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Bug 1498867 - (CVE-2017-15042) CVE-2017-15042 golang: smtp.PlainAuth susceptible to man-in-the-middle password harvesting
CVE-2017-15042 golang: smtp.PlainAuth susceptible to man-in-the-middle passwo...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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: ---
Assigned To: Red Hat Product Security
impact=moderate,public=20171004,repor...
: Security
Depends On: 1498872 1498873 1499160 1500587 1522596 1565784
Blocks: 1498774 1498876
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Reported: 2017-10-05 09:01 EDT by Adam Mariš
Modified: 2018-06-29 18:28 EDT (History)
27 users (show)

See Also:
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.
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RHEL 7.3 requirements from Atomic Host:
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External Trackers
Tracker ID Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2017:3463 normal SHIPPED_LIVE Moderate: go-toolset-7 and go-toolset-7-golang security and bug fix update 2017-12-14 11:34:49 EST
Red Hat Product Errata RHSA-2018:0878 None None None 2018-04-10 04:27 EDT

  None (edit)
Description Adam Mariš 2017-10-05 09:01:04 EDT 
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 09:09:28 EDT 
Created golang tracking bugs for this issue:

Affects: epel-6 [bug 1498872]
Affects: fedora-all [bug 1498873]
Comment 2 Joshua Padman 2017-10-05 20:10:52 EDT 
github issue was updated to include CVE-2017-15042
Comment 5 errata-xmlrpc 2017-12-14 06:35:51 EST 
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 04:27:07 EDT 
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
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