Edit Report

Our sensors found this exploit at:

Below is a copy:

Upstream [1] reports:
A bug in nginx SMTP proxy was found, which allows an attacker in a
privileged network position to inject commands into SSL sessions started
with the STARTTLS command, potentially making it possible to steal
sensitive information sent by clients (CVE-2014-3556).

The problem affects nginx 1.5.6 - 1.7.3.

The problem is fixed in nginx 1.7.4, 1.6.1.

Patch for the problem can be found here:


--- src/mail/ngx_mail_smtp_handler.c
+++ src/mail/ngx_mail_smtp_handler.c
@@ -777,6 +777,9 @@ ngx_mail_smtp_starttls(ngx_mail_session_
+            s->buffer->pos = s->buffer->start;
+            s->buffer->last = s->buffer->start;
             c->read->handler = ngx_mail_starttls_handler;
             return NGX_OK;

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