CVE-2018-10896
First published: Wed Aug 01 2018(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Canonical cloud-init | >=0.6.2<18.4 |
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Reference Links
Frequently Asked Questions
What is CVE-2018-10896?
CVE-2018-10896 is a vulnerability in the default cloud-init configuration that disables cloud-init's deletion of ssh host keys, potentially leading to sharing of ssh host keys between instances.
What is the severity of CVE-2018-10896?
CVE-2018-10896 has a severity rating of 7.1 (high).
How does CVE-2018-10896 affect cloud-init?
CVE-2018-10896 affects cloud-init versions 0.6.2 and newer by disabling the deletion of ssh host keys in the default configuration.
How can I fix CVE-2018-10896?
To fix CVE-2018-10896, update cloud-init to a version newer than 0.6.2 and ensure that ssh_deletekeys is not set to 0 in the cloud-init configuration.
Where can I find more information about CVE-2018-10896?
You can find more information about CVE-2018-10896 at the following references: [1] [2] [3]
- agent/remedy
- agent/type
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/weakness
- agent/author
- agent/references
- agent/softwarecombine
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/severity
- agent/tags
- agent/first-publish-date
- agent/event
- agent/source
- vendor/canonical
- canonical/canonical cloud-init
- version/canonical cloud-init/0.6.2