{"id":"CVE-2014-3556","aliases":["DEBIAN-CVE-2014-3556","EUVD-2014-3539","GHSA-8277-2g6w-24gq","UBUNTU-CVE-2014-3556","openSUSE-SU-2024:10044-1"],"status":"published","title":"The STARTTLS implementation in mail/ngx_mail_smtp_handler.c in the SMTP proxy in nginx 1.5.x and...","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.","severity":{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.07832,"percentile":0.94715,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-77"],"published":"2014-12-29T20:00:00Z","modified":"2026-10-23T15:47:39Z","fixes":[{"ecosystem":"Debian:12","package":"nginx","fixed_in":["1.6.1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"nginx","fixed_in":["1.6.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"nginx","fixed_in":["1.6.1-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.1-1"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.11.4-2.5"}]}],"bundled":11}],"products":[{"vendor":"f5","product":"nginx"}],"references":[{"url":"http://marc.info/?l=bugtraq\u0026m=142103967620673\u0026w=2","tags":["vendor-advisory","x_refsource_HP","x_transferred","Issue Tracking","Third Party Advisory","advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1126891","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Third Party Advisory","advisory","report"]},{"url":"http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Patch","Vendor Advisory","advisory","fix","report"]},{"url":"http://nginx.org/download/patch.2014.starttls.txt","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2014-3556"},{"url":"https://github.com/advisories/GHSA-8277-2g6w-24gq"},{"url":"https://security-tracker.debian.org/tracker/CVE-2014-3556","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2014-3556","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2014-3556","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2011-4315","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-2089","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-2070","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4547","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0133","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-3556","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-3616","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-0742","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-0746","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-0747","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4450","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2014-3556","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.","status":"published","published":"2014-12-29T20:00:00Z","modified":"2024-08-06T10:50:17.339Z","updated_at":"2026-11-02T14:33:44.23164Z"}],"euvd":[{"id":"EUVD-2014-3539","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.","status":"published","published":"2014-12-29T20:00:00Z","modified":"2024-08-06T10:50:17Z","updated_at":"2026-11-03T01:57:10.446744Z"}],"ghsa":[{"id":"GHSA-8277-2g6w-24gq","title":"The STARTTLS implementation in mail/ngx_mail_smtp_handler.c in the SMTP proxy in nginx 1.5.x and...","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.","status":"published","published":"2022-05-13T01:05:17Z","modified":"2023-02-01T05:02:51Z","cwes":["CWE-77"],"updated_at":"2026-11-02T14:49:58.981291Z"}],"nvd":[{"id":"CVE-2014-3556","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.","status":"published","published":"2014-12-29T20:59:03.943Z","modified":"2026-06-17T00:08:28.65Z","cvss":[{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T14:02:57.680258Z"}],"osv":[{"id":"CVE-2014-3556","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.","status":"published","published":"2014-12-29T20:59:03Z","modified":"2026-04-10T03:43:47.806559Z","updated_at":"2026-11-02T15:43:59.654289Z"},{"id":"DEBIAN-CVE-2014-3556","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.","status":"published","published":"2014-12-29T20:59:03.943Z","modified":"2026-10-23T15:47:39.684913537Z","updated_at":"2026-11-02T15:45:26.134753Z"},{"id":"openSUSE-SU-2024:10044-1","title":"nginx-1.11.4-2.5 on GA media","description":"These are all security issues fixed in the nginx-1.11.4-2.5 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:22:35.012911Z","updated_at":"2026-11-02T16:58:33.135986Z"},{"id":"UBUNTU-CVE-2014-3556","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.","status":"withdrawn","published":"2014-12-29T20:59:00Z","modified":"2025-07-16T07:31:57.462891Z","updated_at":"2026-11-02T15:54:09.010095Z"}]}}