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CVE-2017-15042

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2018-0878-01
Posted Apr 11, 2018
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2018-0878-01 - The golang packages provide the Go programming language compiler. The following packages have been upgraded to a later upstream version: golang. Issues addressed include code execution and man-in-the-middle vulnerabilities.

tags | advisory, vulnerability, code execution
systems | linux, redhat
advisories | CVE-2017-15041, CVE-2017-15042, CVE-2018-6574
MD5 | ea5e6301671818515ab9f6d2a0f9c255
Red Hat Security Advisory 2017-3463-01
Posted Dec 14, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-3463-01 - Go Toolset provides the Go programming language tools and libraries. Go is alternatively known as golang. Security Fix: An arbitrary command execution flaw was found in the way Go's "go get" command handled the checkout of source code repositories. A remote attacker capable of hosting malicious repositories could potentially use this flaw to cause arbitrary command execution on the client side. 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.

tags | advisory, remote, arbitrary
systems | linux, redhat
advisories | CVE-2017-15041, CVE-2017-15042
MD5 | 565b46ec35ed4f8b9253642745a167e1
Gentoo Linux Security Advisory 201710-23
Posted Oct 23, 2017
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201710-23 - Multiple vulnerabilities have been found in Go, the worst of which may result in the execution of arbitrary commands. Versions less than 1.9.1 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2017-15041, CVE-2017-15042
MD5 | f5f167411f9dac3f27c06377f9819d48
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