dbcve.org
.net FrameworkApplication · Microsoft

CVE-2023-29331

HIGH · 7.5 CVSS v3.1 Published 2023-06-14
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
.NET, .NET Framework, and Visual Studio Denial of Service Vulnerability

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis
How this class of weakness works · CWE-400

A single request can consume unbounded CPU, memory, or connections, so a modest amount of malicious traffic exhausts the service. The result is denial of service for everyone else. Remediation is enforcing limits, quotas, and timeouts on what any one request can use.

General guidance for the uncontrolled resource consumption class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
.net FrameworkApplication
Affected:= 4.8= 4.6.2= 4.7= 4.7.1= 4.7.2= 3.5.1= 3.5= 4.8.1= 3.0= 2.0
.netApplication
Affected:= 6.0.0= 7.0.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Patch available Apply the vendor patch
Vendor patch msrc.microsoft.com →
Recommended fix Moderate confidence

For .NET 6.0.x: upgrade to .NET 6.0.18 or later | For .NET 7.0.x: upgrade to .NET 7.0.7 or later | For .NET Framework: install the relevant Windows Security Update (KB5028929 or subsequent)

  1. Check for available Windows Updates by going to Settings > Update & Security > Windows Update and clicking 'Check for updates'
  2. Alternatively, download the security update from the Microsoft Update Catalog at https://www.catalog.update.microsoft.com/
  3. Search for CVE-2023-29331 or the specific KB article number provided in the MSRC advisory
  4. Install the appropriate update for your .NET or .NET Framework version
  5. Restart the affected system if prompted
  6. Verify the update was installed by checking 'View installed updates' in Windows Control Panel
Caveat Microsoft security updates typically have minimal breaking changes; however, test in non-production environment before deploying widely

Generated from the published advisory — verify against the referenced sources before acting.

We can apply and verify the patch for your build — typical engagement from $1,950. Get the patch applied

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-29331 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data