CVE-2020-8933
HIGHGoogle guest-oslogin 20190304-20200507 - Privilege Escalation via lxd Group Membership
Title source: llmDescription
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.
References (5)
Core 5
Core References
Patch, Third Party Advisory x_refsource_confirm
https://github.com/GoogleCloudPlatform/guest-oslogin/pull/29
Exploit, Third Party Advisory x_refsource_misc
https://gitlab.com/gitlab-com/gl-security/gl-redteam/red-team-tech-notes/-/tree/master/oslogin-privesc-june-2020
Vendor Advisory x_refsource_misc
https://cloud.google.com/support/bulletins/#gcp-2020-008
Mailing List, Third Party Advisory vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00037.html
Mailing List, Third Party Advisory vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00047.html
Scores
CVSS v3
7.8
EPSS
0.0008
EPSS Percentile
23.2%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
total
Details
CWE
CWE-276
Status
published
Products (3)
google/guest-oslogin
20190304.00 - 20200507.00
opensuse/leap
15.1
opensuse/leap
15.2
Published
Jun 22, 2020
Tracked Since
Feb 18, 2026