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[release/10.0] Enable ControlFlowGuard for ANCM native .dll's#63437

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wtgodbe merged 2 commits intorelease/10.0from
wtgodbe/ControlFlowGuard
Aug 26, 2025
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[release/10.0] Enable ControlFlowGuard for ANCM native .dll's#63437
wtgodbe merged 2 commits intorelease/10.0from
wtgodbe/ControlFlowGuard

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@wtgodbe wtgodbe commented Aug 26, 2025

Fixes Binskim alerts

@wtgodbe wtgodbe requested review from Copilot and joperezr August 26, 2025 18:44
@wtgodbe wtgodbe requested a review from a team as a code owner August 26, 2025 18:44
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Pull Request Overview

This PR enables Control Flow Guard (CFG) for AspNetCore Module native DLLs to fix Binskim security alerts. CFG is a Windows security feature that helps prevent exploitation of memory corruption vulnerabilities.

  • Adds the /guard:cf compiler option to enable Control Flow Guard
  • Applied to both common build settings and CustomAction project

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File Description
src/Installers/Windows/AspNetCoreModule-Setup/build/settings/common.props Adds CFG compiler option to common build settings
src/Installers/Windows/AspNetCoreModule-Setup/CustomAction/aspnetcoreCA.vcxproj Adds CFG compiler option to CustomAction project settings

@BrennanConroy
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Idk what these dlls are called, but the ANCM native dlls are in https://github.com/dotnet/aspnetcore/tree/main/src/Servers/IIS/AspNetCoreModuleV2
Should those be updated?

@wtgodbe
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wtgodbe commented Aug 26, 2025

Should those be updated?

Good catch, added it for a few more shipping assemblies (there are alerts filed for OutOfProcess & aspnetcore.dll)

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Thanks for fixing!

cc @ericstj @SamMonoRT

@wtgodbe wtgodbe added the tell-mode Indicates a PR which is being merged during tell-mode label Aug 26, 2025
@wtgodbe wtgodbe merged commit 03e9582 into release/10.0 Aug 26, 2025
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@wtgodbe wtgodbe deleted the wtgodbe/ControlFlowGuard branch August 26, 2025 22:16
@dotnet-policy-service dotnet-policy-service bot added this to the 10.0-rc2 milestone Aug 26, 2025
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wtgodbe commented Aug 26, 2025

Confirmed that /guard:cf is getting passed to the compiler

wtgodbe added a commit that referenced this pull request Aug 27, 2025
[release/10.0] Enable ControlFlowGuard for ANCM native .dll's

Co-authored-by: William Godbe <wigodbe@microsoft.com>
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5 participants