CVEvulnerability

CVE-2018-10896

7.1 HIGH Published 2018-08-01 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2018-08-01
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.1 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
CVSS 3.0 ([email protected])
4.6 MEDIUM — CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0 ([email protected])
3.6 LOW — AV:L/AC:L/Au:N/C:P/I:P/A:N
Weaknesses
CWE-321

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 configurations

• canonical cloud-init (>= 0.6.2 < 18.4)

Related

Weakness · CWE (1)

  • CWE-321 Use of Hard-coded Cryptographic Key weakness

References