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fix(security): eliminate safeBins file-existence oracle

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Peter Steinberger
2026-02-19 14:14:46 +01:00
parent 1316e57403
commit bafdbb6f11
5 changed files with 350 additions and 95 deletions
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docs/tools/exec-approvals.md
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@@ -124,6 +124,10 @@ are treated as allowlisted on nodes (macOS node or headless node host). This use
`tools.exec.safeBins` defines a small list of **stdin-only** binaries (for example `jq`)
that can run in allowlist mode **without** explicit allowlist entries. Safe bins reject
positional file args and path-like tokens, so they can only operate on the incoming stream.
Validation is deterministic from argv shape only (no host filesystem existence checks), which
prevents file-existence oracle behavior from allow/deny differences.
File-oriented options are denied for default safe bins (for example `sort -o`, `sort --output`,
`sort --files0-from`, `wc --files0-from`, `jq -f/--from-file`, `grep -f/--file`).
Safe bins also enforce explicit per-binary flag policy for options that break stdin-only
behavior (for example `sort -o/--output` and grep recursive flags).
Safe bins also force argv tokens to be treated as **literal text** at execution time (no globbing