The default cloud-init configuration 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.
Find out more about CVE-2018-10896 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
CVSS3 Base Score | 4.6 |
---|---|
CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N |
Attack Vector | Local |
Attack Complexity | Low |
Privileges Required | Low |
User Interaction | Required |
Scope | Changed |
Confidentiality | Low |
Integrity Impact | Low |
Availability Impact | None |
Platform | Package | State |
---|---|---|
Red Hat Enterprise Linux 7 | cloud-init | Affected |
Red Hat Enterprise Linux 6 | cloud-init | Will not fix |