PL-240 Add harden-host.sh script#8
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Actionable comments posted: 1
🧹 Nitpick comments (3)
harden-host.sh (3)
54-60: 📐 Maintainability & Code Quality | 🔵 Trivial | 💤 Low value
eval "$@"(SC2294) is acceptable here, but a brief note helps.Shellcheck flags
evalnegating array benefits, but it's effectively a false positive:runis always invoked with a single command string that intentionally contains redirections and||fallbacks, which requireeval(orbash -c). Since the argument is always one string, prefereval "$*"to make the intent explicit and silence the warning.♻️ Optional tweak
else - eval "$@" + eval "$*" fi🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@harden-host.sh` around lines 54 - 60, The run function currently uses eval "$@" which triggers a shellcheck SC2294 warning. Since the run function is always invoked with a single command string that intentionally contains redirections and logical operators (which require eval to process), change the eval "$@" call to eval "$*" to make the intent explicit and silence the shellcheck warning while maintaining the same functionality.Source: Linters/SAST tools
107-110: 🩺 Stability & Availability | 🔵 Trivial | ⚡ Quick winInconsistent error handling can abort hardening midway.
Under
set -e, these firewall commands (and several unguardeddefaults writecalls in Sections D–G) have no|| true, unlike most other steps. A single non-zero exit (e.g.,socketfilterfwreturning an error) will terminate the script and skip all remaining sections, leaving the host partially hardened with no summary of what failed. Consider either making the script best-effort consistently (|| true/ collect failures) or intentionally fail-fast everywhere.♻️ Example: guard firewall calls consistently
-run "$FW --setglobalstate on" -run "$FW --setstealthmode on" -run "$FW --setallowsigned on" -run "$FW --setallowsignedapp on" +run "$FW --setglobalstate on 2>/dev/null || warn 'failed to set firewall global state'" +run "$FW --setstealthmode on 2>/dev/null || warn 'failed to set stealth mode'" +run "$FW --setallowsigned on 2>/dev/null || true" +run "$FW --setallowsignedapp on 2>/dev/null || true"🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@harden-host.sh` around lines 107 - 110, The firewall configuration commands (using the $FW variable) and unguarded defaults write calls in Sections D–G lack consistent error handling under set -e, which causes the script to abort midway on any non-zero exit and skip remaining hardening sections. Add error handling (either || true for best-effort execution or collect errors for reporting) to the firewall commands around lines 107-110 (run "$FW --setglobalstate on", run "$FW --setstealthmode on", run "$FW --setallowsigned on", and run "$FW --setallowsignedapp on") and the unguarded defaults write calls throughout Sections D–G to match the error-handling pattern used elsewhere in the script, ensuring partial hardening doesn't occur silently.
41-41: 📐 Maintainability & Code Quality | 🔵 Trivial | 💤 Low value
--helpprints the shebang and every comment line, not just usage.
grep '^#' "$0"matches the shebang (#!/usr/bin/env bash→ rendered as!/usr/bin/env bash) and the# ----section dividers, producing noisy help output. Consider scoping to the header block (e.g., stop at the first non-comment line) or printing a dedicated usage function.🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the rest with a brief reason, keep changes minimal, and validate. In `@harden-host.sh` at line 41, The `--help` option handler uses `grep '^#' "$0"` which matches all lines starting with `#`, including the shebang and section dividers like `# ----`, producing noisy output. To fix this, modify the help option case in the `-h|--help` pattern to either scope the grep output to only the header comment block (stopping at the first non-comment line after the shebang), or replace it with a dedicated usage function that prints only the intended help documentation without section dividers and metadata comments.
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@harden-host.sh`:
- Around line 154-155: The screensaver password settings commands using
`defaults -currentHost write com.apple.screensaver askForPassword` and `defaults
-currentHost write com.apple.screensaver askForPasswordDelay` are running under
sudo, which targets root's preferences instead of the actual logged-in user's
preferences and won't take effect on modern macOS. Remove or comment out these
two lines and instead implement these screensaver security settings through MDM
or configuration profiles, which is the authoritative method for enforcing such
security-sensitive settings on modern macOS systems as noted in the script
header.
---
Nitpick comments:
In `@harden-host.sh`:
- Around line 54-60: The run function currently uses eval "$@" which triggers a
shellcheck SC2294 warning. Since the run function is always invoked with a
single command string that intentionally contains redirections and logical
operators (which require eval to process), change the eval "$@" call to eval
"$*" to make the intent explicit and silence the shellcheck warning while
maintaining the same functionality.
- Around line 107-110: The firewall configuration commands (using the $FW
variable) and unguarded defaults write calls in Sections D–G lack consistent
error handling under set -e, which causes the script to abort midway on any
non-zero exit and skip remaining hardening sections. Add error handling (either
|| true for best-effort execution or collect errors for reporting) to the
firewall commands around lines 107-110 (run "$FW --setglobalstate on", run "$FW
--setstealthmode on", run "$FW --setallowsigned on", and run "$FW
--setallowsignedapp on") and the unguarded defaults write calls throughout
Sections D–G to match the error-handling pattern used elsewhere in the script,
ensuring partial hardening doesn't occur silently.
- Line 41: The `--help` option handler uses `grep '^#' "$0"` which matches all
lines starting with `#`, including the shebang and section dividers like `#
----`, producing noisy output. To fix this, modify the help option case in the
`-h|--help` pattern to either scope the grep output to only the header comment
block (stopping at the first non-comment line after the shebang), or replace it
with a dedicated usage function that prints only the intended help documentation
without section dividers and metadata comments.
🪄 Autofix (Beta)
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
…nalytics daemons, ad tracking, Siri/AI agents, telemetry sinkhole)
2 participants
Summary by CodeRabbit
Release Notes