CVE-2017-15042

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.

CVSS v3 5.9 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.9^/10

CVSS v3 : MEDIUM

Vector : AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:P/I:N/A:N

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact NONE

Availability Impact NONE

References

Link	Resource
http://www.securityfocus.com/bid/101197	Third Party Advisory VDB Entry
https://access.redhat.com/errata/RHSA-2017:3463
https://access.redhat.com/errata/RHSA-2018:0878
https://github.com/golang/go/issues/22134	Issue Tracking Patch Vendor Advisory
https://golang.org/cl/68023	Issue Tracking Patch Vendor Advisory
https://golang.org/cl/68210	Vendor Advisory
https://groups.google.com/d/msg/golang-dev/RinSE3EiJBI/kYL7zb07AgAJ	Mailing List Vendor Advisory
https://security.gentoo.org/glsa/201710-23	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:golang:go::::::::
	cpe:2.3:a:golang:go:1.9:::::::*

History

No history.

Information

Published : 2017-10-05 21:29

Updated : 2023-12-10 12:15

NVD link : CVE-2017-15042

Mitre link : CVE-2017-15042

CVE.ORG link : CVE-2017-15042

JSON object : View

Products Affected

golang

go

CWE

CWE-319

Cleartext Transmission of Sensitive Information

{"id": "CVE-2017-15042", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 4.3, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "authentication": "NONE", "integrityImpact": "NONE", "accessComplexity": "MEDIUM", "availabilityImpact": "NONE", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 2.9, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 3.6, "exploitabilityScore": 2.2}]}, "published": "2017-10-05T21:29:00.473", "references": [{"url": "http://www.securityfocus.com/bid/101197", "tags": ["Third Party Advisory", "VDB Entry"], "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2017:3463", "source": "cve@mitre.org"}, {"url": "https://access.redhat.com/errata/RHSA-2018:0878", "source": "cve@mitre.org"}, {"url": "https://github.com/golang/go/issues/22134", "tags": ["Issue Tracking", "Patch", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://golang.org/cl/68023", "tags": ["Issue Tracking", "Patch", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://golang.org/cl/68210", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://groups.google.com/d/msg/golang-dev/RinSE3EiJBI/kYL7zb07AgAJ", "tags": ["Mailing List", "Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://security.gentoo.org/glsa/201710-23", "tags": ["Third Party Advisory"], "source": "cve@mitre.org"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-319"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Existe un problema de texto en claro no planeado en la versi\u00f3n 1.8.4 y versiones 1.9.x anteriores a la 1.9.4 de Go. La RFC 4954 requiere que durante la autenticaci\u00f3n SMTP, el esquema de autenticaci\u00f3n PLAIN solo se use en conexiones de red protegidas con TLS. La implementaci\u00f3n original de smtp.PlainAuth en Go 1.0 aseguraba el cumplimiento de este requisito y se document\u00f3 que esto se llevase a cabo. En 2013, problema upstream #5184, esto se modific\u00f3 para que el servidor pudiera decidir si se acepta PLAIN. El resultado es que si un usuario crea un servidor SMTP Man-in-the-Middle (MitM) que no anuncia STARTTLS pero s\u00ed anuncia que la autenticaci\u00f3n PLAIN es OK, la implementaci\u00f3n smtp.PlainAuth env\u00eda el nombre de usuario y contrase\u00f1a."}], "lastModified": "2019-10-03T00:03:26.223", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "49921821-1359-4B19-BDB2-7FBA767804A8", "versionEndIncluding": "1.8.3"}, {"criteria": "cpe:2.3:a:golang:go:1.9:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7596E7CD-6863-4933-A9FB-74CF0ECF918F"}], "operator": "OR"}]}], "sourceIdentifier": "cve@mitre.org"}