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Red Hat Security Advisory

Synopsis: Moderate: gnupg2 security, bug fix, and enhancement update
Advisory ID: RHSA-2020:4490-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:4490
Issue date: 2020-11-03
CVE Names: CVE-2019-13050
=====================================================================

1. Summary:

An update for gnupg2 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 BaseOS (v. 8) – aarch64, ppc64le, s390x, x86_64

3. Description:

The GNU Privacy Guard (GnuPG or GPG) is a tool for encrypting data and
creating digital signatures, compliant with OpenPGP and S/MIME standards.

The following packages have been upgraded to a later upstream version:
gnupg2 (2.2.20). (BZ#1663944)

Security Fix(es):

* GnuPG: interaction between the sks-keyserver code and GnuPG allows for a
Certificate Spamming Attack which leads to persistent DoS (CVE-2019-13050)

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 8.3 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/):

1726146 – CVE-2019-13050 GnuPG: interaction between the sks-keyserver code and GnuPG allows for a Certificate Spamming Attack which leads to persistent DoS

6. Package List:

Red Hat Enterprise Linux BaseOS (v. 8):

Source:
gnupg2-2.2.20-2.el8.src.rpm

aarch64:
gnupg2-2.2.20-2.el8.aarch64.rpm
gnupg2-debuginfo-2.2.20-2.el8.aarch64.rpm
gnupg2-debugsource-2.2.20-2.el8.aarch64.rpm
gnupg2-smime-2.2.20-2.el8.aarch64.rpm
gnupg2-smime-debuginfo-2.2.20-2.el8.aarch64.rpm

ppc64le:
gnupg2-2.2.20-2.el8.ppc64le.rpm
gnupg2-debuginfo-2.2.20-2.el8.ppc64le.rpm
gnupg2-debugsource-2.2.20-2.el8.ppc64le.rpm
gnupg2-smime-2.2.20-2.el8.ppc64le.rpm
gnupg2-smime-debuginfo-2.2.20-2.el8.ppc64le.rpm

s390x:
gnupg2-2.2.20-2.el8.s390x.rpm
gnupg2-debuginfo-2.2.20-2.el8.s390x.rpm
gnupg2-debugsource-2.2.20-2.el8.s390x.rpm
gnupg2-smime-2.2.20-2.el8.s390x.rpm
gnupg2-smime-debuginfo-2.2.20-2.el8.s390x.rpm

x86_64:
gnupg2-2.2.20-2.el8.x86_64.rpm
gnupg2-debuginfo-2.2.20-2.el8.x86_64.rpm
gnupg2-debugsource-2.2.20-2.el8.x86_64.rpm
gnupg2-smime-2.2.20-2.el8.x86_64.rpm
gnupg2-smime-debuginfo-2.2.20-2.el8.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-2019-13050
https://access.redhat.com/security/updates/classification/#moderate
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.3_release_notes/

8. Contact:

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

Copyright 2020 Red Hat, Inc.
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