CVE-2020-8933: 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 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.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2020-8933?
CVE-2020-8933 has a critical severity level due to its potential for privilege escalation to root.
How do I fix CVE-2020-8933?
To fix CVE-2020-8933, you should update Google Guest-OSLogin to a version later than 20200507.
Which systems are affected by CVE-2020-8933?
CVE-2020-8933 affects Google Guest-OSLogin versions between 20190304 and 20200507 as well as openSUSE Leap 15.1 and 15.2.
What type of attack does CVE-2020-8933 enable?
CVE-2020-8933 enables a user with specific roles to escalate privileges and gain root access.
Who is at risk from CVE-2020-8933?
Users with the 'roles/compute.osLogin' role on affected Google Cloud Platform systems are at risk from CVE-2020-8933.