{"id":"CVE-2017-15042","details":"An unintended cleartext issue exists in Go before 1.8.4 and 1.9.x before 1.9.1. RFC 4954 requires that, during SMTP, the PLAIN auth scheme must only be used on network connections secured with TLS. The original implementation of smtp.PlainAuth in Go 1.0 enforced this requirement, and it was documented to do so. In 2013, upstream issue #5184, this was changed so that the server may decide whether PLAIN is acceptable. The result is that if you set up a man-in-the-middle SMTP server that doesn't advertise STARTTLS and does advertise that PLAIN auth is OK, the smtp.PlainAuth implementation sends the username and password.","aliases":["GO-2021-0178"],"modified":"2026-04-02T00:03:45.343605Z","published":"2017-10-05T21:29:00.473Z","related":["MGASA-2018-0089","openSUSE-SU-2024:10802-1","openSUSE-SU-2024:10803-1","openSUSE-SU-2024:10804-1","openSUSE-SU-2024:10805-1","openSUSE-SU-2024:10811-1","openSUSE-SU-2024:10812-1"],"references":[{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/101197"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2017:3463"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2018:0878"},{"type":"ADVISORY","url":"https://golang.org/cl/68210"},{"type":"ADVISORY","url":"https://groups.google.com/d/msg/golang-dev/RinSE3EiJBI/kYL7zb07AgAJ"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201710-23"},{"type":"FIX","url":"https://github.com/golang/go/issues/22134"},{"type":"FIX","url":"https://golang.org/cl/68023"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/golang/go","events":[{"introduced":"0"},{"last_affected":"352996a381701cfa0c16e8de29cbde8f3922182f"},{"introduced":"0"},{"last_affected":"c8aec4095e089ff6ac50d18e97c3f46561f14f48"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"1.8.3"},{"introduced":"0"},{"last_affected":"1.9"}]}}],"versions":["go1","go1.0.1","go1.0.2","go1.0.3","go1.1","go1.1.1","go1.1.2","go1.10","go1.10.1","go1.10.2","go1.10.3","go1.10.4","go1.10.5","go1.10.6","go1.10.7","go1.10.8","go1.10beta1","go1.10beta2","go1.10rc1","go1.10rc2","go1.11","go1.11.1","go1.11.10","go1.11.11","go1.11.12","go1.11.13","go1.11.2","go1.11.3","go1.11.4","go1.11.5","go1.11.6","go1.11.7","go1.11.8","go1.11.9","go1.11beta1","go1.11beta2","go1.11beta3","go1.11rc1","go1.11rc2","go1.12","go1.12.1","go1.12.10","go1.12.11","go1.12.12","go1.12.13","go1.12.14","go1.12.15","go1.12.16","go1.12.17","go1.12.2","go1.12.3","go1.12.4","go1.12.5","go1.12.6","go1.12.7","go1.12.8","go1.12.9","go1.12beta1","go1.12beta2","go1.12rc1","go1.13","go1.13.1","go1.13.10","go1.13.11","go1.13.12","go1.13.13","go1.13.14","go1.13.15","go1.13.2","go1.13.3","go1.13.4","go1.13.5","go1.13.6","go1.13.7","go1.13.8","go1.13.9","go1.13beta1","go1.13rc1","go1.13rc2","go1.14","go1.14.1","go1.14.10","go1.14.11","go1.14.12","go1.14.13","go1.14.14","go1.14.15","go1.14.2","go1.14.3","go1.14.4","go1.14.5","go1.14.6","go1.14.7","go1.14.8","go1.14.9","go1.14beta1","go1.14rc1","go1.15","go1.15.1","go1.15.10","go1.15.11","go1.15.12","go1.15.13","go1.15.14","go1.15.15","go1.15.2","go1.15.3","go1.15.4","go1.15.5","go1.15.6","go1.15.7","go1.15.8","go1.15.9","go1.15beta1","go1.15rc1","go1.15rc2","go1.16","go1.16.1","go1.16.10","go1.16.11","go1.16.12","go1.16.13","go1.16.14","go1.16.15","go1.16.2","go1.16.3","go1.16.4","go1.16.5","go1.16.6","go1.16.7","go1.16.8","go1.16.9","go1.16beta1","go1.16rc1","go1.17","go1.17.1","go1.17.10","go1.17.11","go1.17.12","go1.17.13","go1.17.2","go1.17.3","go1.17.4","go1.17.5","go1.17.6","go1.17.7","go1.17.8","go1.17.9","go1.17beta1","go1.17rc1","go1.17rc2","go1.18","go1.18.1","go1.18.10","go1.18.2","go1.18.3","go1.18.4","go1.18.5","go1.18.6","go1.18.7","go1.18.8","go1.18.9","go1.18beta1","go1.18beta2","go1.18rc1","go1.1rc2","go1.1rc3","go1.2","go1.2.1","go1.2.2","go1.2rc2","go1.2rc3","go1.2rc4","go1.2rc5","go1.3","go1.3.1","go1.3.2","go1.3.3","go1.3beta1","go1.3beta2","go1.3rc1","go1.3rc2","go1.4","go1.4.1","go1.4.2","go1.4.3","go1.4beta1","go1.4rc1","go1.4rc2","go1.5","go1.5.1","go1.5.2","go1.5.3","go1.5.4","go1.5beta1","go1.5beta2","go1.5beta3","go1.5rc1","go1.6","go1.6.1","go1.6.2","go1.6.3","go1.6.4","go1.6beta1","go1.6beta2","go1.6rc1","go1.6rc2","go1.7","go1.7.1","go1.7.2","go1.7.3","go1.7.4","go1.7.5","go1.7.6","go1.7beta1","go1.7beta2","go1.7rc1","go1.7rc2","go1.7rc3","go1.7rc4","go1.7rc5","go1.7rc6","go1.8","go1.8.1","go1.8.2","go1.8.3","go1.8beta1","go1.8beta2","go1.8rc1","go1.8rc2","go1.8rc3","go1.9","go1.9beta1","go1.9beta2","go1.9rc1","go1.9rc2","release.r56","release.r57","release.r57.1","release.r57.2","release.r58","release.r58.1","release.r58.2","release.r59","release.r60","release.r60.1","release.r60.2","release.r60.3","weekly","weekly.2009-11-06","weekly.2009-11-10","weekly.2009-11-10.1","weekly.2009-11-12","weekly.2009-11-17","weekly.2009-12-07","weekly.2009-12-09","weekly.2009-12-22","weekly.2010-01-05","weekly.2010-01-13","weekly.2010-01-27","weekly.2010-02-04","weekly.2010-02-17","weekly.2010-02-23","weekly.2010-03-04","weekly.2010-03-15","weekly.2010-03-22","weekly.2010-03-30","weekly.2010-04-13","weekly.2010-04-27","weekly.2010-05-04","weekly.2010-05-27","weekly.2010-06-09","weekly.2010-06-21","weekly.2010-07-01","weekly.2010-07-14","weekly.2010-07-29","weekly.2010-08-04","weekly.2010-08-11","weekly.2010-08-25","weekly.2010-09-06","weekly.2010-09-15","weekly.2010-09-22","weekly.2010-09-29","weekly.2010-10-13","weekly.2010-10-13.1","weekly.2010-10-20","weekly.2010-10-27","weekly.2010-11-02","weekly.2010-11-10","weekly.2010-11-23","weekly.2010-12-02","weekly.2010-12-08","weekly.2010-12-15","weekly.2010-12-1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