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{Core} Fix potential command injection#32885

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necusjz:fix-command-injection
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{Core} Fix potential command injection#32885
necusjz wants to merge 3 commits intoAzure:devfrom
necusjz:fix-command-injection

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@necusjz necusjz commented Mar 3, 2026

Related command

Description

IcM: https://portal.microsofticm.com/imp/v5/incidents/details/31000000548908/summary

Testing Guide

History Notes

[Component Name 1] BREAKING CHANGE: az command a: Make some customer-facing breaking change
[Component Name 2] az command b: Add some customer-facing feature


This checklist is used to make sure that common guidelines for a pull request are followed.

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azure-client-tools-bot-prd bot commented Mar 3, 2026

️✔️AzureCLI-BreakingChangeTest
️✔️Non Breaking Changes

@necusjz necusjz self-assigned this Mar 3, 2026
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The git hooks are available for azure-cli and azure-cli-extensions repos. They could help you run required checks before creating the PR.

Please sync the latest code with latest dev branch (for azure-cli) or main branch (for azure-cli-extensions).
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yonzhan commented Mar 3, 2026

Thank you for your contribution! We will review the pull request and get back to you soon.

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Pull request overview

This PR updates the WSL-specific browser-launching logic in azure-cli-core to mitigate potential command injection when invoking powershell.exe from open_page_in_browser.

Changes:

  • Adjusts the powershell.exe -Command Start-Process ... invocation to avoid interpolating the URL into a single command string.

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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
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I think this will not work because for example:

Start-Process "https://x.com/$(whoami)"

will evaluate to $(whoami)

I believe we should do

safe_url = url.replace("'", "''")
return subprocess.Popen(
    ['powershell.exe', '-NoProfile', '-Command', "Start-Process'{}'".format(safe_url)]).wait()
)

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necusjz commented Mar 3, 2026

I think this will not work because for example:

Start-Process "https://x.com/$(whoami)"

will evaluate to $(whoami)

I believe we should do

safe_url = url.replace("'", "''")
return subprocess.Popen(
    ['powershell.exe', '-NoProfile', '-Command', "Start-Process'{}'".format(safe_url)]).wait()
)

When user's input url is "https://x.com/$(whoami)", the actual command from my change is already Start-Process -FilePath '"https://x.com/$(whoami)"'.

I.e, it won't recognize double quotation marks as a type of PowerShell syntax.

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