CVE-2014-3556

N/A
Published: December 29, 2014 at 08:00 PM UTC
Updated: June 17, 2026 at 12:08 AM UTC
1 product affected across 1 vendorNGINX

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Severity
N/A
Exploit prediction
EPSS 8%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

1.5.6 ≤ v < 1.6.11.7.0 ≤ v < 1.7.4
Affected range stops below 1.6.1, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.7.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (4)

Mailing Listx_refsource_MLISTPatchVendor Advisory
http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html
Vendor Advisoryx_refsource_HPIssue TrackingThird Party Advisory
http://marc.info/?l=bugtraq&m=142103967620673&w=2
x_refsource_CONFIRMPatchVendor Advisory
http://nginx.org/download/patch.2014.starttls.txt
x_refsource_CONFIRMIssue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1126891

CVSS

Confidentiality
PARTIAL
Integrity
PARTIAL
Availability
PARTIAL
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-77

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