[release/v7.4] Fallback to AppLocker after WldpCanExecuteFile#25229
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TravisEz13 merged 1 commit intoPowerShell:release/v7.4from Apr 4, 2025
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[release/v7.4] Fallback to AppLocker after WldpCanExecuteFile#25229TravisEz13 merged 1 commit intoPowerShell:release/v7.4from
WldpCanExecuteFile#25229TravisEz13 merged 1 commit intoPowerShell:release/v7.4from
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Co-authored-by: Travis Plunk <travis.plunk@microsoft.com>
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Backport #24912
This pull request includes several changes to the
src/System.Management.Automation/security/wldpNativeMethods.csfile to improve the handling of system lockdown policies and file policy enforcement. The changes primarily focus on refining the logic for determining enforcement modes and handling exceptions more effectively.Key changes include:
Improvements to system lockdown policy handling:
GetSystemLockdownPolicymethod to use an out parameter forGetDebugLockdownPolicy.ConvertToModernFileEnforcementto convert legacy enforcement modes to modern file enforcement modes.Enhancements to file policy enforcement:
GetFilePolicyEnforcementmethod to use the newConvertToModernFileEnforcementmethod and added logic to handle different enforcement scenarios more accurately.TryGetWldpCanExecuteFileResultmethod to handle the result ofWldpCanExecuteFileand fallback to legacy APIs if necessary.Exception handling improvements:
GetFilePolicyEnforcementto catch bothDllNotFoundExceptionandEntryPointNotFoundExceptionand log the appropriate events.Additional minor changes:
System.Diagnosticsusing directive for better debugging support.GetDebugLockdownPolicymethod to use an out parameter for modern enforcement. [1] [2] [3]These changes collectively enhance the robustness and accuracy of the system's lockdown policy and file enforcement mechanisms.