3.5
CVE-2020-8562
- EPSS 0.06%
- Published 01.02.2022 11:15:10
- Last modified 21.11.2024 05:39:02
- Source jordan@liggitt.net
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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.
Data is provided by the National Vulnerability Database (NVD)
Kubernetes ≫ Kubernetes Version <= 1.18.18
Kubernetes ≫ Kubernetes Version >= 1.19.0 <= 1.19.10
Kubernetes ≫ Kubernetes Version >= 1.20.0 <= 1.20.6
Kubernetes ≫ Kubernetes Version1.21.0
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
| Type | Source | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.06% | 0.182 |
| Source | Base Score | Exploit Score | Impact Score | Vector string |
|---|---|---|---|---|
| nvd@nist.gov | 3.1 | 1.6 | 1.4 |
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
|
| nvd@nist.gov | 3.5 | 6.8 | 2.9 |
AV:N/AC:M/Au:S/C:P/I:N/A:N
|
| jordan@liggitt.net | 2.2 | 0.7 | 1.4 |
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:N/A:N
|
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.