High severity · published Aug 1, 2018
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
7.1
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CL
cloud-init · Canonical
0.6.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2018-10896
CVE.org
https://www.cve.org/CVERecord?id=CVE-2018-10896
Patch
https://bugs.launchpad.net/cloud-init/+bug/1781094
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1574338
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10896
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