While creating a Database an Oracle Intelligent Agent communicates with Oracle Enterprise Manager to pass on information about components such as the database,
the listener, and the server itself. To get data about the database, it needs to connect to the database using some userid. By default, the userid used is DBSNMP.
When the database is created, the password of dbsnmp is also set to dbsnmp. This user has some powerful privileges, such as UNLIMITED TABLESPACE, SELECT ANY DICTIONARY (which allows the user to select from dynamic performance views and data dictionary views), and ANALYZE ANY DICTIONARY (which allows analyze of the system objects). Many intruders use this user and password for back-door entry into the database. Needless to say, this is a huge security hole.
When the database is created, the password of dbsnmp is also set to dbsnmp. This user has some powerful privileges, such as UNLIMITED TABLESPACE, SELECT ANY DICTIONARY (which allows the user to select from dynamic performance views and data dictionary views), and ANALYZE ANY DICTIONARY (which allows analyze of the system objects). Many intruders use this user and password for back-door entry into the database. Needless to say, this is a huge security hole.
OEM will create DBSNMP USER. Even if you drop the user also again it will create when you connected from OEM. The funny thing is it will use system tablespace for DEFAULT and Temp tablespaces.
SQL> conn dbsnmp/dbsnmp@tsm
Connected.
SQL> select * from tab;
TNAME TABTYPE CLUSTERID
------------------------------ ------- ----------
MGMT_SNAPSHOT TABLE
MGMT_SNAPSHOT_SQL TABLE
MGMT_BASELINE TABLE
MGMT_BASELINE_SQL TABLE
MGMT_CAPTURE TABLE
MGMT_CAPTURE_SQL TABLE
MGMT_RESPONSE_CONFIG TABLE
MGMT_LATEST TABLE
MGMT_LATEST_SQL TABLE
MGMT_HISTORY TABLE
MGMT_HISTORY_SQL TABLE
TNAME TABTYPE CLUSTERID
------------------------------ ------- ----------
MGMT_TEMPT_SQL TABLE
MGMT_RESPONSE_BASELINE VIEW
MGMT_BSLN_DATASOURCES TABLE
MGMT_BSLN_BASELINES TABLE
MGMT_BSLN_INTERVALS TABLE
MGMT_BSLN_METRICS TABLE
MGMT_BSLN_STATISTICS TABLE
MGMT_BSLN_THRESHOLD_PARMS TABLE
MGMT_BSLN_RAWDATA TABLE
MGMT_DB_FILE_GTT TABLE
MGMT_DB_SIZE_GTT TABLE
ENJOY:)
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