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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.

🗓️ 18 Aug 2020 07:00:00Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 4 Views

Cloud-init 0.6.2+ defaults ssh_deletekeys to 0, causing host keys to be reused in cloned instances.

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18 Aug 2020 07:00Current
5.2Medium risk
Vulners AI Score5.2
CVSS 23.6
CVSS 3.17.1
CVSS 34.6
EPSS0.00354
4