Vulnerability Intelligence Report
Priviged Escalation in Google Cloud Platform's Guest-OSLogin
CVE-2020-8933
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.
No Active Exploit Signals
CVSS Base Score
9.3
CRITICAL
EPSS Probability:0.35%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-276 ↗CWE-276 Incorrect Default Permissions
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Google LLC | guest-oslogin | 20190304 < 20200507 (affected), 20200507 (unaffected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
EPSS Score
0.353%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Google LLC · Vendor · USA |
| Reserved | 2020-02-12T00:00:00 |
| Published | 2020-06-22T13:45:26 |
| Last Updated | 2024-08-04T10:12:10 |
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