security(caddy): add Permissions-Policy header

Adds `Permissions-Policy: camera=(), microphone=(), geolocation=()` to
the shared (security_headers) snippet, so both archiv vhosts and the
git vhost deny browser APIs the app does not use. Reduces blast radius
of an XSS landing in a privileged origin.

The deploy smoke steps in nightly.yml and release.yml gain a matching
assertion against the canonical header value, so a future Caddyfile
edit that drops or loosens the header (e.g. `camera=(self)`) fails the
deploy instead of regressing silently.

`caddy validate` against caddy:2 passes; both workflow YAMLs parse.
Addresses @nora's round-2 suggestion on PR #499 — "lower-impact than
CSP but nearly free".

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Marcel
2026-05-11 14:06:13 +02:00
parent 8fcf653cb0
commit 09680557ef
3 changed files with 14 additions and 0 deletions

View File

@@ -112,6 +112,11 @@ jobs:
# fail this check rather than pass it silently.
curl -fsS $RESOLVE --max-time 10 -I "$URL/" \
| grep -Eqi 'strict-transport-security:[[:space:]]*max-age=31536000.*includeSubDomains.*preload'
# Permissions-Policy denies APIs the app does not use (camera,
# microphone, geolocation). A regression that loosens or drops the
# header now fails the smoke step.
curl -fsS $RESOLVE --max-time 10 -I "$URL/" \
| grep -Eqi 'permissions-policy:[[:space:]]*camera=\(\),[[:space:]]*microphone=\(\),[[:space:]]*geolocation=\(\)'
status=$(curl -s $RESOLVE -o /dev/null -w "%{http_code}" --max-time 10 "$URL/actuator/health")
[ "$status" = "404" ] || { echo "expected 404 from /actuator/health, got $status"; exit 1; }
echo "All smoke checks passed"

View File

@@ -106,6 +106,11 @@ jobs:
# fail this check rather than pass it silently.
curl -fsS $RESOLVE --max-time 10 -I "$URL/" \
| grep -Eqi 'strict-transport-security:[[:space:]]*max-age=31536000.*includeSubDomains.*preload'
# Permissions-Policy denies APIs the app does not use (camera,
# microphone, geolocation). A regression that loosens or drops the
# header now fails the smoke step.
curl -fsS $RESOLVE --max-time 10 -I "$URL/" \
| grep -Eqi 'permissions-policy:[[:space:]]*camera=\(\),[[:space:]]*microphone=\(\),[[:space:]]*geolocation=\(\)'
status=$(curl -s $RESOLVE -o /dev/null -w "%{http_code}" --max-time 10 "$URL/actuator/health")
[ "$status" = "404" ] || { echo "expected 404 from /actuator/health, got $status"; exit 1; }
echo "All smoke checks passed"