CVE-2020-8933

Name: CVE-2020-8933
Creator: NVD / NIST
Published: 2020-06-22T14:15:11.847+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2020-8933 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. 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. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

9.3/10

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

EPSS Probability

0.35%

27.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Google	Guest-Oslogin	>= 20190304.00, <= 20200507.00
Opensuse	Leap	15.1
Opensuse	Leap	15.2

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00037.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00047.htmlMailing List, Third Party Advisory
https://cloud.google.com/support/bulletins/#gcp-2020-008Vendor Advisory
https://github.com/GoogleCloudPlatform/guest-oslogin/pull/29Patch, Third Party Advisory
https://gitlab.com/gitlab-com/gl-security/gl-redteam/red-team-tech-notes/-/tree/master/oslogin-privesc-june-2020Exploit, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00037.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00047.htmlMailing List, Third Party Advisory
https://cloud.google.com/support/bulletins/#gcp-2020-008Vendor Advisory
https://github.com/GoogleCloudPlatform/guest-oslogin/pull/29Patch, Third Party Advisory
https://gitlab.com/gitlab-com/gl-security/gl-redteam/red-team-tech-notes/-/tree/master/oslogin-privesc-june-2020Exploit, Third Party Advisory

Timeline

Published: Jun 22, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-8933?

How severe is CVE-2020-8933?

CVE-2020-8933 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2020-8933?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-8933?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST