Use value of scram_iterations in mock_scram_secret(). Presently, mock_scram_secret() always uses SCRAM_SHA_256_DEFAULT_ITERATIONS, which poses an observable response discrepancy hazard when scram_iterations is set to something else. To fix, use the value of the configuration parameter instead, and document that unauthenticated users can discover the existence of roles with passwords created with different iteration counts.
Reported-by: Radim Marek <[email protected]> Author: Nathan Bossart <[email protected]> Reviewed-by: Michael Paquier <[email protected]> Reviewed-by: Heikki Linnakangas <[email protected]> Reviewed-by: Jacob Champion <[email protected]> Security: CVE-2026-14672 Backpatch-through: 16 Branch ------ REL_18_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/822143c4d1dce62a43b98341eacbd4429eca7e59 Author: Nathan Bossart <[email protected]> Modified Files -------------- doc/src/sgml/config.sgml | 13 +++++++++++++ src/backend/libpq/auth-scram.c | 2 +- 2 files changed, 14 insertions(+), 1 deletion(-)
