Difference between revisions of "SQL Injection Cookbook - Oracle"

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(Set operators)
Line 49: Line 49:
 
String concatenation is performed by a double pipe ('''||''').
 
String concatenation is performed by a double pipe ('''||''').
 
   SELECT  
 
   SELECT  
  FirstName || ' ' || LastName
+
    FirstName || ' ' || LastName
 
   FROM
 
   FROM
 
     People
 
     People
Line 78: Line 78:
 
     customers
 
     customers
  
====UNION====
+
'''UNION'''<br>
 
Returns the rows from both queries, removing duplicates
 
Returns the rows from both queries, removing duplicates
 
+
<br>
====UNION ALL====
+
'''UNION ALL'''<br>
 
Returns the rows from both queries, duplicates are not removed.
 
Returns the rows from both queries, duplicates are not removed.
 
+
<br>
 
====INTERSECT====
 
====INTERSECT====
 
Returns the rows that are found in the results of both queries.
 
Returns the rows that are found in the results of both queries.

Revision as of 20:04, 16 January 2007

Contents

Database objects

Tables

List table names

Create a table

List columns for a specific table

View table permissions

Change table permissions

Stored procedures or functions

List stored procedures or functions

Parameters for a stored procedure or function

Source code of a stored procedure or function

Create a stored procedure or function

System data

Users

Identify current user

List of database users

List of database administrators

Database user permissions

Create a new user

Change a user password

Delete a user

Database server

View database server settings

Change database server settings

View database server processes

Kill database server process

Host Operating System

Operating System version

OS environment variables

Execute OS shell commands

Read file contents

Arbitrary file writes

File uploads

Unique database platform features

Queries

Strings

Valid string delimiters

String concatenation

String concatenation is performed by a double pipe (||).

 SELECT 
    FirstName || ' ' || LastName
 FROM
    People

String-based queries with no quote characters

Query syntax

Acceptable whitespace

Tableless queries

Tableless queries aren’t supported in Oracle per se. However, a special table named "Dual" allows for similar functionality. This doesn't help much for filter evasion since it still matches the standard SELECT syntax.

 SELECT
    'This is a string'
 FROM
    Dual

Query comments

Query command delimiters

Set operators

Set operators are used to combine the results from two different queries. The number of columns and order of column types must be identical for both queries. The general syntax is

 SELECT
    fname, lname
 FROM 
    employees
 SET_OPERATOR
 SELECT
    fname, lname
 FROM
    customers

UNION
Returns the rows from both queries, removing duplicates
UNION ALL
Returns the rows from both queries, duplicates are not removed.

INTERSECT

Returns the rows that are found in the results of both queries.

MINUS

Returns only the rows in the first query that are not found in the second query.

Special queries

Single column queries

Single row queries

Functions, etc.

Data type casting

Query output to file

Attacks

Breaking out of a query

WHERE clauses

FROM clauses

Other parts of a SELECT

INSERT statements

UPDATE statements

Timing attacks

SQL Tautologies

A tautology is something that is inherently true. SQL tautologies are used when you want to force a query to return all results, basically ignoring any WHERE conditionals. Simple tautologies like " OR 1=1" are useful, but may be filtered out by some security tools. The table below offers a number of tautologies that filter writers (even on well known commercial tools) may not have considered.

Statement Numeric

(1 = 1)

String

('a' = 'a')

Binary

(0x1 = 0x1)

a = a X X X
a ^= b X X X
a < b X X X
b > a X X X
a <= b X X X
b >= a X X X
a <! b X X X
b >! a X X X
a operator ANY (a, b, c, d)

where operator is any of the first 9 listed comparison operators; for the statement to be true, the operator must return true for a and least one of the items in the list

X X X
a operator SOME (a, b, c, d)

SOME is a synonym of ANY

X X X
a operator ALL (a, b, c, d)

similar to ANY, except that the operator must return true for a and all of the items in the list

X X X
a IN (c, b, a) X X X
a NOT IN (d, c, b) X X X
b BETWEEN a AND c X X X
a NOT BETWEEN c AND d X X X
a LIKE a   X  
a NOT LIKE b   X  

Data exfiltration

E-mail

Web

General network