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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://rhn.redhat.com/errata/RHSA-2016-1538.html
Issue date: 2016-08-02
CVE Names: CVE-2016-5386
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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 <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2016 Red Hat, Inc.
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