UBUNTU-CVE-2020-8562
- Source
- https://ubuntu.com/security/CVE-2020-8562
- Import Source
- https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-8562.json
- JSON Data
- https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-8562
- Related
- Published
- 2022-02-01T11:15:00Z
- Modified
- 2025-01-13T10:22:10Z
- 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
Ubuntu:20.04:LTS / kubernetes
Package
- Name
- kubernetes
- Purl
- pkg:deb/ubuntu/kubernetes@1.0?arch=source&distro=focal
Ubuntu:22.04:LTS / kubernetes
Package
- Name
- kubernetes
- Purl
- pkg:deb/ubuntu/kubernetes@1.0?arch=source&distro=jammy
Ubuntu:24.10 / kubernetes
Package
- Name
- kubernetes
- Purl
- pkg:deb/ubuntu/kubernetes@1.0?arch=source&distro=oracular