fix(setup): checksum-verified just install instead of curl|bash (CWE-494) - #119
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Both just.systems/install.sh | bash fallbacks are replaced with install_just_verified: a pinned just 1.58.0 release binary per platform, fetched over TLS1.2+ into mktemp and sha256-checked before install (ported from hyperpolymath/standards setup.sh 3079bc12; macOS shasum fallback added). Unknown platforms fail rather than guess a target. Verified locally: real download installs just 1.58.0; a tampered digest is rejected; sh -n + shellcheck clean; hypatia scan reports no shell_download_then_run in setup.sh. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QFphKkDVB9pUDSCD4bkz65
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Walkthrough
ChangesVerified just installation
Estimated code review effort: 2 (Simple) | ~15 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant Setup as setup.sh
participant Archive as just release archive
participant Digest as SHA-256 verification
participant Installer as just installer
Setup->>Archive: Download supported release over HTTPS with TLS 1.2
Setup->>Digest: Verify archive against pinned digest
Digest-->>Setup: Confirm digest match
Setup->>Installer: Extract and install just 1.58.0
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches📝 Generate docstrings
🛠️ Fix failing CI checks
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The advertised rsr-template-repo URL no longer exists (setup.sh was removed there in 162b02a), and the pattern is the one this script now refuses to use for just. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QFphKkDVB9pUDSCD4bkz65
![github-advanced-security[bot]](https://avatars.githubusercontent.com/in/57789?s=60&v=4){kind=small}
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| # ── Verified just install ── | ||
| # Replaces `curl https://just.systems/install.sh | bash`: piping a remote script |
![coderabbitai[bot]](https://avatars.githubusercontent.com/in/347564?s=60&v=4){kind=small}
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Inline comments:
Review comments at @setup.sh:
- Around line 179-181: Update install_just to fail if mktemp, tar extraction, or
sudo install fails, while always cleaning up the temporary directory after
extraction or installation attempts and returning the relevant failure status.
Ensure a failed mktemp prevents downloads or extraction from using an empty
path.
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setup.sh
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- GitHub Check: CodeQL
- GitHub Check: semgrep-cloud-platform/scan
- GitHub Check: analyze (actions, none)
- GitHub Check: semgrep-cloud-platform/scan
- GitHub Check: governance / Allowlist Preflight
- GitHub Check: governance / Exemption ratchet
- GitHub Check: governance / Check Workflow Staleness
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- GitHub Check: hypatia / Hypatia Neurosymbolic Analysis
⚠️ CI failures not shown inline (4)
GitHub Actions: Static Analysis Gate / 3_Hypatia neurosymbolic scan.txt: fix(setup): checksum-verified just install instead of curl|bash (CWE-494)
Conclusion: failure
##[group]Run set +e
�[36;1mset +e�[0m
�[36;1mHYPATIA_FORMAT=json "$HOME/hypatia/hypatia-cli.sh" scan . --exit-zero > hypatia-findings.json�[0m
�[36;1mHYP_EXIT=$?�[0m
�[36;1mset -e�[0m
�[36;1m�[0m
�[36;1m# --exit-zero is Hypatia's own documented CI recipe (lib/hypatia/cli.ex),�[0m
�[36;1m# for exactly this case: "use in CI when a downstream step gates on�[0m
�[36;1m# severity counts". Findings go to stdout, the one-line summary to�[0m
�[36;1m# stderr, and the process exits 0 unless the SCANNER itself failed.�[0m
�[36;1m#�[0m
�[36;1m# Do NOT redirect stderr into the payload with `2>&1`: that folds the�[0m
�[36;1m# summary line into the JSON, so every parse fails, the old `[]`�[0m
�[36;1m# fallback substituted a clean result, CRITICAL was always 0, and the�[0m
�[36;1m# gate below could never fire on any input. Keep stderr on the log.�[0m
�[36;1mif [ "$HYP_EXIT" -ne 0 ]; then�[0m
