CVE-2018-10896

cloud-init: default configuration disabled deletion of SSH host keys

Published Aug 1, 2018 CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
Description
The default cloud-init configuration, in cloud-init 0.6.2 and newer, included "ssh_deletekeys: 0", disabling cloud-init's deletion of ssh host keys. In some environments, this could lead to instances created by cloning a golden master or template system, sharing ssh host keys, and being able to impersonate one another or conduct man-in-the-middle attacks.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2018-2955 The default cloud-init configuration, in cloud-init 0.6.2 and newer, included "ssh_deletekeys: 0", disabling cloud-init's deletion of ssh host keys. In some environments, this could lead to instances created by cloning a golden master or template system, sharing ssh host keys, and being able to impersonate one another or conduct man-in-the-middle attacks.
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00047}

epss

{'score': 0.00033}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Aug 5, 2024, 7:54 AM
Reserved
May 9, 2018, 12:00 AM
Status
Modified
Published
Aug 1, 2018, 5:29 PM
Modified
Jun 17, 2026, 1:34 AM
Severity
Low
Public date
Jul 6, 2018, 12:00 AM