CVE-2014-3556

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*", "matchCriteriaId": "091FA427-14F1-480B-9AF7-BEDE2B95F554", "versionEndExcluding": "1.6.1", "versionStartIncluding": "1.5.6", "vulnerable": true}, {"criteria": "cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*", "matchCriteriaId": "E907E772-8057-4A01-97E5-B930769CFAD2", "versionEndExcluding": "1.7.4", "versionStartIncluding": "1.7.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "La implementaci\u00f3n STARTTLS en mail/ngx_mail_smtp_handler.c en el proxy SMTP en nginx 1.5.x y 1.6.x anterior a 1.6.1 y 1.7.x anterior a 1.7.4 no restringe adecuadamente el buffer I/O, lo que permite ataques man-in-the-middle insertar comandos en sesiones cifradas SMTP enviando el comando cleartext que se procesa despu\u00e9s que TLS, relacionado a un ataque 'inyecci\u00f3n de comando de texto plano', un problema similar a CVE-2011-0411"}], "id": "CVE-2014-3556", "lastModified": "2026-06-17T00:08:28.650", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 6.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2014-12-29T20:59:03.943", "references": [{"source": "secalert@redhat.com", "tags": ["Patch", "Vendor Advisory"], "url": "http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "http://marc.info/?l=bugtraq&m=142103967620673&w=2"}, {"source": "secalert@redhat.com", "tags": ["Patch", "Vendor Advisory"], "url": "http://nginx.org/download/patch.2014.starttls.txt"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1126891"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "http://marc.info/?l=bugtraq&m=142103967620673&w=2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "http://nginx.org/download/patch.2014.starttls.txt"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1126891"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-77"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "nginx: SMTP STARTTLS plaintext injection flaw", "id": "1126891", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1126891"}, "csaw": false, "cvss": {"cvss_base_score": "2.9", "cvss_scoring_vector": "AV:A/AC:M/Au:N/C:P/I:N/A:N", "status": "draft"}, "details": ["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."], "name": "CVE-2014-3556", "package_state": [{"cpe": "cpe:/a:redhat:rhel_software_collections:1", "fix_state": "Not affected", "package_name": "nginx14-nginx", "product_name": "Red Hat Software Collections"}, {"cpe": "cpe:/a:redhat:rhel_software_collections:1", "fix_state": "Affected", "package_name": "nginx16-nginx", "product_name": "Red Hat Software Collections"}], "public_date": "2014-08-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2014-3556\nhttps://nvd.nist.gov/vuln/detail/CVE-2014-3556"], "statement": "This issue did not affect the versions of nginx as shipped with Red Hat Software Collections 1 for Red Hat Enterprise Linux 6 and 7.", "threat_severity": "Moderate"}

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