Prepare managed child MITM CA env#25888
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Found three policy-boundary blockers and one debug-sandbox integration gap in the child CA materialization path. The first comment includes a directly applicable suggestion; the remaining fixes span APIs or platform-safe file handling, so I described the required patch shape rather than offering an incomplete one-line replacement.
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Re-reviewed the live head specifically for plain-proxy and permission regressions. I found two remaining gaps: one changes shell-snapshot behavior when the proxy runs without MITM, and the other leaves the Windows CA materialization check/open race unresolved. The earlier deny-glob, baseline-root, and debug-sandbox findings look addressed.
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codex/codex-rs/cli/src/debug_sandbox.rs
Line 314 in 511d2b8
Reject legacy Landlock before preparing managed MITM
When the Linux codex sandbox path runs with managed network/MITM enabled and features.use_legacy_landlock = true, this passes the prepared profile with the proxy-dir deny plus active-bundle readable carveback into the legacy Landlock helper. SandboxManager::transform rejects that same combination because legacy Landlock cannot enforce the per-file carveback, so this path should reject it or force bwrap before building helper args instead of launching a helper that fails before the command runs.
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…mitm-command-ca-bundles-restack-20260618
…mitm-command-ca-bundles-restack-20260618
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Closing as superseded by the focused #29013 and #29014 stack. The replacement isolates the persisted MITM private key and preserves file-backed custom CAs present at Codex startup, with zero |
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Why
Managed MITM CA preparation must happen at each sandbox boundary so each command can read only its active generated bundle, never the proxy private key or a bundle generated for another command.
What
codex-sandboxingand the debug-sandbox CLI pathcodex-coreStack
Validation
just test -p codex-sandboxingjust test -p codex-cli debug_sandboxjust test -p codex-network-proxy