CVE-2020-8563: Github.com/kubernetes/kubernetes Sensitive Information Leak Vulnerability

MODERATE
Advisory Identifier: GHSA-5xfg-wv98-264m
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CVSS 6.3
CWE-532
Published
Advisory Summary

CVE-2020-8563 is a MODERATE (CVSS 6.3) sensitive information leak vulnerability (CWE-532: Insertion of Sensitive Information into Log File) affecting Github.com/kubernetes/kubernetes libraries in the Go ecosystem. The issue involves sensitive information leak via log file in kubernetes. Remediation is available by upgrading affected packages to version 1.19.3.

CVE-2020-8563 at a Glance

CVE Identifier CVE-2020-8563
GHSA Identifier GHSA-5xfg-wv98-264m
Severity MODERATE
CVSS v3.1 Base Score 6.3
CWE Classification CWE-532: Insertion of Sensitive Information into Log File
Affected Product Github.com/kubernetes/kubernetes
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2020-8563

To remediate this vulnerability, upgrade all affected Github.com/kubernetes/kubernetes dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/kubernetes/kubernetes fixed: 1.19.3 
Upgrade github.com/kubernetes/kubernetes to 1.19.3
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/kubernetes/kubernetes

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-8563, inspect your project dependencies for Github.com/kubernetes/kubernetes:

inspect dependencies for github.com/kubernetes/kubernetes

Analyze the terminal output to locate any version of Github.com/kubernetes/kubernetes in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.19.3), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-532: Insertion of Sensitive Information into Log File, where the product writes sensitive information to a log file. In Github.com/kubernetes/kubernetes, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2020-8563 Affected Github.com/kubernetes/kubernetes Versions

1 component(s)
Fixed Versions:
1.19.3
Product / Package Ecosystem Affected Versions Fixed Version
github.com/kubernetes/kubernetes
golang/github.com/kubernetes/kubernetes
Go
< 1.19.3
1.19.3

References

NVD — CVE-2020-8563 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-8563
Github.com/kubernetes/kubernetes Source Repository REPOSITORY
https://github.com/kubernetes/kubernetes/issues/95621
Github.com/kubernetes/kubernetes Source Repository REPOSITORY
https://github.com/kubernetes/kubernetes/pull/95236
Github.com/kubernetes/kubernetes Source Repository REPOSITORY
https://github.com/kubernetes/kubernetes/pull/95236/commits/247f6dd09299bc7893c1e0affea11c0255025b96
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=1886635
Github.com/kubernetes/kubernetes Source Repository REPOSITORY
https://github.com/kubernetes/kubernetes
groups.google.com/g/kubernetes-announ... WEB
https://groups.google.com/g/kubernetes-announce/c/ScdmyORnPDk
Github.com/kubernetes/kubernetes Security Information SECURITY
https://groups.google.com/g/kubernetes-security-discuss/c/vm-HcrFUOCs/m/36utxAM5CwAJ
Github.com/kubernetes/kubernetes Security Information SECURITY
https://security.netapp.com/advisory/ntap-20210122-0006

Frequently Asked Questions

What is CVE-2020-8563?
CVE-2020-8563 is a security vulnerability in Github.com/kubernetes/kubernetes involving Sensitive Information leak via Log File in Kubernetes under CWE-532: Insertion of Sensitive Information into Log File.
Which Github.com/kubernetes/kubernetes versions are affected?
Affected versions include releases prior to 1.19.3 across affected packages: github.com/kubernetes/kubernetes.
What version fixes CVE-2020-8563?
Upgrading to 1.19.3 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/kubernetes/kubernetes affected?
Yes, github.com/kubernetes/kubernetes is affected in releases prior to 1.19.3. Upgrade your dependency to 1.19.3 or later.
What is the CVSS score of CVE-2020-8563?
CVE-2020-8563 has a CVSS v3.1 base score of 6.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N.
What CWE is associated with CVE-2020-8563?
CVE-2020-8563 is classified under CWE-532: Insertion of Sensitive Information into Log File (The product writes sensitive information to a log file.).
How can I check Go dependencies for CVE-2020-8563?
Run the dependency tree command: 'inspect dependencies for github.com/kubernetes/kubernetes'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5xfg-wv98-264m",
  "modified" : "2024-04-24T20:02:21Z",
  "published" : "2024-04-24T20:02:20Z",
  "aliases" : [ "CVE-2020-8563" ],
  "summary" : "Sensitive Information leak via Log File in Kubernetes",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/kubernetes/kubernetes"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.19.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-8563"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kubernetes/kubernetes/issues/95621"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kubernetes/kubernetes/pull/95236"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kubernetes/kubernetes/pull/95236/commits/247f6dd09299bc7893c1e0affea11c0255025b96"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=1886635"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kubernetes/kubernetes"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/g/kubernetes-announce/c/ScdmyORnPDk"
  }, {
    "type" : "WEB",
    "url" : "https://groups.google.com/g/kubernetes-security-discuss/c/vm-HcrFUOCs/m/36utxAM5CwAJ"
  }, {
    "type" : "WEB",
    "url" : "https://security.netapp.com/advisory/ntap-20210122-0006"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-532" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-24T20:02:20Z",
    "nvd_published_at" : null
  }
}