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

Synopsis:          Moderate: go-toolset:rhel8 security, bug fix, and enhancement update
Advisory ID:       RHSA-2021:4156-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:4156
Issue date:        2021-11-09
CVE Names:         CVE-2021-33195 CVE-2021-33197 CVE-2021-33198 
                   CVE-2021-36221 
=====================================================================

1. Summary:

An update for the go-toolset:rhel8 module is now available for Red Hat
Enterprise Linux 8.

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 AppStream (v. 8) - aarch64, noarch, ppc64le, s390x, x86_64

3. Description:

Go Toolset provides the Go programming language tools and libraries. Go is
alternatively known as golang. 

The following packages have been upgraded to a later upstream version:
golang (1.16.7). (BZ#1938071)

Security Fix(es):

* golang: net: lookup functions may return invalid host names
(CVE-2021-33195)

* golang: net/http/httputil: ReverseProxy forwards connection headers if
first one is empty (CVE-2021-33197)

* golang: math/big.Rat: may cause a panic or an unrecoverable fatal error
if passed inputs with very large exponents (CVE-2021-33198)

* golang: net/http/httputil: panic due to racy read of persistConn after
handler panic (CVE-2021-36221)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat
Enterprise Linux 8.5 Release Notes linked from the References section.

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/):

1972825 - FIPS mode AES CBC CryptBlocks incorrectly re-initializes IV in file crypto/internal/boring/aes.go
1976168 - TestBoringServerCurves from crypto/tls fails when executed separately [rhel-8]
1979100 - FIPS mode AES CBC Decrypter produces incorrect result
1989564 - CVE-2021-33195 golang: net: lookup functions may return invalid host names
1989570 - CVE-2021-33197 golang: net/http/httputil: ReverseProxy forwards connection headers if first one is empty
1989575 - CVE-2021-33198 golang: math/big.Rat: may cause a panic or an unrecoverable fatal error if passed inputs with very large exponents
1995656 - CVE-2021-36221 golang: net/http/httputil: panic due to racy read of persistConn after handler panic

6. Package List:

Red Hat Enterprise Linux AppStream (v. 8):

Source:
delve-1.6.0-1.module+el8.5.0+10379+d6b83bd0.src.rpm
go-toolset-1.16.7-1.module+el8.5.0+12246+1aac4e3f.src.rpm
golang-1.16.7-1.module+el8.5.0+12246+1aac4e3f.src.rpm

aarch64:
go-toolset-1.16.7-1.module+el8.5.0+12246+1aac4e3f.aarch64.rpm
golang-1.16.7-1.module+el8.5.0+12246+1aac4e3f.aarch64.rpm
golang-bin-1.16.7-1.module+el8.5.0+12246+1aac4e3f.aarch64.rpm

noarch:
golang-docs-1.16.7-1.module+el8.5.0+12246+1aac4e3f.noarch.rpm
golang-misc-1.16.7-1.module+el8.5.0+12246+1aac4e3f.noarch.rpm
golang-src-1.16.7-1.module+el8.5.0+12246+1aac4e3f.noarch.rpm
golang-tests-1.16.7-1.module+el8.5.0+12246+1aac4e3f.noarch.rpm

ppc64le:
go-toolset-1.16.7-1.module+el8.5.0+12246+1aac4e3f.ppc64le.rpm
golang-1.16.7-1.module+el8.5.0+12246+1aac4e3f.ppc64le.rpm
golang-bin-1.16.7-1.module+el8.5.0+12246+1aac4e3f.ppc64le.rpm

s390x:
go-toolset-1.16.7-1.module+el8.5.0+12246+1aac4e3f.s390x.rpm
golang-1.16.7-1.module+el8.5.0+12246+1aac4e3f.s390x.rpm
golang-bin-1.16.7-1.module+el8.5.0+12246+1aac4e3f.s390x.rpm

x86_64:
delve-1.6.0-1.module+el8.5.0+10379+d6b83bd0.x86_64.rpm
delve-debuginfo-1.6.0-1.module+el8.5.0+10379+d6b83bd0.x86_64.rpm
delve-debugsource-1.6.0-1.module+el8.5.0+10379+d6b83bd0.x86_64.rpm
go-toolset-1.16.7-1.module+el8.5.0+12246+1aac4e3f.x86_64.rpm
golang-1.16.7-1.module+el8.5.0+12246+1aac4e3f.x86_64.rpm
golang-bin-1.16.7-1.module+el8.5.0+12246+1aac4e3f.x86_64.rpm
golang-race-1.16.7-1.module+el8.5.0+12246+1aac4e3f.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-2021-33195
https://access.redhat.com/security/cve/CVE-2021-33197
https://access.redhat.com/security/cve/CVE-2021-33198
https://access.redhat.com/security/cve/CVE-2021-36221
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.5_release_notes/

8. Contact:

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

Copyright 2021 Red Hat, Inc.
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