Secret leaks in logs for vSphere Provider kube-controller-manager
Published Dec 7, 2020
6.3
MEDIUMCVSS 3.1
EPSS 0.51%
Description
In Kubernetes clusters using VSphere as a cloud provider, with a logging level set to 4 or above, VSphere cloud credentials will be leaked in the cloud controller manager's log. This affects < v1.19.3.
Affected products
-
- Version < 1.19.3StatusaffectedConstraints-
- 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 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Kubernetes | Kubernetes | n/a |
|
- < 1.19.3
No data.
Red Hat OpenShift Container Platform 4.6
openshift-0:4.6.0-202012051246.p0.git.94231.efc9027.el7
Fixed · RHSA-2020:5260
Red Hat OpenShift Container Platform 4.7
openshift4/ose-hyperkube:v4.7.0-202102130115.p0
Fixed · RHSA-2020:5633
Red Hat OpenShift Container Platform 3.11
atomic-openshift
Not affected
Red Hat Storage 3
heketi
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat OpenShift Container Platform 4.6 | openshift-0:4.6.0-202012051246.p0.git.94231.efc9027.el7 | Fixed | RHSA-2020:5260 |
| Red Hat OpenShift Container Platform 4.7 | openshift4/ose-hyperkube:v4.7.0-202102130115.p0 | Fixed | RHSA-2020:5633 |
| Red Hat OpenShift Container Platform 3.11 | atomic-openshift | Not affected | n/a |
| Red Hat Storage 3 | heketi | Not affected | n/a |
github.com/kubernetes/kubernetes
Go
Introduced 0 Fixed 1.19.3k8s.io/kubernetes
Go
Introduced 0 Fixed 1.19.3
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/kubernetes/kubernetes | 0 | 1.19.3 |
| Go | k8s.io/kubernetes | 0 | 1.19.3 |
Remediation
Vendor solution
Do not enable verbose logging in production (log level >= 4), limit access to logs.
Red Hat statement
OpenShift Container Platform (OCP) versions before 4.6 are not affected by this vulnerability as they are based on Kubernetes versions before 1.19. Only Kubernetes versions 1.19.0 through 1.19.2 are affected by this vulnerability.
Red Hat mitigation
Ensure that the logging level is below 4. Additionally, protect unauthorized access to cluster logs. For OCP, the logging level for core components can be configured using operators, e.g. for kube-controller-manager: https://docs.openshift.com/container-platform/latest/rest_api/operator_apis/kubecontrollermanager-operator-openshift-io-v1.html#specification In OCP, a logging level of "Debug" is equivalent to 4: https://github.com/openshift/api/blob/master/operator/v1/types.go#L96 The default logging level is "Normal", which is equivalent to 2. Clusters running with the default level are not vulnerable to this issue.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
2 other sources (GHSA, CVE.org) ▾
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
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 (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.51% (0.00511) | 41.41th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.51% (0.00511) | 42.57th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.05% (0.00047) | 17.61th | v3 (v2023.03.01) |
| May 8, 2024 | 0.05% (0.00047) | 16.28th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.05% (0.00047) | 14.26th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00890) | 30.33th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.41% (0.01412) | 50.22th | v2 (v2022.01.01) |
| Feb 3, 2022 | 3.63% (0.03630) | 71.73th | v1 |
| Jan 6, 2022 | 3.63% (0.03630) | 71.48th | v1 |
| Jan 5, 2022 | 0.83% (0.00833) | 58.90th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.83% (0.00833) | 0.00th | v1 |
References (11)
- https://access.redhat.com/security/cve/CVE-2020-8563 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1886635 Issue Tracking
- https://github.com/advisories/GHSA-5xfg-wv98-264m Advisory
- https://github.com/kubernetes/kubernetes/issues/95621 x_refsource_CONFIRMThird Party Advisory
- https://github.com/kubernetes/kubernetes/pull/95236
- https://github.com/kubernetes/kubernetes/pull/95236/commits/247f6dd09299bc7893c1e0affea11c0255025b96
- https://groups.google.com/g/kubernetes-announce/c/ScdmyORnPDk
- https://groups.google.com/g/kubernetes-security-discuss/c/vm-HcrFUOCs/m/36utxAM5CwAJ mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2020-8563
- https://security.netapp.com/advisory/ntap-20210122-0006 x_refsource_CONFIRMThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2020-8563
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2020-8563 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1886635 | Issue Tracking | |
| https://github.com/advisories/GHSA-5xfg-wv98-264m | Advisory | |
| https://github.com/kubernetes/kubernetes/issues/95621 | x_refsource_CONFIRMThird Party Advisory | |
| https://github.com/kubernetes/kubernetes/pull/95236 | ||
| https://github.com/kubernetes/kubernetes/pull/95236/commits/247f6dd09299bc7893c1e0affea11c0255025b96 | ||
| https://groups.google.com/g/kubernetes-announce/c/ScdmyORnPDk | ||
| https://groups.google.com/g/kubernetes-security-discuss/c/vm-HcrFUOCs/m/36utxAM5CwAJ | mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2020-8563 | ||
| https://security.netapp.com/advisory/ntap-20210122-0006 | x_refsource_CONFIRMThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2020-8563 |
Change history (0)
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