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Vulnerability Details : CVE-2020-8562

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.
Publish Date : 2022-02-01 Last Update Date : 2022-03-29
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- CVSS Scores & Vulnerability Types

CVSS Score
3.5
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication ???
Gained Access None
Vulnerability Type(s) Bypass a restriction or similar
CWE ID 367

- Products Affected By CVE-2020-8562

# Product Type Vendor Product Version Update Edition Language
1 Application Kubernetes Kubernetes * * * * Version Details Vulnerabilities
2 Application Kubernetes Kubernetes 1.21.0 * * * Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Kubernetes Kubernetes 2

- References For CVE-2020-8562

https://security.netapp.com/advisory/ntap-20220225-0002/ CONFIRM
https://github.com/kubernetes/kubernetes/issues/101493
https://groups.google.com/g/kubernetes-security-announce/c/-MFX60_wdOY

- Metasploit Modules Related To CVE-2020-8562

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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