CVE-2020-8907: Priviged Escalation in Google Cloud Platform's Guest-OSLogin
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.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2020-8907?
CVE-2020-8907 has a high severity rating due to the potential for privilege escalation.
How do I fix CVE-2020-8907?
To mitigate CVE-2020-8907, update Google Guest-OSLogin to a version later than 20200507.
What platforms are affected by CVE-2020-8907?
CVE-2020-8907 affects Google Cloud Platform's Guest-OSLogin and specific versions of openSUSE Leap.
What type of attack does CVE-2020-8907 enable?
CVE-2020-8907 allows an attacker to escalate privileges to root by abusing the docker group.
Who is at risk from CVE-2020-8907?
Users with the 'roles/compute.osLogin' role on affected systems are at risk from CVE-2020-8907.