Vulnerability Report

CVE-2020-8631

Title: Canonical Cloud-Init Cryptographic Failures

Other

Proof Of Concept

No public PoC currently indexed for CVE-2020-8631.

CWE Category CWE-330
Published Date Feb 05, 2020
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 5.5 CVSS v3.1
Exploit Probability (EPSS)
0.44%

Vulnerability Summary

CVE-2020-8631: cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for attackers to predict passwords, because rand_str in cloudinit/util.py calls the random.choice function.

Impacted Vendors

C
canonical 1

Reference Links

http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00042.html https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795 https://github.com/canonical/cloud-init/pull/204 https://lists.debian.org/debian-lts-announce/2020/02/msg00021.html http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00042.html https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1860795 https://github.com/canonical/cloud-init/pull/204 https://lists.debian.org/debian-lts-announce/2020/02/msg00021.html
CVSS v3.1
Source Entity [email protected]
Severity MEDIUM
5.5
Attack Vector
LOCAL
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v2.0
Source Entity [email protected]
Severity LOW
2.1
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:L/AC:L/Au:N/C:P/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2020-8631 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Stack

No specific products linked.