`fdroid update` writes a status/ directory containing update.json and
running.json, which record the absolute paths of the machine that built the
repo — home directory, username, toolchain locations — and that signing
happened there. My publish script rsynced the whole repo directory, so those
went public and were being served unauthenticated.
That is targeting data for a supply-chain attack against the laptop holding the
Android release key, which is permanent and cannot be rotated without orphaning
every install. fdroid's own deploy command excludes status/; a raw rsync does
not, and I used a raw rsync.
Removed from the live repo and excluded here so it does not come back.
Found by an audit pass, not by anything going wrong — which is the argument for
running them.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
