POC详情： e76d0a8e321b7b3503d100f579479da271416bde

来源
https://github.com/duy-31/CVE-2023-51764
关联漏洞
标题： Postfix 安全漏洞 (CVE-2023-51764)
描述：Postfix是一款开源的邮件传输代理。 Postfix 3.8.4之前版本存在安全漏洞，该漏洞源于允许攻击者绕过SPF保护机制进行SMTP走私。
描述
Postfix SMTP Smuggling - Expect Script POC
介绍
# CVE-2023-51764
Postfix SMTP Smuggling - Expect Script POC

send an email that is legitimate, but inside the email there is many others emails (different senders, recipients, subjet, etc).
The initial email is check for SPF/DKIM/DMARC, the others inside are not !

usage: ./cve-2023-51764.sh mx.fqdn port
<br>./cve-2023-51764.sh mail.mydomain.com 25

![image](https://github.com/duy-31/CVE-2023-51764/assets/20819326/e6a0175f-b5ed-4022-aa06-386599984df3)


notes:
chmod +x cve-2023-51764.sh
<br> require app expect
<br> require legitimate ip sender and email sender (to pass SPF, DKIM, DMARC)

result:

![image](https://github.com/duy-31/CVE-2023-51764/assets/20819326/82d31732-8548-493c-98e8-28cadc571107)


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Kudos: https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide
<br>Workaround/Fix: https://www.postfix.org/smtp-smuggling.html

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more about me ;) https://www.linkedin.com/in/duy-huan-bui/

⚠️ Disclaimer:
IMPORTANT: This script is provided for educational, ethical testing, and lawful use ONLY. Do not use it on any system or network without explicit permission. Unauthorized access to computer systems and networks is illegal, and users caught performing unauthorized activities are subject to legal actions. The author is NOT responsible for any damage caused by the misuse of this script.
文件快照

 [4.0K]  /data/pocs/e76d0a8e321b7b3503d100f579479da271416bde
├── [2.0K]  cve-2023-51764.sh
└── [1.3K]  README.md

0 directories, 2 files
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