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Vulnerability Report [Misconfigured SPF Record DMARC]



 Hi Team, I am an independent security researcher and I have found a bug in your website https://www.debian.org/
The details of it are as follows:-

Description: this report is about a misconfigured dmarc record flag, which can be used for malicious purposes as it allows for fake mailing on behalf of respected organizations.

About the Issue:
As i seen the Dmarc and TXT record for 
debian.org/


What's the issue:
As u can see in the article below the difference between soft-mail and fail you should be using fail, as Soft-mail allows anyone to send spoofed emails from your domains.
 
Attack Scenario: An attacker will send phishing mail or anything malicious mail  
debian-project@lists.debian.org



even if the victim is aware of phishing attack , he will check the origin email which came from your genuine mail id 
debian-project@lists.debian.org




so he will think that it is genuine mail and get trapped by the attacker.
The attack can be done using any PHP mailer tool like this:-

<?php
$to = "VICTIM@example.com";
$subject = "Password Change";
$txt = "Change your password by visiting here - [VIRUS LINK HERE]l";
$headers = "From: 
debian-project@lists.debian.org

";mail($to,$subject,$txt,$headers);
?>

U can also check your DMARC record form: 
https://mxtoolbox.com/SuperTool.aspx



Waiting for your reply.
Regards,
ALI AZHAR


  

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