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Red Hat Enterprise Linux 7 Update: RHSA-2019-0597-01 SSH Security Issue

red hat
Calendar Grey March 18, 2019
Dist Redhat Esm H88
Canonical announces an important security patch for cloud-init that resolves vulnerabilities related to SSH configurations in AWS environments.
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.
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.

Topics%20covered

Topics Covered

security advisory security update Red Hat Enterprise Linux moderate impact SSH keys cloud-init

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

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/


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

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 security update Red Hat Enterprise Linux moderate impact SSH keys cloud-init

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

Bugs Fixed

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

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