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CVE-2023-51766

Description

Exim before 4.97.1 allows SMTP smuggling in certain PIPELINING/CHUNKING configurations. Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Exim supports . but some other popular e-mail servers do not.

POC

Reference

- https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/

- https://www.youtube.com/watch?v=V8KPV96g1To

Github

- https://github.com/20142995/nuclei-templates

- https://github.com/AhenKay/INPT_report

- https://github.com/Farrhouq/Inpt-report

- https://github.com/cyb3r-w0lf/nuclei-template-collection

- https://github.com/fkie-cad/nvd-json-data-feeds

- https://github.com/hannob/smtpsmug

- https://github.com/krlabs/eximsmtp-vulnerabilities