National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2014-3556 Detail

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.

Source:  MITRE
Description Last Modified:  12/29/2014

Impact

CVSS v2.0 Severity and Metrics:

Base Score: 4.3 MEDIUM
Vector: (AV:N/AC:M/Au:N/C:P/I:N/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 8.6


Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): None
Availability (A): None
Additional Information:
Victim must voluntarily interact with attack mechanism
Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html Patch Vendor Advisory
http://marc.info/?l=bugtraq&m=142103967620673&w=2
http://nginx.org/download/patch.2014.starttls.txt
https://bugzilla.redhat.com/show_bug.cgi?id=1126891

Technical Details

Vulnerability Type (View All)

Change History

4 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2014-3556
NVD Published Date:
12/29/2014
NVD Last Modified:
03/16/2015