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

Synopsis:          Important: gnutls and nettle security update
Advisory ID:       RHSA-2021:1246-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2021:1246
Issue date:        2021-04-19
CVE Names:         CVE-2021-20305 
=====================================================================

1. Summary:

An update for gnutls and nettle is now available for Red Hat Enterprise
Linux 8.2 Extended Update Support.

Red Hat Product Security has rated this update as having a security impact
of Important. 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 EUS (v. 8.2) - aarch64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux BaseOS EUS (v. 8.2) - aarch64, ppc64le, s390x, x86_64

3. Description:

The gnutls packages provide the GNU Transport Layer Security (GnuTLS)
library, which implements cryptographic algorithms and protocols such as
SSL, TLS, and DTLS.

Nettle is a cryptographic library that is designed to fit easily in almost
any context: In crypto toolkits for object-oriented languages, such as C++,
Python, or Pike, in applications like LSH or GNUPG, or even in kernel
space.

Security Fix(es):

* nettle: Out of bounds memory access in signature verification
(CVE-2021-20305)

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.

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/):

1942533 - CVE-2021-20305 nettle: Out of bounds memory access in signature verification

6. Package List:

Red Hat Enterprise Linux AppStream EUS (v. 8.2):

aarch64:
gnutls-c++-3.6.8-12.el8_2.aarch64.rpm
gnutls-c++-debuginfo-3.6.8-12.el8_2.aarch64.rpm
gnutls-dane-3.6.8-12.el8_2.aarch64.rpm
gnutls-dane-debuginfo-3.6.8-12.el8_2.aarch64.rpm
gnutls-debuginfo-3.6.8-12.el8_2.aarch64.rpm
gnutls-debugsource-3.6.8-12.el8_2.aarch64.rpm
gnutls-devel-3.6.8-12.el8_2.aarch64.rpm
gnutls-utils-3.6.8-12.el8_2.aarch64.rpm
gnutls-utils-debuginfo-3.6.8-12.el8_2.aarch64.rpm
nettle-debuginfo-3.4.1-2.el8_2.aarch64.rpm
nettle-debugsource-3.4.1-2.el8_2.aarch64.rpm
nettle-devel-3.4.1-2.el8_2.aarch64.rpm

ppc64le:
gnutls-c++-3.6.8-12.el8_2.ppc64le.rpm
gnutls-c++-debuginfo-3.6.8-12.el8_2.ppc64le.rpm
gnutls-dane-3.6.8-12.el8_2.ppc64le.rpm
gnutls-dane-debuginfo-3.6.8-12.el8_2.ppc64le.rpm
gnutls-debuginfo-3.6.8-12.el8_2.ppc64le.rpm
gnutls-debugsource-3.6.8-12.el8_2.ppc64le.rpm
gnutls-devel-3.6.8-12.el8_2.ppc64le.rpm
gnutls-utils-3.6.8-12.el8_2.ppc64le.rpm
gnutls-utils-debuginfo-3.6.8-12.el8_2.ppc64le.rpm
nettle-debuginfo-3.4.1-2.el8_2.ppc64le.rpm
nettle-debugsource-3.4.1-2.el8_2.ppc64le.rpm
nettle-devel-3.4.1-2.el8_2.ppc64le.rpm

s390x:
gnutls-c++-3.6.8-12.el8_2.s390x.rpm
gnutls-c++-debuginfo-3.6.8-12.el8_2.s390x.rpm
gnutls-dane-3.6.8-12.el8_2.s390x.rpm
gnutls-dane-debuginfo-3.6.8-12.el8_2.s390x.rpm
gnutls-debuginfo-3.6.8-12.el8_2.s390x.rpm
gnutls-debugsource-3.6.8-12.el8_2.s390x.rpm
gnutls-devel-3.6.8-12.el8_2.s390x.rpm
gnutls-utils-3.6.8-12.el8_2.s390x.rpm
gnutls-utils-debuginfo-3.6.8-12.el8_2.s390x.rpm
nettle-debuginfo-3.4.1-2.el8_2.s390x.rpm
nettle-debugsource-3.4.1-2.el8_2.s390x.rpm
nettle-devel-3.4.1-2.el8_2.s390x.rpm

