The STARTTLS implementation in mail/ngx_mail_smtp_handler.c in the SMTP proxy in nginx 1.5.x and 1.6.x before 1.6.1 and 1.7.x before 1.7.4 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2024-08-06T10:50:17.339Z
Reserved: 2014-05-14T00:00:00
Link: CVE-2014-3556
No data.
Status : Deferred
Published: 2014-12-29T20:59:03.943
Modified: 2025-04-12T10:46:40.837
Link: CVE-2014-3556
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