�[36;1m echo "::error::Hypatia scanner execution failed with exit ${HYP_EXIT}"�[0m
GitHub Actions: Static Analysis Gate / Hypatia neurosymbolic scan: fix(setup): checksum-verified just install instead of curl|bash (CWE-494)
Conclusion: failure
##[group]Run set +e
�[36;1mset +e�[0m
�[36;1mHYPATIA_FORMAT=json "$HOME/hypatia/hypatia-cli.sh" scan . --exit-zero > hypatia-findings.json�[0m
�[36;1mHYP_EXIT=$?�[0m
�[36;1mset -e�[0m
�[36;1m�[0m
�[36;1m# --exit-zero is Hypatia's own documented CI recipe (lib/hypatia/cli.ex),�[0m
�[36;1m# for exactly this case: "use in CI when a downstream step gates on�[0m
�[36;1m# severity counts". Findings go to stdout, the one-line summary to�[0m
�[36;1m# stderr, and the process exits 0 unless the SCANNER itself failed.�[0m
�[36;1m#�[0m
�[36;1m# Do NOT redirect stderr into the payload with `2>&1`: that folds the�[0m
�[36;1m# summary line into the JSON, so every parse fails, the old `[]`�[0m
�[36;1m# fallback substituted a clean result, CRITICAL was always 0, and the�[0m
�[36;1m# gate below could never fire on any input. Keep stderr on the log.�[0m
�[36;1mif [ "$HYP_EXIT" -ne 0 ]; then�[0m
�[36;1m echo "::error::Hypatia scanner execution failed with exit ${HYP_EXIT}"�[0m
GitHub Actions: Static Analysis Gate / Hypatia neurosymbolic scan: fix(setup): checksum-verified just install instead of curl|bash (CWE-494)
Conclusion: failure
##[group]Run # Findings carry no `.message` (keys: action,file,line,reason,rule_module,
�[36;1m# Findings carry no `.message` (keys: action,file,line,reason,rule_module,�[0m
�[36;1m# severity,type), so every annotation read "null". `.file` is an absolute�[0m
�[36;1m# runner path, which GitHub cannot anchor to the diff, so it is made�[0m
�[36;1m# workspace-relative here.�[0m
�[36;1mjq -r --arg ws "$GITHUB_WORKSPACE" '.[] | select(.file != null) |�[0m
�[36;1m (.file | ltrimstr($ws + "/")) as $f |�[0m
�[36;1m (.reason // .message // .type // "finding") as $m |�[0m
�[36;1m if .severity == "critical" then�[0m
�[36;1m "::error file=\($f),line=\(.line // 1)::[hypatia] \($m)"�[0m
GitHub Actions: Static Analysis Gate / Hypatia neurosymbolic scan: fix(setup): checksum-verified just install instead of curl|bash (CWE-494)
Conclusion: failure
##[group]Run echo "::error::Hypatia found 1 critical security issue(s) — blocking merge"
🧰 Additional context used
📓 Path-based instructions (2)
Source excerpt: Licence **MPL-2.0** + SPDX header on every file (never AGPL).
📄 CodeRabbit inference engine (CLAUDE.md)
Files:
setup.sh
Source excerpt: SPDX: `MPL-2.0` on all new files.
📄 CodeRabbit inference engine (.github/copilot-instructions.md)
Files:
setup.sh
🪛 GitHub Check: Hypatia
setup.sh
[warning] 130-130: Hypatia content_patterns: download_then_run_shell
download-then-run banned -- verify checksum/signature before execution
🔇 Additional comments (1)
setup.sh (1)
9-9: LGTM!Also applies to: 129-178, 196-197, 208-209
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com> Signed-off-by: Jonathan D.A. Jewell <6759885+hyperpolymath@users.noreply.github.com>
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2 participants
Replaces both
curl -fsSL https://just.systems/install.sh | bashfallbacks insetup.sh(CWE-494, download-then-run) withinstall_just_verified. It downloads a pinned just 1.58.0 release binary for the resolved platform over TLS 1.2+ intomktemp, and checks it against a pinned sha256 before installing. This is ported from hyperpolymath/standardssetup.sh(3079bc12), with ashasum -a 256fallback added for macOS. Unknown platforms fail loudly instead of guessing a target.This removes the finding at source rather than adding it to
.hypatia-ignore.Verified locally
just 1.58.0, and the pinned digest matches.CHECKSUM MISMATCH.sh -nandshellcheck -s share clean (one pre-existing SC1091 info).shell_download_then_runin setup.sh.Context: the rsr-template-repo no longer ships
setup.sh(removed in 162b02a), so this copy is an orphaned descendant.Fixes the Static Analysis Gate half of #117. The Well-Known Standards half is separate.
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