From 91f3ffc5249eff99c311fb27e7b29a44d9c62be1 Mon Sep 17 00:00:00 2001 From: Noah Misch Date: Mon, 26 Feb 2018 07:39:44 -0800 Subject: Empty search_path in Autovacuum and non-psql/pgbench clients. This makes the client programs behave as documented regardless of the connect-time search_path and regardless of user-created objects. Today, a malicious user with CREATE permission on a search_path schema can take control of certain of these clients' queries and invoke arbitrary SQL functions under the client identity, often a superuser. This is exploitable in the default configuration, where all users have CREATE privilege on schema "public". This changes behavior of user-defined code stored in the database, like pg_index.indexprs and pg_extension_config_dump(). If they reach code bearing unqualified names, "does not exist" or "no schema has been selected to create in" errors might appear. Users may fix such errors by schema-qualifying affected names. After upgrading, consider watching server logs for these errors. The --table arguments of src/bin/scripts clients have been lax; for example, "vacuumdb -Zt pg_am\;CHECKPOINT" performed a checkpoint. That now fails, but for now, "vacuumdb -Zt 'pg_am(amname);CHECKPOINT'" still performs a checkpoint. Back-patch to 9.3 (all supported versions). Reviewed by Tom Lane, though this fix strategy was not his first choice. Reported by Arseniy Sharoglazov. Security: CVE-2018-1058 --- src/bin/scripts/dropdb.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'src/bin/scripts/dropdb.c') diff --git a/src/bin/scripts/dropdb.c b/src/bin/scripts/dropdb.c index c6dc72ef6f6..8809aacf998 100644 --- a/src/bin/scripts/dropdb.c +++ b/src/bin/scripts/dropdb.c @@ -129,7 +129,8 @@ main(int argc, char *argv[]) maintenance_db = "template1"; conn = connectMaintenanceDatabase(maintenance_db, - host, port, username, prompt_password, progname); + host, port, username, prompt_password, + progname, echo); if (echo) printf("%s\n", sql.data); -- cgit v1.2.3