Vulnerability in Google Guest-Oslogin
CVE-2020-8907
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.
EPSS: 0.003 (23.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Google Guest-oslogin
- Google Llc Guest-oslogin — versions 20190304, 20200507
- Opensuse Leap — versions 15.1, 15.2
Weakness classification (CWE)
References
- cve-coordination@google.com (x_refsource_CONFIRM, Patch, Third Party Advisory)
- cve-coordination@google.com (Exploit, Third Party Advisory, x_refsource_MISC)
- cve-coordination@google.com (x_refsource_MISC, Vendor Advisory)
- cve-coordination@google.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
- cve-coordination@google.com (vendor-advisory, Mailing List, Third Party Advisory, x_refsource_SUSE)
Frequently asked questions
- What is CVE-2020-8907?
- CVE-2020-8907 is a high-severity vulnerability in Google Guest-Oslogin, classified under Incorrect Default Permissions. CVSS score: 7.8/10. Published 2020-06-22.
- How severe is CVE-2020-8907?
- High severity. CVSS v3 base score is 7.8 out of 10.