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

Synopsis:          Moderate: cloud-init security update
Advisory ID:       RHSA-2019:0597-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2019:0597
Issue date:        2019-03-18
CVE Names:         CVE-2019-0816 
====================================================================
1. Summary:

An update for cloud-init 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 (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) - aarch64, ppc64le, s390x

3. Description:

The cloud-init packages provide a set of init scripts for cloud instances.
Cloud instances need special scripts to run during initialization to
retrieve and install SSH keys, and to let the user run various scripts.

Security Fix(es):

* cloud-init: extra ssh keys added to authorized_keys on the Azure platform
(CVE-2019-0816)

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/):

1680165 - CVE-2019-0816 cloud-init: extra ssh keys added to authorized_keys on the Azure platform

6. Package List:

Red Hat Enterprise Linux Server (v. 7):

Source:
cloud-init-18.2-1.el7_6.2.src.rpm

ppc64:
cloud-init-18.2-1.el7_6.2.ppc64.rpm

ppc64le:
cloud-init-18.2-1.el7_6.2.ppc64le.rpm

s390x:
cloud-init-18.2-1.el7_6.2.s390x.rpm

x86_64:
cloud-init-18.2-1.el7_6.2.x86_64.rpm

Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7):

Source:
cloud-init-18.2-1.el7_6.2.src.rpm

aarch64:
cloud-init-18.2-1.el7_6.2.aarch64.rpm

ppc64le:
cloud-init-18.2-1.el7_6.2.ppc64le.rpm

s390x:
cloud-init-18.2-1.el7_6.2.s390x.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-2019-0816
https://access.redhat.com/security/updates/classification/#moderate
https://support.microsoft.com/en-us/topic/extraneous-ssh-public-keys-added-to-authorized-keys-file-on-linux-vm-51b46087-8035-2cc9-48e4-6bb62ce7b314

8. Contact:

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

Copyright 2019 Red Hat, Inc.
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