CVE-2020-8562

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Source
https://nvd.nist.gov/vuln/detail/CVE-2020-8562
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8562.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-8562
Aliases
Related
Published
2022-02-01T11:15:10Z
Modified
2025-02-19T03:16:38.892843Z
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.

References

Affected packages

Debian:11 / kubernetes

Package

Name
kubernetes
Purl
pkg:deb/debian/kubernetes?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.20.5+really1.20.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / kubernetes

Package

Name
kubernetes
Purl
pkg:deb/debian/kubernetes?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.20.5+really1.20.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Git / github.com/kubernetes/kubelet

Affected ranges

Type
GIT
Repo
https://github.com/kubernetes/kubelet
Events
Last affected
2f96697a6b8649844ec80a9bbe6d7cde3b197f5b
Introduced
30b4cd52c54df86ed93459ba84b3e61877fc28ea
Last affected
723e5d932a5277a14f5c636330ac445539bf5708
Last affected
91407aecd4edbe8888bb4648ee46e8dae792a20d
Introduced
1af8853567a0faecc59fbc4d7d2ddc9359ddde83
Last affected
ea1348bf4a58d089e74ac7def7f855945a2c0bbb
Type
GIT
Repo
https://github.com/kubernetes/kubernetes
Events
Last affected
6f6ce59dc8fefde25a3ba0ef0047f4ec6662ef24
Introduced
af46c47ce925f4c4ad5cc8d1fca46c7b77d13b38
Last affected
8a62859e515889f07e3e3be6a1080413f17cf2c3
Introduced
e19964183377d0ec2052d1f1fa930c4d7575bd50
Last affected
98d5dc5d36d34a7ee13368a7893dcb400ec4e566
Last affected
cb303e613a121a29364f75cc67d3d580833a7479

Affected versions

v1.*

v1.19.0
v1.19.1
v1.19.1-rc.0
v1.19.10
v1.19.10-rc.0
v1.19.2
v1.19.2-rc.0
v1.19.3
v1.19.3-rc.0
v1.19.4
v1.19.4-rc.0
v1.19.5
v1.19.5-rc.0
v1.19.6
v1.19.6-rc.0
v1.19.6-rc.1
v1.19.7
v1.19.7-rc.0
v1.19.8
v1.19.8-rc.0
v1.19.9
v1.19.9-rc.0
v1.20.0
v1.20.1
v1.20.1-rc.0
v1.20.1-rc.1
v1.20.2
v1.20.2-rc.0
v1.20.3
v1.20.3-rc.0
v1.20.4
v1.20.4-rc.0
v1.20.5
v1.20.5-rc.0
v1.20.6
v1.20.6-rc.0