# GHSA-3m2r-q8x3-xmf7: Microsoft made an internal discovery of a security vulnerability in version 2.x of ASP.NET Core where a specially crafted request can cause

> A specially crafted request can cause excess resource consumption in Kestrel, leading to denial of service.

- **Severity:** Not scored
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 16 Oct 2018

## What is GHSA-3m2r-q8x3-xmf7?

GHSA-3m2r-q8x3-xmf7 is a denial of service vulnerability in Microsoft.AspNetCore.All, published on 16 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Microsoft made an internal discovery of a security vulnerability in version 2.x of ASP.NET Core where
a specially crafted request can cause excess resource consumption in Kestrel.

## Which versions are affected by GHSA-3m2r-q8x3-xmf7?

8 open source packages ship an affected version, including Microsoft.AspNetCore.All, Microsoft.AspNetCore.Server.Kestrel.Core and Microsoft.AspNetCore.Server.Kestrel.Transport.Abstractions.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `Microsoft.AspNetCore.All` | NuGet | From 2.0.0 | 2.0.8 |
| `Microsoft.AspNetCore.All` | NuGet | From 2.0.0 | 2.0.8 |
| `Microsoft.AspNetCore.Server.Kestrel.Core` | NuGet | From 2.0.0 | 2.0.3 |
| `Microsoft.AspNetCore.Server.Kestrel.Core` | NuGet | From 2.0.0 | 2.0.3 |
| `Microsoft.AspNetCore.Server.Kestrel.Transport.Abstractions` | NuGet | From 2.0.0 | 2.0.3 |
| `Microsoft.AspNetCore.Server.Kestrel.Transport.Abstractions` | NuGet | From 2.0.0 | 2.0.3 |
| `Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv` | NuGet | From 2.0.0 | 2.0.3 |
| `Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv` | NuGet | From 2.0.0 | 2.0.3 |

## How do I fix GHSA-3m2r-q8x3-xmf7?

Upgrade Microsoft.AspNetCore.All to 2.0.8 or later.

## Is GHSA-3m2r-q8x3-xmf7 being exploited?

There is no known exploitation of GHSA-3m2r-q8x3-xmf7 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for GHSA-3m2r-q8x3-xmf7 and fix it if it is affected.

What it is: GHSA-3m2r-q8x3-xmf7 is a denial of service vulnerability in Microsoft.AspNetCore.All, published on 16 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of GHSA-3m2r-q8x3-xmf7 in the wild and no public exploit code.

Affected packages and fixed versions:
- Microsoft.AspNetCore.All (NuGet): affected from 2.0.0; fixed in 2.0.8
- Microsoft.AspNetCore.All (NuGet): affected from 2.0.0; fixed in 2.0.8
- Microsoft.AspNetCore.Server.Kestrel.Core (NuGet): affected from 2.0.0; fixed in 2.0.3
- Microsoft.AspNetCore.Server.Kestrel.Core (NuGet): affected from 2.0.0; fixed in 2.0.3
- Microsoft.AspNetCore.Server.Kestrel.Transport.Abstractions (NuGet): affected from 2.0.0; fixed in 2.0.3
- Microsoft.AspNetCore.Server.Kestrel.Transport.Abstractions (NuGet): affected from 2.0.0; fixed in 2.0.3
- Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv (NuGet): affected from 2.0.0; fixed in 2.0.3
- Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv (NuGet): affected from 2.0.0; fixed in 2.0.3

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/GHSA-3m2r-q8x3-xmf7/ (Markdown: https://insights.sbomify.com/GHSA-3m2r-q8x3-xmf7/index.md)
```

## Sources

- OSV: https://osv.dev/vulnerability/GHSA-3m2r-q8x3-xmf7

---
From sbomify Insights: https://insights.sbomify.com/GHSA-3m2r-q8x3-xmf7/
Summaries are generated and may contain mistakes; the official description above is the record.