> For the complete documentation index, see [llms.txt](https://cyb3r.gitbook.io/pentestbook/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cyb3r.gitbook.io/pentestbook/courses/api-sec.md).

# API SEC

### 1. API Reconnaissance <a href="#user-content-1-api-reconnaissance" id="user-content-1-api-reconnaissance"></a>

#### Passive Reconnaissance <a href="#user-content-passive-reconnaissance" id="user-content-passive-reconnaissance"></a>

* Google Dorks
* Github Dorks
* Shodan Dorks
* Archive.org

#### Active Reconnaissance <a href="#user-content-active-reconnaissance" id="user-content-active-reconnaissance"></a>

* Gobuster
* Amass

### 2. Endpoint Analysis <a href="#user-content-2-endpoint-analysis" id="user-content-2-endpoint-analysis"></a>

* Postman - intercept API requests
* Mitmweb
* mitmproxy2swagger -i flows-2 -o spec.yml -p [http://crapi.apisec.ai](http://crapi.apisec.ai/) -f flow
* mitmproxy2swagger -i flows-2 -o spec.yml -p [http://crapi.apisec.ai](http://crapi.apisec.ai/) -f flow --examples
* editor.swagger.io

### 3. Scanning APIs <a href="#user-content-3-scanning-apis" id="user-content-3-scanning-apis"></a>

* OWASP ZAP
  * Import OpenAPI definition
  * Automated scanner - Manual Explore

### 4. API Authentication Attacks <a href="#user-content-4-api-authentication-attacks" id="user-content-4-api-authentication-attacks"></a>

* sequencer: analyse the randomness of tokens
* jwt\_tool : <https://exploit-notes.hdks.org/exploit/web/jwt-pentesting/> , Portswigger
* crunch 5 5 > keys

### 5. Exploiting API Authorization <a href="#user-content-5-exploiting-api-authorization" id="user-content-5-exploiting-api-authorization"></a>

#### Broken Object Level Authorization (BOLA) <a href="#user-content-broken-object-level-authorization-bola" id="user-content-broken-object-level-authorization-bola"></a>

* Search for IDs in URL and body parameters

#### Broken Function Level Authorization (BFLA) <a href="#user-content-broken-function-level-authorization-bfla" id="user-content-broken-function-level-authorization-bfla"></a>

* Change IDs in CRUD request

### 6. Improper Assets Management <a href="#user-content-6-improper-assets-management" id="user-content-6-improper-assets-management"></a>

* Check for old versions of the API : maybe it still contain old vulnerabilities

### 7. Mass Assignment <a href="#user-content-7-mass-assignment" id="user-content-7-mass-assignment"></a>

* Overwrite object properties
* Add parameters to the user registration process to escalate privilege


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