CVE-2018-10896

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2018-10896
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.

7.1 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

3.6 /10

CVSS v2.0 : LOW

V2 Legend

Vector : AV:L/AC:L/Au:N/C:P/I:P/A:N

Exploitability : 3.9 / Impact : 4.9

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact NONE

References
Link Resource
https://bugs.launchpad.net/cloud-init/+bug/1781094 Patch Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1574338 Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10896 Issue Tracking Patch Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:canonical:cloud-init:*:*:*:*:*:*:*:*
History

13 Feb 2023, 04:51

Type Values Removed Values Added
Summary 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. 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.
CWE NVD-CWE-noinfo CWE-321
References
  • {'url': 'https://access.redhat.com/security/cve/CVE-2018-10896', 'name': 'https://access.redhat.com/security/cve/CVE-2018-10896', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2020:3898', 'name': 'https://access.redhat.com/errata/RHSA-2020:3898', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://bugzilla.redhat.com/show_bug.cgi?id=1598831', 'name': 'https://bugzilla.redhat.com/show_bug.cgi?id=1598831', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2020:3050', 'name': 'https://access.redhat.com/errata/RHSA-2020:3050', 'tags': [], 'refsource': 'MISC'}
  • {'url': 'https://access.redhat.com/errata/RHSA-2020:3644', 'name': 'https://access.redhat.com/errata/RHSA-2020:3644', 'tags': [], 'refsource': 'MISC'}

02 Feb 2023, 16:18

Type Values Removed Values Added
Summary 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. 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.
References
  • (MISC) https://access.redhat.com/security/cve/CVE-2018-10896 -
  • (MISC) https://access.redhat.com/errata/RHSA-2020:3898 -
  • (MISC) https://bugzilla.redhat.com/show_bug.cgi?id=1598831 -
  • (MISC) https://access.redhat.com/errata/RHSA-2020:3050 -
  • (MISC) https://access.redhat.com/errata/RHSA-2020:3644 -
Information

Published : 2018-08-01 17:29

Updated : 2023-12-10 12:44

NVD link : CVE-2018-10896

Mitre link : CVE-2018-10896

CVE.ORG link : CVE-2018-10896

JSON object : View

Products Affected

canonical

  • cloud-init
CWE
CWE-321

Use of Hard-coded Cryptographic Key

NVD-CWE-noinfo