reachableceo
ae1344c57e
Addresses C-01, C-03, C-04, M-03, M-06, L-01, L-05, L-07. Changes: - luks-kdf-configure.sh: Auto-attempt Argon2id conversion during installation instead of just creating a manual helper (C-01) - run.sh: Replace --privileged with fine-grained capabilities (SYS_ADMIN, MKNOD, NET_ADMIN, SYS_CHROOT, SETFCAP) (C-03) - run.sh: Restrict SB key directory to mode 700 and key files to mode 600 (C-04) - security-hardening.sh: Add PAM enforcement via common-password with enforce_for_root (M-03) - security-hardening.sh: Initialize AIDE database and create daily cron job for integrity checks (M-06) - sudo-hardening.sh: Use atomic install -m 600 instead of touch+chmod to avoid race condition (L-07) - preseed.cfg: Disable direct root login (L-01) - run.sh: Comment explaining KNEL_BUILD_MODE cannot be env-spoofed since it's set from command argument (L-05) All tests pass. Zero shellcheck warnings. STATUS.md updated with 22/28 findings resolved. 💘 Generated with Crush Assisted-by: GLM-5.1 via Crush <crush@charm.land>
60 lines
1.9 KiB
Bash
Executable File
60 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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# Sudo hardening - PRD FR-007 Access Control Layer
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# Reference: CIS Benchmark 5.4, NIST SP 800-53 AC-6
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set -euo pipefail
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echo "Configuring sudo access controls..."
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# Create sudoers configuration for restricted access
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mkdir -p /etc/sudoers.d
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chmod 750 /etc/sudoers.d
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# Default sudoers hardening
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cat >/etc/sudoers.d/99-knel-hardening <<'EOF'
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# KNEL-Football Sudo Configuration
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# Reference: PRD FR-007, CIS Benchmark 5.4, NIST SP 800-53 AC-6
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# Lecture user on first sudo use
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Defaults lecture = always
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Defaults lecture_file = /etc/sudo.lecture
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# Logging and timeout
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Defaults logfile = "/var/log/sudo.log"
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Defaults log_input
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Defaults log_output
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Defaults timestamp_timeout = 15
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# Restrict which environment variables are preserved
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Defaults env_reset
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Defaults env_delete += "HOME"
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Defaults secure_path = /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
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# football user can run specific admin commands
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football ALL=(root) /usr/local/bin/apply-vpn-config.sh, /usr/local/bin/convert-luks-kdf.sh, /usr/bin/systemctl restart nftables, /usr/bin/systemctl restart wg-quick@wg0, /usr/local/bin/check-encryption.sh
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# Root can run anything (standard)
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root ALL=(ALL:ALL) ALL
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EOF
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chmod 440 /etc/sudoers.d/99-knel-hardening
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# Create sudo lecture file
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cat >/etc/sudo.lecture <<'EOF'
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====================================================================
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KNEL-Football Secure OS - Privileged Access Warning
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====================================================================
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You are about to execute a command with elevated privileges.
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All sudo commands are logged and audited.
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Unauthorized use of privileged access is a security violation.
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If you did not intend to run a privileged command, press Ctrl+C now.
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====================================================================
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EOF
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# Ensure sudo.log exists with correct permissions (atomic create)
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install -m 600 /dev/null /var/log/sudo.log 2>/dev/null || true
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echo "Sudo hardening completed."
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