postgres

Commit Graph

Author	SHA1	Message	Date
Noah Misch	681d9e4621	Replace last PushOverrideSearchPath() call with set_config_option(). The two methods don't cooperate, so set_config_option("search_path", ...) has been ineffective under non-empty overrideStack. This defect enabled an attacker having database-level CREATE privilege to execute arbitrary code as the bootstrap superuser. While that particular attack requires v13+ for the trusted extension attribute, other attacks are feasible in all supported versions. Standardize on the combination of NewGUCNestLevel() and set_config_option("search_path", ...). It is newer than PushOverrideSearchPath(), more-prevalent, and has no known disadvantages. The "override" mechanism remains for now, for compatibility with out-of-tree code. Users should update such code, which likely suffers from the same sort of vulnerability closed here. Back-patch to v11 (all supported versions). Alexander Lakhin. Reported by Alexander Lakhin. Security: CVE-2023-2454	3 years ago

Author

SHA1

Message

Date

Noah Misch

681d9e4621

Replace last PushOverrideSearchPath() call with set_config_option().

The two methods don't cooperate, so set_config_option("search_path",
...) has been ineffective under non-empty overrideStack.  This defect
enabled an attacker having database-level CREATE privilege to execute
arbitrary code as the bootstrap superuser.  While that particular attack
requires v13+ for the trusted extension attribute, other attacks are
feasible in all supported versions.

Standardize on the combination of NewGUCNestLevel() and
set_config_option("search_path", ...).  It is newer than
PushOverrideSearchPath(), more-prevalent, and has no known
disadvantages.  The "override" mechanism remains for now, for
compatibility with out-of-tree code.  Users should update such code,
which likely suffers from the same sort of vulnerability closed here.
Back-patch to v11 (all supported versions).

Alexander Lakhin.  Reported by Alexander Lakhin.

Security: CVE-2023-2454

3 years ago

1 Commits (4bea91f21f61d01bd40a4191a4a8c82d0959fffe)