Use of Insufficiently Random Values The advisory has been revoked - it doesn't affect any version of package cloud-init (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1604-CLOUDINIT-1128315
- published20 Jan 2022
- disclosed5 Feb 2020
Introduced: 5 Feb 2020
CVE-2020-8631 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:16.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream cloud-init package and not the cloud-init package as distributed by Ubuntu.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2020-8631
- 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