CVE catalog
CVE-2020-8631
cloud-init: CVE-2020-8631
- Severity
- High · CVSS 8.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.43% · Oct 27, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | cloud-init | sid | 26.2-1 | fixed |
| Debian | cloud-init | forky | 26.2-1 | fixed |
| Debian | cloud-init | trixie | 25.1.4-1+deb13u1 | fixed |
| Debian | cloud-init | bookworm | 22.4.2-1+deb12u4 | fixed |
| Suse | cloud-init | linux enterprise module for public cloud 12 | 19.4-37.39.1 | fixed |
| Suse | cloud-init | linux enterprise module for public cloud 15 | 19.4-5.24.1 | fixed |
| Opensuse | cloud-init | leap 15.1 | 19.4-lp151.2.15.1 | fixed |
| Suse | cloud-init | linux enterprise module for public cloud 15 sp1 | 19.4-8.17.1 | fixed |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1149-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1154-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1155-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1156-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1156-0ubuntu2 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1160-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1176-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1182-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1189-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1192-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1192-0ubuntu2 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1200-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1208-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1209-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1212-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1246-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.7~bzr1256-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.8-1-g3705bb5-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.8-1-g3705bb5-0ubuntu1~16.04.3 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.8-49-g9e904bb-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.8-49-g9e904bb-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.8-49-g9e904bb-0ubuntu1~16.04.3 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.8-49-g9e904bb-0ubuntu1~16.04.4 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.9-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.9-48-g1c795b9-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.9-90-g61eb03fe-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.9-113-g513e99e0-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.9-153-g16a7302f-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.9-153-g16a7302f-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.9-233-ge586fe35-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 0.7.9-233-ge586fe35-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | cloud-init | pro | 17.1-27-geb292c18-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 17.1-46-g7acc9e68-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 17.2-35-gf576b2a2-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | cloud-init | pro | 18.2-4-g05926e48-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 18.2-4-g05926e48-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | cloud-init | pro | 18.3-9-g2e62cb8a-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | cloud-init | pro | 18.4-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | cloud-init | pro | 18.5-21-g8ee294d5-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 18.5-45-g3554ffe8-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 19.1-1-gbaa47854-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 19.2-24-ge7881d5c-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 19.2-36-g059d049c-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 19.2-36-g059d049c-0ubuntu2~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 19.3-41-gc4735dd3-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 19.4-33-gbb4131a2-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 20.2-45-g5f7825e2-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 20.3-2-g371b392c-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 20.4-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 20.4-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | cloud-init | pro | 20.4.1-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 21.1-19-gbad84ad4-0ubuntu1~16.04.1 | vulnerable |
| Ubuntu | cloud-init | pro | 21.1-19-gbad84ad4-0ubuntu1~16.04.2 | vulnerable |
| Ubuntu | cloud-init | pro | 21.1-19-gbad84ad4-0ubuntu1~16.04.4 | vulnerable |
| Ubuntu | cloud-init | pro | 21.1-19-gbad84ad4-0ubuntu1~16.04.4+esm2 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.1-18-gd4f70470-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.1-25-g17a15f9e-0ubuntu1~17.10.1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.1-25-g17a15f9e-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.1-27-geb292c18-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.1-41-g76243487-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.1-46-g7acc9e68-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.1-51-g05b2308a-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.1-53-ga5dc0f42-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.1-58-g703241a3-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.1-60-ga30a3bb5-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.2-1-g4089e20c-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.2-9-gdf24daa8-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.2-13-g6299e8d0-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.2-20-g32a6a176-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.2-25-gc03bdd3d-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.2-30-gf7deaf15-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 17.2-34-g644048e3-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.1-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.1-5-g40e77380-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.1-17-g97012fbb-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.1-23-gde34dc7c-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.1-26-g685f9901-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.1-35-ge0f644b7-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.1-35-ge0f644b7-0ubuntu2 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.2-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.2-4-g05926e48-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.2-4-g05926e48-0ubuntu2 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.2-9-g49b562c9-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.2-14-g6d48d265-0ubuntu1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.2-27-g6ef92c98-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.3-9-g2e62cb8a-0ubuntu1~18.04.2 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.4-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.5-21-g8ee294d5-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 18.5-45-g3554ffe8-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 19.1-1-gbaa47854-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 19.2-24-ge7881d5c-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 19.2-36-g059d049c-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 19.2-36-g059d049c-0ubuntu2~18.04.1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 19.3-41-gc4735dd3-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 19.4-33-gbb4131a2-0ubuntu1~18.04.1 | vulnerable |
| Ubuntu | cloud-init | 18.04 | 20.2-45-g5f7825e2-0ubuntu1~18.04.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | cloud-init | source | sid | 19.4-2 | not yet assigned | Not reported | [951362] |
| Debian | cloud-init | source | forky | 19.4-2 | not yet assigned | Not reported | [951362] |
| Debian | cloud-init | source | trixie | 19.4-2 | not yet assigned | Not reported | [951362] |
| Debian | cloud-init | source | bookworm | 19.4-2 | not yet assigned | Not reported | [951362] |
| Suse | cloud-init | rpm | linux enterprise module for public cloud 12 | 19.4-37.39.1 | Not reported | SUSE-SU-2020:0818-1 | Not reported |
| Suse | cloud-init | rpm | linux enterprise module for public cloud 15 | 19.4-5.24.1 | Not reported | SUSE-SU-2020:0585-1 | Not reported |
| Opensuse | cloud-init | rpm | leap 15.1 | 19.4-lp151.2.15.1 | Not reported | OPENSUSE-SU-2020:0400-1 | Not reported |
| Suse | cloud-init | rpm | linux enterprise module for public cloud 15 sp1 | 19.4-8.17.1 | Not reported | SUSE-SU-2020:0751-1 | Not reported |
| Ubuntu | cloud-init | deb | 18.04 | 20.2-45-g5f7825e2-0ubuntu1~18.04.1 | Not reported | UBUNTU-CVE-2020-8631 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [cloud-init]Fixed
Details (2)
22.4.2-1+deb12u4· all · bookwormFixed · Fixed:
19.4-2dsa · cloud-init · debian · bookworm; dsa · cloud-init · debian · 12
22.4.2-1+deb12u4· all · bookwormFixed · Fixed:
19.4-2dsa · cloud-init · debian · bookworm; dsa · cloud-init · debian · 12
[Debian 13 (Trixie)]
- [cloud-init]Fixed
Details (2)
25.1.4-1+deb13u1· all · trixieFixed · Fixed:
19.4-2dsa · cloud-init · debian · 13
25.1.4-1+deb13u1· all · trixieFixed · Fixed:
19.4-2dsa · cloud-init · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2020_3898.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-8631]
- [https://osv.dev/vulnerability/DLA-2113-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:0585-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:0751-1]
- [https://osv.dev/vulnerability/SUSE-SU-2020:0818-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-8631]
- [https://osv.dev/vulnerability/openSUSE-SU-2020:0400-1]
- [https://security-tracker.debian.org/tracker/CVE-2020-8631]
- [https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-8631.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2020/wid-sec-w-2026-0012.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]