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Red Hat: CVE-2018-10896: CVE-2018-10896 cloud-init: default configuration disabled deletion of SSH host keys (Multiple Advisories)

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Red Hat: CVE-2018-10896: CVE-2018-10896 cloud-init: default configuration disabled deletion of SSH host keys (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:N)
Published
08/01/2018
Created
07/23/2020
Added
07/23/2020
Modified
12/15/2023

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.

Solution(s)

  • redhat-upgrade-cloud-init

References

  • CVE-2018-10896
  • RHSA-2020:3050
  • RHSA-2020:3644
  • RHSA-2020:3898

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