CVE-2020-8562

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Source
https://cve.org/CVERecord?id=CVE-2020-8562
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-8562.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2020-8562
Aliases
Downstream
AZL (1)
CGA (2)
DEBIAN (1)
MINI (52)
openSUSE (1)
UBUNTU (1)
Related
Published
2022-02-01T11:15:10Z
Modified
2026-10-24T10:34:28Z
Severity
  • 3.1 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
[none]
Details

As mitigations to a report from 2019 and CVE-2020-8555, Kubernetes attempts to prevent proxied connections from accessing link-local or localhost networks when making user-driven connections to Services, Pods, Nodes, or StorageClass service providers. As part of this mitigation Kubernetes does a DNS name resolution check and validates that response IPs are not in the link-local (169.254.0.0/16) or localhost (127.0.0.0/8) range. Kubernetes then performs a second DNS resolution without validation for the actual connection. If a non-standard DNS server returns different non-cached responses, a user may be able to bypass the proxy IP restriction and access private networks on the control plane.

Database specific 
{
    "unresolved_ranges":  [
        {
            "cpes":  [
                "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*"
            ],
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "last_affected":  "1.18.18"
                        },
                        {
                            "introduced":  "1.19.0"
                        },
                        {
                            "last_affected":  "1.19.10"
                        },
                        {
                            "introduced":  "1.20.0"
                        },
                        {
                            "last_affected":  "1.20.6"
                        }
                    ],
                    "source":  "CPE_RANGE"
                }
            ],
            "vendor_product":  "kubernetes:kubernetes"
        },
        {
            "cpes":  [
                "cpe:2.3:a:kubernetes:kubernetes:1.21.0:*:*:*:*:*:*:*"
            ],
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "introduced":  "1.21.0"
                        },
                        {
                            "last_affected":  "1.21.0"
                        }
                    ],
                    "source":  "CPE_STRING"
                }
            ],
            "vendor_product":  "kubernetes:kubernetes"
        }
    ]
}
References

Affected packages

Git / github.com/kubernetes/kubelet

Affected ranges

Type
GIT
Repo
https://github.com/kubernetes/kubelet
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
91407aecd4edbe8888bb4648ee46e8dae792a20d
Introduced
1af8853567a0faecc59fbc4d7d2ddc9359ddde83
Last Affected
ea1348bf4a58d089e74ac7def7f855945a2c0bbb
Introduced
30b4cd52c54df86ed93459ba84b3e61877fc28ea
Last Affected
723e5d932a5277a14f5c636330ac445539bf5708
Introduced
2f96697a6b8649844ec80a9bbe6d7cde3b197f5b
Last Affected
2f96697a6b8649844ec80a9bbe6d7cde3b197f5b
Database specific
Show details 
{
    "extracted_events":  [
        {
            "cpe":  "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "last_affected":  "1.18.18"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "cpe":  "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "1.19.0"
                },
                {
                    "last_affected":  "1.19.10"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "cpe":  "cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "1.20.0"
                },
                {
                    "last_affected":  "1.20.6"
                }
            ],
            "source":  "CPE_RANGE"
        },
        {
            "cpe":  "cpe:2.3:a:kubernetes:kubernetes:1.21.0:*:*:*:*:*:*:*",
            "range":  [
                {
                    "introduced":  "1.21.0"
                },
                {
                    "last_affected":  "1.21.0"
                }
            ],
            "source":  "CPE_STRING"
        }
    ]
}

Affected versions

1.*
1.21.0
kubernetes-1.*
kubernetes-1.10.0-alpha.0
kubernetes-1.10.0-alpha.1
kubernetes-1.10.0-alpha.2
kubernetes-1.10.0-alpha.3
kubernetes-1.11.0-alpha.0
kubernetes-1.11.0-alpha.1
kubernetes-1.11.0-alpha.2
kubernetes-1.12.0-alpha.0
kubernetes-1.12.0-alpha.1
kubernetes-1.12.0-beta.0
kubernetes-1.13.0-alpha.0
kubernetes-1.18.18
kubernetes-1.19.10
kubernetes-1.20.6
kubernetes-1.21.0
kubernetes-1.9.0-alpha.0
kubernetes-1.9.0-alpha.1
kubernetes-1.9.0-alpha.2
kubernetes-1.9.0-alpha.3
v0.*
v0.18.18
v0.19.10
v0.20.6
v0.21.0

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2020-8562.json"