CVE-2020-8933
Google LLC · published 2020-06-22
Source record Collected from the National Vulnerability Database (NVD)
Description
Description by Google Inc. via the CVE Program.
A vulnerability in Google Cloud Platform's guest-oslogin versions between 20190304 and 20200507 allows a user that is only granted the role "roles/compute.osLogin" to escalate privileges to root. Using the membership to the "lxd" group, an attacker can attach host devices and filesystems. Within an lxc container, it is possible to attach the host OS filesystem and modify /etc/sudoers to then gain administrative privileges. All images created after 2020-May-07 (20200507) are fixed, and if you cannot update, we recommend you edit /etc/group/security.conf and remove the "lxd" user from the OS Login entry.
Status at the source
- NVD status: Modified
Affected products, as the source lists them
| Vendor | Product | Versions |
|---|---|---|
| Google LLC | guest-oslogin | 20190304 – before 20200507: affected 20200507: unaffected |
Added by CISA-ADP (Authorized Data Publisher)
| Vendor | Product | Versions |
|---|---|---|
| guest-oslogin | 20190304.00 – before 20200507: affected |
Products named in NVD's CPE match criteria (2)
cpe:2.3:a:google:guest-oslogin:*:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
DeSpy has not checked any unit, hardware revision or firmware. A product missing here is not a statement that it is unaffected.
Scores, as their sources published them
- CVSS 4.0: 9.3 CRITICAL — as published by Google Inc. (Secondary)
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1: 7.8 HIGH — as published by NIST (Primary)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0: 6.9 MEDIUM — as published by NIST (Primary)
AV:L/AC:M/Au:N/C:C/I:C/A:C - SSVC — CISA's assessment (SSVC 2.0.3, CISA Coordinator): Exploitation: none · Automatable: no · Technical impact: total
DeSpy does not score records. These are the sources' own values.
Weaknesses
Sources
References the source lists
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00037.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00047.html
- https://cloud.google.com/support/bulletins/#gcp-2020-008
- https://github.com/GoogleCloudPlatform/guest-oslogin/pull/29
- https://gitlab.com/gitlab-com/gl-security/gl-redteam/red-team-tech-notes/-/tree/master/oslogin-privesc-june-2020
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00037.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00047.html
- https://cloud.google.com/support/bulletins/#gcp-2020-008
- https://github.com/GoogleCloudPlatform/guest-oslogin/pull/29
- https://gitlab.com/gitlab-com/gl-security/gl-redteam/red-team-tech-notes/-/tree/master/oslogin-privesc-june-2020
Source dates: published 2020-06-22, last changed 2026-06-17. DeSpy's copy of this version is dated 2026-09-28.
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