CVE-2020-8933CWE-276

Priviged Escalation in Google Cloud Platform's Guest-OSLogin

Critical · published June 22, 2020

CVSS v4.0
9.3
EPSS
0%
Percentile
27.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.3 · CRITICAL
Vector
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
0.00353 · 27.7th percentile
Weakness
CWE-276 · Incorrect Default Permissions
Published
2020-06-22T13:45Z
EPSS history
Timeline
  • 22 JUN 13:45Z
    Priviged Escalation in Google Cloud Platform's Guest-OSLogin
    cvelistv5