National Vulnerability Database

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    Vulnerabilities Detail

CVE-2014-3556 Detail

Current 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
View Analysis Description

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)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:nginx:nginx:1.5.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.1:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.2:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.3:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.4:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.5:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.6:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.7:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.8:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.9:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.10:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.11:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.5.12:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.6.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.6.1:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.7.0:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.7.1:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.7.2:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:a:nginx:nginx:1.7.3:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

3 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