Skip to content

Record D-9: owner passwords reach PostgreSQL only as a SCRAM verifier #155

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
shipmill-romamo merged 1 commit into from
Oct 30, 2026
Merged

Record D-9: owner passwords reach PostgreSQL only as a SCRAM verifier #155

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 8 additions & 0 deletions docs/decisions.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -67,3 +67,11 @@ entry that supersedes it, never by editing an old one.
- Why: All three come from the model's output, which can quote host output; structured arguments can't be cut and stay meaningful, so refusing keeps steps[] a true account of what ran
- Applies to: sdk/src/cloudfall/investigation.py, config/schemas/v1/agent-investigation.schema.json
- Enforced by: review

## D-9: Owner passwords reach PostgreSQL only as a SCRAM verifier

- Decided: 2026-10-30, in cloudfall-dev/cloudfall#140
- Rule: Cloudfall sets a PostgreSQL role's password only with a SCRAM-SHA-256 verifier computed on the controller; the plaintext password is never staged on the host and never sent to the server, so it can't reach the PostgreSQL log or pg_stat_activity
- Why: psql substitutes a variable into the statement text, so ALTER ROLE ... PASSWORD with the plaintext puts the password in the server's log under log_statement ddl or all, or on a failing statement; PostgreSQL stores a pre-hashed verifier as it is
- Applies to: engine/ansible/roles/cloudfall_postgresql/tasks/owner_password.yml, sdk/src/cloudfall/secrets.py, engine/src/cloudfall_engine/cli.py
- Enforced by: a regression test that the staged file holds a verifier and never the password
Loading