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Make REPLICATION privilege checks test current user not authenticated user.

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The pg_start_backup() and pg_stop_backup() functions checked the privileges
of the initially-authenticated user rather than the current user, which is
wrong.  For example, a user-defined index function could successfully call
these functions when executed by ANALYZE within autovacuum.  This could
allow an attacker with valid but low-privilege database access to interfere
with creation of routine backups.  Reported and fixed by Noah Misch.

Security: CVE-2013-1901
This commit is contained in:
Tom Lane
2013-04-01 13:09:24 -04:00
parent 85079078ac
commit ce9ab88981
4 changed files with 7 additions and 7 deletions
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src/include/miscadmin.h
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@@ -439,7 +439,7 @@ extern void ValidatePgVersion(const char *path);
extern void process_shared_preload_libraries(void);
extern void process_local_preload_libraries(void);
extern void pg_bindtextdomain(const char *domain);
extern bool is_authenticated_user_replication_role(void);
extern bool has_rolreplication(Oid roleid);
/* in access/transam/xlog.c */
extern bool BackupInProgress(void);