Bug 1498867 (CVE-2017-15042)

Summary:	CVE-2017-15042 golang: smtp.PlainAuth susceptible to man-in-the-middle password harvesting
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	admiller, amurdaca, apevec, bleanhar, ccoleman, chrisw, dedgar, dmcphers, jcajka, jgoulding, jjoyce, jkeck, jschluet, kbasil, lemenkov, lhh, lpeer, markmc, mburns, rbryant, renich, sclewis, slinaber, s, tdecacqu, ttomecek, vbatts
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	golang 1.8.4, golang 1.9.1	Doc Type:	If docs needed, set a value
Doc Text:	It was found that smtp.PlainAuth authentication scheme in Go did not verify the TLS requirement properly. A remote man-in-the-middle attacker could potentially use this flaw to sniff SMTP credentials sent by a Go application.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:26:32 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1498872, 1498873, 1499160, 1500587, 1522596, 1565784
Bug Blocks:	1498774, 1498876

Description Adam Mariš 2017-10-05 13:01:04 UTC

It was found that smtp.PlainAuth scheme was vulnerable to man-in-the-middle attack. smtp.PlainAuth implementation would send the username and password to man-in-the-middle SMTP server that doesn’t advertise STARTTLS and does advertise that PLAIN auth is OK.

Upstream bug:

https://github.com/golang/go/issues/22134

Upstream patches:

Go 1.8: https://go-review.googlesource.com/c/go/+/68023
Go 1.9: https://go-review.googlesource.com/c/go/+/68210

Comment 1 Adam Mariš 2017-10-05 13:09:28 UTC

Created golang tracking bugs for this issue:

Affects: epel-6 [bug 1498872]
Affects: fedora-all [bug 1498873]

Comment 2 Joshua Padman 2017-10-06 00:10:52 UTC

github issue was updated to include CVE-2017-15042

Comment 5 errata-xmlrpc 2017-12-14 11:35:51 UTC

This issue has been addressed in the following products:

  Red Hat Developer Tools

Via RHSA-2017:3463 https://access.redhat.com/errata/RHSA-2017:3463

Comment 6 errata-xmlrpc 2018-04-10 08:27:07 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2018:0878 https://access.redhat.com/errata/RHSA-2018:0878