Original description
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.
Affected software
- nginx ≥ 1.7.0 < 1.7.4≥ 1.5.6 < 1.6.1 Fixed in: 1.7.4, 1.6.1 exact match
Details
- Published
- 2014-12-30
- Last modified
- 2024-08-06
- CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P- EPSS (30-day exploit probability)
- 7.83% (percentile 95)
References
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