fix(subprocess): resolve executables against PATH not cwd on Windows; reject %VAR% paths - #1905
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fix(subprocess): resolve executables against PATH not cwd on Windows; reject %VAR% paths#1905iankhou wants to merge 2 commits into
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…s; reject %VAR% paths Two Windows-specific hardening fixes to the shared subprocess module, plus a test that actually exercises the .cmd path. 1. resolveExecutable(): on Windows a bare program name spawned without a shell is searched for in the cwd *before* PATH, so a file planted in a handed-over cloud assembly (e.g. docker.bat) could shadow the real binary. run()/runSync() now resolve the executable to an absolute PATH hit up front and refuse a name that is not on PATH rather than let the cwd satisfy it. POSIX is unchanged (execvp already searches PATH only); explicit paths are honored verbatim. 2. quoteShellPart() (toolkit-lib): cmd.exe expands %VAR% even inside double quotes and a `cmd /c` line cannot reliably escape a percent, so a discovered path carrying a %...% reference is now refused loudly instead of being silently rewritten. 3. Adds a Windows-only test that runs a real .cmd shim with hostile arguments — the one path where cross-spawn's cmd.exe escaping is exercised (a plain .exe never is). NOTE: items 1 and 3 change Windows spawn behavior and must be validated by the Windows integ tests; the resolveExecutable logic is unit-tested cross-platform via a `platform` parameter.
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Requires windows integ test verification
Follow-up to #1763 / #1849. Two Windows-specific hardening fixes to the shared subprocess module, plus a test that exercises the
.cmdpath.Summary
resolveExecutable()— on Windows a bare program name spawned without a shell is searched for in the working directory before PATH, so a file planted in a handed-over cloud assembly (e.g.docker.bat) could shadow the real binary.run()/runSync()now resolve the executable to an absolute PATH hit up front and refuse a name that is not on PATH rather than let the cwd satisfy it. POSIX is unchanged (execvp already searches PATH only); an explicit path (absolute or containing a separator) is honored verbatim.quoteShellPart()(toolkit-lib) — cmd.exe expands%VAR%even inside double quotes, and acmd /ccommand line cannot reliably escape a percent (doubling only works in batch files). A discovered path carrying a%...%reference is now refused loudly instead of being silently rewritten (an env var spliced into the path).A Windows-only test that runs a
.cmdshim with hostile arguments — the one path where cross-spawn's cmd.exe escaping is exercised (a plain.exe, as in every existing test, never is).Testing
resolveExecutable.cmdhostile-args test that will be run with the Windows integ workflow.%VAR%detection was verified in isolation;environment.test.tsruns in CI's Linux jest.Checklist
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