HTTP Request Smuggling Affecting dotnet-hostfxr-8.0-debuginfo package, versions <0:8.0.21-1.amzn2023.0.1


Severity

Recommended
critical

Based on Amazon Linux security rating.

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
1.68% (83rd percentile)

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  • Snyk IDSNYK-AMZN2023-DOTNETHOSTFXR80DEBUGINFO-13709898
  • published24 Oct 2025
  • disclosed14 Oct 2025

Introduced: 14 Oct 2025

CVE-2025-55315  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 dotnet-hostfxr-8.0-debuginfo to version 0:8.0.21-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2025-1230.

NVD Description

Note: Versions mentioned in the description apply only to the upstream dotnet-hostfxr-8.0-debuginfo package and not the dotnet-hostfxr-8.0-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.

CVSS Base Scores

version 3.1