.2
• microsoft .net framework4.8
• microsoft .net framework4.8.1
• microsoft visual studio 201715.0 and later · before 15.9.51
• microsoft visual studio 201916.0 and later · before 16.11.24
• microsoft visual studio 202217.0
• microsoft visual studio 202217.2
• microsoft visual studio 202217.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.

• Microsoft .NET 6.0

  • 6.0.0 and later · before 6.0.14affected

• Microsoft .NET 7.0

  • 7.0.0 and later · before 7.0.3affected

• Microsoft Microsoft .NET Framework 3.5 and 4.6.2

  • 4.7.0 and later · before 10.0.10240.19747affected

• Microsoft Microsoft .NET Framework 3.5 AND 4.7.2

  • 4.7.0 and later · before 10.0.04038.03affected

• Microsoft Microsoft .NET Framework 3.5 AND 4.8

  • 4.8.0 and later · before 10.0.04614.06affected

• Microsoft Microsoft .NET Framework 3.5 AND 4.8.1

  • 4.8.1 and later · before 10.0.09139.02affected

• Microsoft Microsoft .NET Framework 4.6.2

  • 4.7.0 and later · before 4.7.04038.06affected

• Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2

  • 4.7.0 and later · before 4.7.04614.08affected

• Microsoft Microsoft .NET Framework 4.8

  • 4.8.0 and later · before 4.8.04614.05affected

• Microsoft Microsoft Visual Studio 2013 Update 5

  • 12.0.0 and later · before 12.0.40700.0affected

• Microsoft Microsoft Visual Studio 2015 Update 3

  • 14.0.0 and later · before 14.0.27555.0affected

• Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)

  • 15.9.0 and later · before 15.9.52affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2023-38180.NET and Visual Studio Denial of Service VulnerabilityKEV
  64This week
• CVE-2023-38171Microsoft QUIC Denial of Service Vulnerability
  51Plan
• CVE-2021-26701.NET Core Remote Code Execution Vulnerability
  41Plan

Published before and after this one in the same product

• ← EarlierCVE-2022-41032Oct 11, 2022 · NuGet Client Elevation of Privilege Vulnerability
  31Monitor
• ← EarlierCVE-2023-21538Jan 10, 2023 · .NET Denial of Service Vulnerability
  31Monitor
• Later →CVE-2023-28260Apr 11, 2023 · .NET DLL Hijacking Remote Code Execution Vulnerability
  31Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.