Downgrade system IL impersonation token to high#40447
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Brian-Perkins merged 4 commits intomasterfrom May 7, 2026
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Pull request overview
Note
Copilot was unable to run its full agentic suite in this review.
This PR adjusts duplicated user tokens so that when a duplicated token has System integrity level, it is downgraded to High integrity level to match the VM worker process and avoid access issues on created objects.
Changes:
- Adds
TOKEN_ADJUST_DEFAULTto the duplicated token’s access rights. - Detects System IL on the duplicated token and sets its integrity level to High via
SetTokenInformation(TokenIntegrityLevel).
OneBlue
previously approved these changes
May 7, 2026
benhillis
previously approved these changes
May 7, 2026
benhillis
previously approved these changes
May 7, 2026
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
benhillis
approved these changes
May 7, 2026
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Summary of the Pull Request
Creating objects while impersonating service accounts with an integrity level of 'system' can cause problems because the VM worker process only runs at 'high' IL. Downgrade 'system' to 'high'.
Validation Steps Performed
Manually ran scenarios under NetworkService account.