SQL-injection | 解决sqlmap不能跑的注入
kandi X-RAY | SQL-injection Summary
kandi X-RAY | SQL-injection Summary
解决sqlmap不能跑的注入
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SQL-injection Examples and Code Snippets
Community Discussions
Trending Discussions on SQL-injection
QUESTION
I'm trying to understand more about SQL injection, so I found this lesson from Red Tiger Labs.
According to the solution, the cat=1
part of the URL is vulnerable to SQL injection.
I can understand that you can append ORDER BY X#
and keep incrementing X to establish the number of columns, which is 4.
However according to the solution, the next step is to do:
cat=1 union select 1,2,3,4 from level1_users #
The table name is provided, so that's ok. But I'm really having trouble understanding the purpose of the UNION. My guess is the underlying code does something like:
SELECT * FROM level1_users where cat=1
Presumably it would expect only 0 or 1 results. Then it prints out some number of columns onto the screen. According to the example, it prints out:
This hackit is cool :)
My cats are sweet.
Miau
3
4
The first three lines were printed out without the extra SQL injection. So what's going on, and what's the significance?
I would not expect the union to do anything, I assume the numbers refer to columns?
...ANSWER
Answered 2022-Feb-11 at 14:07So, I've managed to figure out what's going on here.
cat=1 union select 1,2,3,4 from level1_users #
The select part selects the numbers 1, 2, 3, 4 as columns. You could actually use anything here, like select 'cats', 'fish', 'bread', 42
and sometimes you have to do this as the union select must match the column types in the target table. The level1_users
table is integers (or at least, integers work), hence selecting numbers.
I actually thought it might be selecting columns by their index, because often in sql you can do ORDER BY 1 for example to order by the first column, however that's not the case.
What tripped me up was that this particular SQL injection website dumps the entire contents of the result set to the screen, and I wasn't expecting that. If you think about it though it is looking for a category id and therefore it's not unreasonable to expect it to list everything in that category.
By performing a union it first shows that extra rows will be printed to the screen, and because we've numbered the columns, it shows which columns, columns 3 and 4.
From there it's possible to simply select username and password into those columns (you have to guess the table headers in this instance because although you can normally union onto the db data it has been disabled for this exercise).
QUESTION
I am trying to pass multiple Python variables to an SQL query in pymysql but always receive "TypeError: not all arguments converted during string formatting". For debugging purposes, there are no other records in this table:
...ANSWER
Answered 2022-Feb-02 at 23:09You are missing couple of %s
s. Correct statement:
QUESTION
in my php-script i am executing on a sql-server. Everything works fine, but: I dont only have variable values, but also variable field-names. Therefore I would like to pass the field-names as a parameter for security-reasons.
the sql would be
...ANSWER
Answered 2022-Jan-16 at 23:50You have to whitelist the values of $field and concatenate it into the query:
QUESTION
I have a few HANA queries that rely on PLACEHOLDER
input. The input to this is currently hardcoded which is leading to SQL injection vulnerability being detected by Veracode.
In order to fix that, I am trying to parameterize the value given to PLACEHOLDER
using PreparedStatement
, but getting the below error :
ANSWER
Answered 2021-Dec-02 at 10:27Figured the issue out. It seems, in the new syntax you need to provide the input parameter in single quotes and not in triple single quotes
Works : 'foo'
Doesn't work : '''bar'''
QUESTION
There's this challenge from portswigger: https://portswigger.net/web-security/sql-injection/blind/lab-time-delays
I noticed that these 2 solutions work:
' || pg_sleep(10)--
, ' || (SELECT pg_sleep(10)--
But this doesn't: ' || SELECT pg_sleep(10)--
And my question is what's the different between with and without ()
?
ANSWER
Answered 2021-Sep-24 at 12:08Because This is the syntax of the SQL:
A scalar subquery is an ordinary SELECT query in parentheses that returns exactly one row with one column.
QUESTION
In PHP, the following statement both defines an array and inserts an element into the array:
...ANSWER
Answered 2021-Jul-23 at 11:34$ids[] = $row['id'];
QUESTION
I have a website using PDO for connecting to a MySQL database and i'm trying to improve its security.
After reading this post, i added the line $dbConnection->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
so the connection lines are now like this:
ANSWER
Answered 2021-Jul-18 at 22:14MySQL's prepare()
does not support multi-query. You cannot run multiple statements separated by semicolons when you use prepare.
Reference: https://dev.mysql.com/doc/refman/8.0/en/sql-prepared-statements.html
SQL syntax for prepared statements does not support multi-statements (that is, multiple statements within a single string separated by ; characters).
If you set PDO::ATTR_EMULATE_PREPARES to false (which I agree is a good thing), then you must run each statement individually.
You don't need to use prepare()
& execute()
in your case, since your query has no parameters and you're only using it once anyway.
But there's no good reason to use multi-query anyway, whether you are using prepare or just executing the query directly. It's simpler to run the queries one at a time. Since none of these SQL statements has a result set, you can use PDO::exec().
Here is how I would code this:
QUESTION
I need to make an API request using feign. Method type: POST
; Headers must include Content-Type = text/xml
.
My code:
...ANSWER
Answered 2021-Apr-23 at 21:50The solution was as follows:
Since Content -Type = "text / xml" is required, I need to use JAXBEncoder. In this case, I need to send not a String, but a ChargeRqType - an object that was received using jaxb.
QUESTION
I have trouble figuring out, if JPA for Spring Boot has any build in security mechanisms that prevent SQL-Injection.
If I use the JpaRepository does it produce a preparestatement with the Database, does it have any sort of white/black listing build in or is there even more?
Are all of these feature part of the Spring Boot Security dependency?
...ANSWER
Answered 2021-Mar-22 at 04:54JPA Security is an Access Control Solution for the Java Persistence API (JPA). Its features include:
- High-Performance querying: With JPA Security your access control is performed in the database. You may query the database for all objects of a certain type and will get only the objects you have read access to. This filtering occurs in the database. Unaccessible queried objects will not be loaded into memory.
- Access Control via Configuration: JPA Security enables you to completely remove security-related code from your code-base. All of the access control may be configured via Annotations or XML.
- Support for role-based access control, access control lists (ACLs), and domain-driven access control: With JPA Security you do not have to change your access control paradigm (but maybe you want to when you see the great capability of JPA Security). You even can mix access control paradigms easily.
- Integration for Java EE Security and other frameworks: JPA Security is not designed to replace current security solutions, but to extend them. It integrates smoothly into the security mechanisms of the Java EE Platform but may be used with third-party frameworks like Spring Security or in Java SE, too.
- Easy Extensibility: With the extensibility of JPA Security it is easy to provide your own access control paradigm, access rules storage, or login mechanism.
Refer JPA Security Core for more details.
QUESTION
I'm trying to access entries from the database with variable column names.
I have this table containing vehicles that can belong to one of three categories (car, bike, truck):
vehicle car bike truck Car 1 x Car 2 x Bike 1 x Truck 1 xWith OOP and PDO, I'm trying to access the vehicles that belong to a category. Like so:
User-input:
...ANSWER
Answered 2021-Feb-14 at 19:33Short answer: Yes
Long answer:
Yes you are, because you dont actualy use the user input as an database field they cant manipulate it.
Aslong you doesnt directly put user input into your database you wont get problems with mysql injections.
Many People tell you to use prepared statments at every request, but you only have to use them if you directly use userinput in your querys like a username order an email.
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Install SQL-injection
You can use SQL-injection like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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