VDB
CVE-2020-8933
CVE-2020-8933
PUBLISHED
CVSS 9.300000190734863 CRITICAL
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.
EPSS 0.35% · 28.2th percentile
Risk Scores
CVSS 4.0
9.300000190734863
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
EPSS Score
0.35%
28.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:16.04:LTS | gce-compute-image-packages | *, *, * |
| Ubuntu:20.04:LTS | gce-compute-image-packages | 0, 20190801-0ubuntu3, 20190801-0ubuntu1 |
| Ubuntu:14.04:LTS | gce-compute-image-packages | *, 0, 20160930-0ubuntu3~14.04.0 |
| Ubuntu:18.04:LTS | gce-compute-image-packages | *, *, * |
Timeline
- Jun 22, 2020 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 2, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 5, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2020-8933 third-party-advisory
- https://cloud.google.com/support/bulletins/#gcp-2020-008 third-party-advisory
- https://github.com/GoogleCloudPlatform/guest-oslogin/pull/29 third-party-advisory
- https://gitlab.com/gitlab-com/gl-security/gl-redteam/red-team-tech-notes/-/tree/master/oslogin-privesc-june-2020 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2020-8933 third-party-advisory