CVE-2020-8564: Docker config secrets leaked when file is malformed and loglevel >= 4
First published: Fri Oct 09 2020(Updated: )
In Kubernetes clusters using a logging level of at least 4, processing a malformed docker config file will result in the contents of the docker config file being leaked, which can include pull secrets or other registry credentials. This affects < v1.19.3, < v1.18.10, < v1.17.13.
Credit: jordan@liggitt.net jordan@liggitt.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| go/k8s.io/kubernetes | <1.20.0-alpha.1 | 1.20.0-alpha.1 |
| go/github.com/kubernetes/kubernetes | <1.17.13 | 1.17.13 |
| go/github.com/kubernetes/kubernetes | >=1.18.0<1.18.10 | 1.18.10 |
| go/github.com/kubernetes/kubernetes | >=1.19.0<1.19.3 | 1.19.3 |
| redhat/kubernetes | <1.19.3 | 1.19.3 |
| redhat/kubernetes | <1.18.10 | 1.18.10 |
| redhat/kubernetes | <1.17.13 | 1.17.13 |
| redhat/atomic-openshift | <0:3.11.501-1.git.0.f8c4746.el7 | 0:3.11.501-1.git.0.f8c4746.el7 |
| redhat/openshift-clients | <0:4.6.0-202010081244.p0.git.3794.4743d24.el8 | 0:4.6.0-202010081244.p0.git.3794.4743d24.el8 |
| redhat/openshift | <0:4.6.0-202101160934.p0.git.94242.fc5242e.el7 | 0:4.6.0-202101160934.p0.git.94242.fc5242e.el7 |
| Kubernetes Kubernetes | >=1.17.0<1.17.13 | |
| Kubernetes Kubernetes | >=1.18.0<1.18.10 | |
| Kubernetes Kubernetes | >=1.19.0<1.19.3 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2020-8564
- https://github.com/kubernetes/kubernetes/issues/95622
- https://github.com/kubernetes/kubernetes/pull/94712
- https://github.com/kubernetes/kubernetes/commit/11793434dac97a49bfed0150b56ac63e5dc34634
- https://groups.google.com/g/kubernetes-security-discuss/c/vm-HcrFUOCs/m/36utxAM5CwAJ
- https://pkg.go.dev/vuln/GO-2021-0066
- https://security.netapp.com/advisory/ntap-20210122-0006/
- https://github.com/advisories/GHSA-8mjg-8c8g-6h85 (Advisory)
- https://www.cve.org/CVERecord?id=CVE-2020-8564 https://nvd.nist.gov/vuln/detail/CVE-2020-8564 https://github.com/kubernetes/kubernetes/issues/95622 https://groups.google.com/g/kubernetes-announce/c/ScdmyORnPDk
- https://bugzilla.redhat.com/show_bug.cgi?id=1886637
- https://access.redhat.com/errata/RHSA-2021:3193
- https://access.redhat.com/errata/RHSA-2021:0281
- https://access.redhat.com/errata/RHSA-2020:5359
- https://access.redhat.com/errata/RHSA-2020:4297
- https://access.redhat.com/errata/RHSA-2021:0172
- https://access.redhat.com/errata/RHSA-2020:5259
- https://access.redhat.com/errata/RHSA-2021:0171
- https://access.redhat.com/security/cve/cve-2020-8564
- https://groups.google.com/g/kubernetes-announce/c/ScdmyORnPDk
- https://security.netapp.com/advisory/ntap-20210122-0006
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2020-8564?
CVE-2020-8564 is a vulnerability in Kubernetes that allows the contents of a malformed Docker config file to be leaked, potentially exposing pull secrets or other registry credentials.
How severe is CVE-2020-8564?
CVE-2020-8564 has a severity score of 5.3, which is considered medium.
How can I fix CVE-2020-8564?
To fix CVE-2020-8564, update your Kubernetes to version 1.20.0-alpha.1, 1.17.13, 1.18.10, 1.19.3, or later.
Where can I find more information about CVE-2020-8564?
You can find more information about CVE-2020-8564 on the CVE website, the NVD website, and in the Kubernetes GitHub repository.
What is the Common Weakness Enumeration (CWE) for CVE-2020-8564?
The CWE for CVE-2020-8564 is CWE-117 (Improper Output Neutralization for Logs) and CWE-532 (Information Exposure Through Log Files).
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