mirror of
https://github.com/carlospolop/hacktricks
synced 2024-11-16 01:38:20 +00:00
93 lines
4.8 KiB
Markdown
93 lines
4.8 KiB
Markdown
|
||
|
||
<details>
|
||
|
||
<summary><strong>Support HackTricks and get benefits!</strong></summary>
|
||
|
||
- 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)!
|
||
|
||
- Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
||
|
||
- Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
||
|
||
- **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/carlospolopm)**.**
|
||
|
||
- **Share your hacking tricks by submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
|
||
|
||
</details>
|
||
|
||
|
||
# Payloads
|
||
|
||
## Ignored parts of an email
|
||
|
||
The symbols: **+, -** and **{}** in rare occasions can be used for tagging and ignored by most e-mail servers
|
||
|
||
* E.g. john.doe+intigriti@example.com → john.doe@example.com
|
||
|
||
**Comments between parentheses ()** at the beginning or the end will also be ignored
|
||
|
||
* E.g. john.doe(intigriti)@example.com → john.doe@example.com
|
||
|
||
## Whitelist bypass
|
||
|
||
* inti(;inti@inti.io;)@whitelisted.com
|
||
* inti@inti.io(@whitelisted.com)
|
||
* inti+(@whitelisted.com;)@inti.io
|
||
|
||
## IPs
|
||
|
||
You can also use IPs as domain named between square brackets:
|
||
|
||
* john.doe@\[127.0.0.1]
|
||
* john.doe@\[IPv6:2001:db8::1]
|
||
|
||
## Other vulns
|
||
|
||
.png>)
|
||
|
||
# Third party SSO
|
||
|
||
## XSS
|
||
|
||
Some services like **github** or **salesforce allows** you to create an **email address with XSS payloads on it**. If you can **use this providers to login on other services** and this services **aren't sanitising** correctly the email, you could cause **XSS**.
|
||
|
||
## Account-Takeover
|
||
|
||
If a **SSO service** allows you to **create an account without verifying the given email address** (like **salesforce**) and then you can use that account to **login in a different service** that **trusts** salesforce, you could access any account.\
|
||
_Note that salesforce indicates if the given email was or not verified but so the application should take into account this info._
|
||
|
||
# Reply-To
|
||
|
||
You can send an email using _**From: company.com**_** ** and _**Replay-To: attacker.com**_ and if any **automatic reply** is sent due to the email was sent **from** an **internal address** the **attacker** may be able to **receive** that **response**.
|
||
|
||
# **References**
|
||
|
||
* [**https://drive.google.com/file/d/1iKL6wbp3yYwOmxEtAg1jEmuOf8RM8ty9/view**](https://drive.google.com/file/d/1iKL6wbp3yYwOmxEtAg1jEmuOf8RM8ty9/view)
|
||
|
||
# Hard Bounce Rate
|
||
|
||
Some applications like AWS have a **Hard Bounce Rate** (in AWS is 10%), that whenever is overloaded the email service is blocked.
|
||
|
||
A **hard bounce** is an **email** that couldn’t be delivered for some permanent reasons. Maybe the **email’s** a fake address, maybe the **email** domain isn’t a real domain, or maybe the **email** recipient’s server won’t accept **emails**) , that means from total of 1000 emails if 100 of them were fake or were invalid that caused all of them to bounce, **AWS SES** will block your service.
|
||
|
||
So, if you are able to **send mails (maybe invitations) from the web application to any email address, you could provoke this block by sending hundreds of invitations to nonexistent users and domains: Email service DoS.**
|
||
|
||
|
||
<details>
|
||
|
||
<summary><strong>Support HackTricks and get benefits!</strong></summary>
|
||
|
||
- 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)!
|
||
|
||
- Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family)
|
||
|
||
- Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com)
|
||
|
||
- **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/carlospolopm)**.**
|
||
|
||
- **Share your hacking tricks by submitting PRs to the** [**hacktricks github repo**](https://github.com/carlospolop/hacktricks)**.**
|
||
|
||
</details>
|
||
|
||
|