Priviged Escalation in Google Cloud Platform's Guest-OSLogin
Published Jun 22, 2020
9.3
CRITICALCVSS 4.0
EPSS 0.31%
Description
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 products
-
- Version 20190304StatusaffectedConstraints<20200507
- Version 20200507StatusunaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Google LLC | Guest-Oslogin | unaffected |
|
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
1 other source (NVD) ▾
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed May 21, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.31% (0.00309) | 21.44th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.31% (0.00309) | 23.92th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.08% (0.00077) | 33.63th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.08% (0.00077) | 33.36th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00077) | 31.32th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00950) | 28.61th | v2 (v2022.01.01) |
| Jan 6, 2022 | 2.28% (0.02277) | 50.43th | v1 |
| Jan 5, 2022 | 0.52% (0.00517) | 29.49th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.52% (0.00517) | 0.00th | v1 |
References (5)
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00037.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00047.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- https://cloud.google.com/support/bulletins/#gcp-2020-008 x_refsource_MISCVendor Advisory
- https://github.com/GoogleCloudPlatform/guest-oslogin/pull/29 x_refsource_CONFIRMPatchThird Party Advisory
- https://gitlab.com/gitlab-com/gl-security/gl-redteam/red-team-tech-notes/-/tree/master/oslogin-privesc-june-2020 x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00037.html | vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory | |
| http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00047.html | vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory | |
| https://cloud.google.com/support/bulletins/#gcp-2020-008 | x_refsource_MISCVendor Advisory | |
| https://github.com/GoogleCloudPlatform/guest-oslogin/pull/29 | x_refsource_CONFIRMPatchThird Party Advisory | |
| https://gitlab.com/gitlab-com/gl-security/gl-redteam/red-team-tech-notes/-/tree/master/oslogin-privesc-june-2020 | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.