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TI-2014-02881 Aliases CVE-2014-3556GHSA-8277-2g6w-24gq

The STARTTLS implementation in mail/ngx_mail_smtp_handler.c in the SMTP proxy in nginx…

Priority MEDIUM 41CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Medium
Impact type
Code execution
Confidentiality · integrity · availability
Partial · Partial · Partial
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-77.

Summary

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.

Why it matters now

EPSS 0.07832 94th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*1.5.6 to before 1.6.1; 1.7.0 to before 1.7.4VulnerableF5
  • cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:* Versions 1.5.6 to before 1.6.1; 1.7.0 to before 1.7.4 Vulnerable ·F5

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Software CollectionsAffectedNo fix yet
Not affected: 1 product
  • Red Hat Software Collections

Timeline

  1. 2026-10-02 Threatist record created from CVE-2014-3556
  2. 2026-10-03 Alias added: GHSA-8277-2g6w-24gq

References

Patch 2

Advisory 2

  • TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2013-01799 The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0… CVSS 2.0HIGH 7.5
  • TI-2016-00666 The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 allows remote attackers to… CVSS 3.1HIGH 7.5
  • TI-2019-06948 Some HTTP/2 implementations are vulnerable to resource loops, potentially leading to a… CVSS 3.1HIGH 7.5
  • TI-2009-02513 Buffer underflow in src/http/ngx_http_parse.c in nginx 0.1.0 through 0.5.37, 0.6.x before… CVSS 2.0HIGH 7.5
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences