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Red Hat Enterprise Linux 7: RHSA-2020-3898-01 Moderate Cloud-Init Fixes

red hat
Calendar Grey September 29, 2020
Dist Redhat Esm H88
A new release of cloud-init for Red Hat Enterprise Linux resolves vulnerabilities and bug fixes categorized with a moderate severity rating.
An update for cloud-init is now available for Red Hat Enterprise Linux 7

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

Summary

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#1803094)
Security Fix(es):
* cloud-init: Use of random.choice when generating random password (CVE-2020-8631)
* cloud-init: Too short random password length in cc_set_password in config/cc_set_passwords.py (CVE-2020-8632)
* 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 7.9 Release Notes linked from the References section.

Topics%20covered

Topics Covered

security advisory moderate Red Hat bug fix security impact cloud-init

References

https://access.redhat.com/security/cve/CVE-2018-10896 https://access.redhat.com/security/cve/CVE-2020-8631 https://access.redhat.com/security/cve/CVE-2020-8632 https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.9_release_notes/index

Package List

Red Hat Enterprise Linux Server (v. 7):
Source: cloud-init-19.4-7.el7.src.rpm
ppc64: cloud-init-19.4-7.el7.ppc64.rpm
ppc64le: cloud-init-19.4-7.el7.ppc64le.rpm
s390x: cloud-init-19.4-7.el7.s390x.rpm
x86_64: cloud-init-19.4-7.el7.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/


Advisory ID: RHSA-2020:3898-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:3898
Issue date: 2020-09-29

Topic

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 impactof Moderate. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available for each vulnerability fromthe CVE link(s) in the References section.

Topics%20covered

Topics Covered

security advisory moderate Red Hat bug fix security impact cloud-init

Relevant Releases Architectures

Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64

Bugs Fixed

1574338 - CVE-2018-10896 cloud-init: default configuration disabled deletion of SSH host keys [rhel-7]

1598831 - CVE-2018-10896 cloud-init: default configuration disabled deletion of SSH host keys

1748015 - [cloud-init][RHEL7] /etc/resolv.conf lose config after reboot (initial instance is ok)

1772505 - [RHEL7] swapon fails with "swapfile has holes" when created on a xfs filesystem by cloud-init

1793652 - Support for AWS IMDS v2 (available in cloud-init 19.4)

1798728 - CVE-2020-8632 cloud-init: Too short random password length in cc_set_password in config/cc_set_passwords.py

1798731 - CVE-2020-8631 cloud-init: Use of random.choice when generating random password

1803094 - [RHEL-7.9] cloud-init rebase to 19.4

1821679 - [cloud-init test] Cloud-init rebase to 19.4 testing in rhel-7.9

1821999 - [RHEL7.9] Do not log IMDSv2 token values into cloud-init.log

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