What is CVE-2020-8631?

CVE-2020-8631 is a medium-severity vulnerability in Canonical Cloud-Init, classified under Use of Insufficiently Random Values. CVSS score: 5.5/10. Published 2020-02-05.

How severe is CVE-2020-8631?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Canonical Cloud-Init

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.

EPSS: 0.004 (35.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Canonical Cloud-init
Debian Debian_linux — versions 8.0
Opensuse Leap — versions 15.1
N/a — versions n/a

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

References

cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC)
cve@mitre.org (Patch, Third Party Advisory, x_refsource_MISC, Issue Tracking)
cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
cve@mitre.org (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)

Frequently asked questions

What is CVE-2020-8631?: CVE-2020-8631 is a medium-severity vulnerability in Canonical Cloud-Init, classified under Use of Insufficiently Random Values. CVSS score: 5.5/10. Published 2020-02-05.
How severe is CVE-2020-8631?: Medium severity. CVSS v3 base score is 5.5 out of 10.