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.NET NuGet

CVE-2023-33170

HIGH

CVE-2023-33170 is a high-severity (CVSS 8.1) CWE-362 vulnerability in Microsoft.AspNetCore.Identity. O3 Security confirms whether CVE-2023-33170 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Microsoft Security Advisory CVE-2023-33170: .NET Security Feature Bypass Vulnerability

Also known asBIT-dotnet-2023-33170BIT-dotnet-sdk-2023-33170GHSA-25c8-p796-jg6r
Published
Jul 11, 2023
Updated
Jul 8, 2026
Affected
26 pkgs
Patched
26 / 26
Exploits
None indexed

Blast Radius

26 pkgs affected
.NETMicrosoft.AspNetCore.Identity.NETMicrosoft.AspNet.Identity.Owin.NETMicrosoft.AspNetCore.App.Runtime.linux-arm.NETMicrosoft.AspNetCore.App.Runtime.linux-arm64.NETMicrosoft.AspNetCore.App.Runtime.linux-musl-arm.NETMicrosoft.AspNetCore.App.Runtime.linux-musl-arm64.NETMicrosoft.AspNetCore.App.Runtime.linux-x64.NETMicrosoft.AspNetCore.App.Runtime.osx-x64+18 more

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects NuGet packages — download data is not available via public APIs for these ecosystems.

Description

ASP.NET and Visual Studio Security Feature Bypass Vulnerability

Affected Packages

26 total 26 fixed
EcosystemPackageVulnerable rangeFix
.NETNuGetMicrosoft.AspNetCore.Identityall versions2.1.39
.NETNuGetMicrosoft.AspNet.Identity.Owinall versions2.2.4
.NETNuGetMicrosoft.AspNetCore.App.Runtime.linux-armall versions6.0.20
.NETNuGetMicrosoft.AspNetCore.App.Runtime.linux-arm64all versions6.0.20
.NETNuGetMicrosoft.AspNetCore.App.Runtime.linux-musl-armall versions6.0.20
.NETNuGetMicrosoft.AspNetCore.App.Runtime.linux-musl-arm64all versions6.0.20

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for Microsoft.AspNetCore.Identity. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update Microsoft.AspNetCore.Identity to 2.1.39 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2023-33170 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether CVE-2023-33170 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to CVE-2023-33170. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

ASP.NET and Visual Studio Security Feature Bypass Vulnerability
O3 Security · Impact-Aware SCA

Is CVE-2023-33170 in your dependencies?

O3 detects CVE-2023-33170 across NuGet dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.