x86_64:
gnutls-c++-3.6.8-12.el8_2.i686.rpm
gnutls-c++-3.6.8-12.el8_2.x86_64.rpm
gnutls-c++-debuginfo-3.6.8-12.el8_2.i686.rpm
gnutls-c++-debuginfo-3.6.8-12.el8_2.x86_64.rpm
gnutls-dane-3.6.8-12.el8_2.i686.rpm
gnutls-dane-3.6.8-12.el8_2.x86_64.rpm
gnutls-dane-debuginfo-3.6.8-12.el8_2.i686.rpm
gnutls-dane-debuginfo-3.6.8-12.el8_2.x86_64.rpm
gnutls-debuginfo-3.6.8-12.el8_2.i686.rpm
gnutls-debuginfo-3.6.8-12.el8_2.x86_64.rpm
gnutls-debugsource-3.6.8-12.el8_2.i686.rpm
gnutls-debugsource-3.6.8-12.el8_2.x86_64.rpm
gnutls-devel-3.6.8-12.el8_2.i686.rpm
gnutls-devel-3.6.8-12.el8_2.x86_64.rpm
gnutls-utils-3.6.8-12.el8_2.x86_64.rpm
gnutls-utils-debuginfo-3.6.8-12.el8_2.i686.rpm
gnutls-utils-debuginfo-3.6.8-12.el8_2.x86_64.rpm
nettle-debuginfo-3.4.1-2.el8_2.i686.rpm
nettle-debuginfo-3.4.1-2.el8_2.x86_64.rpm
nettle-debugsource-3.4.1-2.el8_2.i686.rpm
nettle-debugsource-3.4.1-2.el8_2.x86_64.rpm
nettle-devel-3.4.1-2.el8_2.i686.rpm
nettle-devel-3.4.1-2.el8_2.x86_64.rpm

Red Hat Enterprise Linux BaseOS EUS (v. 8.2):

Source:
gnutls-3.6.8-12.el8_2.src.rpm
nettle-3.4.1-2.el8_2.src.rpm

aarch64:
gnutls-3.6.8-12.el8_2.aarch64.rpm
gnutls-c++-debuginfo-3.6.8-12.el8_2.aarch64.rpm
gnutls-dane-debuginfo-3.6.8-12.el8_2.aarch64.rpm
gnutls-debuginfo-3.6.8-12.el8_2.aarch64.rpm
gnutls-debugsource-3.6.8-12.el8_2.aarch64.rpm
gnutls-utils-debuginfo-3.6.8-12.el8_2.aarch64.rpm
nettle-3.4.1-2.el8_2.aarch64.rpm
nettle-debuginfo-3.4.1-2.el8_2.aarch64.rpm
nettle-debugsource-3.4.1-2.el8_2.aarch64.rpm

ppc64le:
gnutls-3.6.8-12.el8_2.ppc64le.rpm
gnutls-c++-debuginfo-3.6.8-12.el8_2.ppc64le.rpm
gnutls-dane-debuginfo-3.6.8-12.el8_2.ppc64le.rpm
gnutls-debuginfo-3.6.8-12.el8_2.ppc64le.rpm
gnutls-debugsource-3.6.8-12.el8_2.ppc64le.rpm
gnutls-utils-debuginfo-3.6.8-12.el8_2.ppc64le.rpm
nettle-3.4.1-2.el8_2.ppc64le.rpm
nettle-debuginfo-3.4.1-2.el8_2.ppc64le.rpm
nettle-debugsource-3.4.1-2.el8_2.ppc64le.rpm

s390x:
gnutls-3.6.8-12.el8_2.s390x.rpm
gnutls-c++-debuginfo-3.6.8-12.el8_2.s390x.rpm
gnutls-dane-debuginfo-3.6.8-12.el8_2.s390x.rpm
gnutls-debuginfo-3.6.8-12.el8_2.s390x.rpm
gnutls-debugsource-3.6.8-12.el8_2.s390x.rpm
gnutls-utils-debuginfo-3.6.8-12.el8_2.s390x.rpm
nettle-3.4.1-2.el8_2.s390x.rpm
nettle-debuginfo-3.4.1-2.el8_2.s390x.rpm
nettle-debugsource-3.4.1-2.el8_2.s390x.rpm

x86_64:
gnutls-3.6.8-12.el8_2.i686.rpm
gnutls-3.6.8-12.el8_2.x86_64.rpm
gnutls-c++-debuginfo-3.6.8-12.el8_2.i686.rpm
gnutls-c++-debuginfo-3.6.8-12.el8_2.x86_64.rpm
gnutls-dane-debuginfo-3.6.8-12.el8_2.i686.rpm
gnutls-dane-debuginfo-3.6.8-12.el8_2.x86_64.rpm
gnutls-debuginfo-3.6.8-12.el8_2.i686.rpm
gnutls-debuginfo-3.6.8-12.el8_2.x86_64.rpm
gnutls-debugsource-3.6.8-12.el8_2.i686.rpm
gnutls-debugsource-3.6.8-12.el8_2.x86_64.rpm
gnutls-utils-debuginfo-3.6.8-12.el8_2.i686.rpm
gnutls-utils-debuginfo-3.6.8-12.el8_2.x86_64.rpm
nettle-3.4.1-2.el8_2.i686.rpm
nettle-3.4.1-2.el8_2.x86_64.rpm
nettle-debuginfo-3.4.1-2.el8_2.i686.rpm
nettle-debuginfo-3.4.1-2.el8_2.x86_64.rpm
nettle-debugsource-3.4.1-2.el8_2.i686.rpm
nettle-debugsource-3.4.1-2.el8_2.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-2021-20305
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2021 Red Hat, Inc.
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