CVE-2018-10896

HIGH
7.1
CVSS Score
Published: August 1, 2018 at 05:00 PM UTC
Updated: June 17, 2026 at 01:34 AM UTC
1 product affected across 1 vendorCloud Init

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Severity
HIGH7.1
Exploit prediction
EPSS 0.4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

0.6.2 ≤ v < 18.40.6.2
Affected range stops below 18.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

x_refsource_CONFIRMPatchThird Party Advisory
https://bugs.launchpad.net/cloud-init/+bug/1781094
x_refsource_CONFIRMIssue TrackingThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1574338
x_refsource_CONFIRMIssue TrackingPatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10896

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-321NVD-CWE-noinfo

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