An update for golang is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from

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====================================================================                   Red Hat Security Advisory

Synopsis:          Moderate: golang security, bug fix, and enhancement update
Advisory ID:       RHSA-2016:1538-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2016:1538.html
Issue date:        2016-08-02
CVE Names:         CVE-2016-5386 
====================================================================
1. Summary:

An update for golang is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact
of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available for each vulnerability from
the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Server Optional (v. 7) - noarch, x86_64

3. Description:

The golang packages provide the Go programming language compiler.

The following packages have been upgraded to a newer upstream version:
golang (1.6.3). (BZ#1346331)

Security Fix(es):

* An input-validation flaw was discovered in the Go programming language
built in CGI implementation, which set the environment variable
"HTTP_PROXY" using the incoming "Proxy" HTTP-request header. The
environment variable "HTTP_PROXY" is used by numerous web clients,
including Go's net/http package, to specify a proxy server to use for HTTP
and, in some cases, HTTPS requests. This meant that when a CGI-based web
application ran, an attacker could specify a proxy server which the
application then used for subsequent outgoing requests, allowing a
man-in-the-middle attack. (CVE-2016-5386)

Red Hat would like to thank Scott Geary (VendHQ) for reporting this issue.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1346331 - REBASE to golang 1.6
1353798 - CVE-2016-5386 Go: sets environmental variable  based on user supplied Proxy request header

6. Package List:

Red Hat Enterprise Linux Server Optional (v. 7):

Source:
golang-1.6.3-1.el7_2.1.src.rpm

noarch:
golang-docs-1.6.3-1.el7_2.1.noarch.rpm
golang-misc-1.6.3-1.el7_2.1.noarch.rpm
golang-src-1.6.3-1.el7_2.1.noarch.rpm
golang-tests-1.6.3-1.el7_2.1.noarch.rpm

x86_64:
golang-1.6.3-1.el7_2.1.x86_64.rpm
golang-bin-1.6.3-1.el7_2.1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key

7. References:

https://access.redhat.com/security/cve/CVE-2016-5386
https://access.redhat.com/security/updates/classification#moderate

8. Contact:

The Red Hat security contact is . More contact
details at https://access.redhat.com/security/team/contact

Copyright 2016 Red Hat, Inc.
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