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feat(web): harden login gate — throttle, scoped TLS, token-derived seal key

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Remediates the two web-console residuals from the 2026-07-05 posture audit:

- Brute-force throttle (loginThrottle.ts): per-IP exponential backoff
  after 5 free attempts, plus a global floor for spread-out floods, keyed
  on the socket peer IP (not spoofable X-Forwarded-For) with a size-capped
  map. The constant-time compare already stopped the timing leak; this
  bounds guess *volume* against a by-design LAN-exposed console.
- Session seal key now derives from the high-entropy mgmt token instead of
  the low-entropy login password, so a captured cookie is no longer an
  offline password oracle. Falls back to the password only when no token
  is configured (dev/local). Rotating the token now invalidates sessions.
- Replace the process-wide NODE_TLS_REJECT_UNAUTHORIZED=0 with per-request
  Bun TLS scoped to the loopback proxy hop; a non-loopback mgmt URL now
  verifies normally. Dropped the env var from the systemd unit, Steam Deck
  installer, Windows run scripts, env examples, and web README.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Enrico Bühler
2026-07-06 07:28:39 +02:00
parent ab56536842
commit bda5556d37
11 changed files with 204 additions and 34 deletions
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scripts/steamdeck/install.sh
+1 -1
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@@ -208,7 +208,7 @@ Description=punktfunk management web console
After=punktfunk-host.service
[Service]
ExecStart=$DISTROBOX enter $BOX -- bash -lc 'cd $SRC/web; set -a; . $CONFIG/mgmt-token; . $CONFIG/web.env; set +a; export PUNKTFUNK_MGMT_URL=https://127.0.0.1:$MGMT_PORT NODE_TLS_REJECT_UNAUTHORIZED=0 PORT=$WEB_PORT HOST=0.0.0.0 NITRO_PORT=$WEB_PORT NITRO_HOST=0.0.0.0 PUNKTFUNK_UI_TLS_CERT=$CONFIG/cert.pem PUNKTFUNK_UI_TLS_KEY=$CONFIG/key.pem PUNKTFUNK_UI_SECURE=1; exec bun .output/server/index.mjs'
ExecStart=$DISTROBOX enter $BOX -- bash -lc 'cd $SRC/web; set -a; . $CONFIG/mgmt-token; . $CONFIG/web.env; set +a; export PUNKTFUNK_MGMT_URL=https://127.0.0.1:$MGMT_PORT PORT=$WEB_PORT HOST=0.0.0.0 NITRO_PORT=$WEB_PORT NITRO_HOST=0.0.0.0 PUNKTFUNK_UI_TLS_CERT=$CONFIG/cert.pem PUNKTFUNK_UI_TLS_KEY=$CONFIG/key.pem PUNKTFUNK_UI_SECURE=1; exec bun .output/server/index.mjs'
Restart=on-failure
RestartSec=3