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VULNERABILITIES

CVE-2014-3556 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html CVEPatchVendor Advisory
http://marc.info/?l=bugtraq&m=142103967620673&w=2 CVEIssue TrackingThird Party Advisory
http://nginx.org/download/patch.2014.starttls.txt CVEPatchVendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1126891 CVEIssue TrackingThird Party Advisory
http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html [email protected]PatchVendor Advisory

see all 8 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')[email protected]

Affected Products

ProductVersions
f5 nginx
>= 1.5.6, < 1.6.1
>= 1.7.0, < 1.7.4

CPE

  • cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

10 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2014-3556
NVD Published Date:
Dec 29, 2014
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2014-3556 Details - Not Deferred