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Nginx: STARTTLS command injection (CVE-2014-3556)

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Nginx: STARTTLS command injection (CVE-2014-3556)

Severity
7
CVSS
(AV:N/AC:M/Au:N/C:P/I:P/A:P)
Published
08/08/2014
Created
07/25/2018
Added
08/08/2014
Modified
11/18/2020

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.

Solution(s)

  • nginx-nginx-upgrade-1_6_1
  • nginx-nginx-upgrade-1_7_4

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