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AUSCERT External Security Bulletin Redistribution
ESB-2020.2506
cloud-init security, bug fix, and enhancement update
22 July 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: cloud-init
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 8
Red Hat Enterprise Linux WS/Desktop 8
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Provide Misleading Information -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-10896
Original Bulletin:
https://access.redhat.com/errata/RHSA-2020:3050
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running cloud-init check for an updated version of the software for
their operating system.
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Red Hat Security Advisory
Synopsis: Low: cloud-init security, bug fix, and enhancement update
Advisory ID: RHSA-2020:3050-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3050
Issue date: 2020-07-21
CVE Names: CVE-2018-10896
=====================================================================
1. Summary:
An update for cloud-init is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact
of Low. 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) - noarch
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.
The following packages have been upgraded to a later upstream version:
cloud-init (19.4). (BZ#1811912)
Security Fix(es):
* cloud-init: default configuration disabled deletion of SSH host keys
(CVE-2018-10896)
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 8.2 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/):
1598831 - CVE-2018-10896 cloud-init: default configuration disabled deletion
of SSH host keys
1811912 - [RHEL-8.2.1] cloud-init rebase to 19.4
1831646 - [RHEL8.2.1] Race condition of starting cloud-init and NetworkManager
1844366 - [rhel-8.2.1]Incorrect ds-identify check in cloud-init-generator
1850456 - [RHEL8.2.1] Do not log IMDSv2 token values into cloud-init.log
6. Package List:
Red Hat Enterprise Linux AppStream (v. 8):
Source:
cloud-init-19.4-1.el8.7.src.rpm
noarch:
cloud-init-19.4-1.el8.7.noarch.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-2018-10896
https://access.redhat.com/security/updates/classification/#low
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/
8.2_release_notes/index
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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