CVE-2020-8907
Publication date 22 June 2020
Last updated 24 July 2024
Ubuntu priority
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 their membership to the "docker" group, an attacker with this role is able to run docker and mount the host OS. Within docker, it is possible to modify the host OS filesystem and modify /etc/groups to 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 "docker" user from the OS Login entry.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| gce-compute-image-packages | 24.10 oracular |
Fixed 20190801-0ubuntu5
|
| 24.04 LTS noble |
Fixed 20190801-0ubuntu5
|
|
| 22.04 LTS jammy |
Fixed 20190801-0ubuntu5
|
|
| 20.04 LTS focal |
Fixed 20190801-0ubuntu4.1
|
|
| 18.04 LTS bionic |
Fixed 20190801-0ubuntu1~18.04.1
|
|
| 16.04 LTS xenial |
Fixed 20190801-0ubuntu1~16.04.1
|
|
| 14.04 LTS trusty | Ignored end of ESM support, was needed |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
7.8 · High
|
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |