GHSA-qh36-44jv-c8xj

Source

https://github.com/advisories/GHSA-qh36-44jv-c8xj

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/02/GHSA-qh36-44jv-c8xj/GHSA-qh36-44jv-c8xj.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-qh36-44jv-c8xj

Aliases

CVE-2020-8562

Related

Published

2022-02-02T00:01:58Z

Modified

2024-08-21T16:56:43.610898Z

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

Potential proxy IP restriction bypass in Kubernetes

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. All versions of Kubernetes are impacted, and there is no fix in place.

Database specific

{
    "nvd_published_at": "2022-02-01T11:15:00Z",
    "cwe_ids": [
        "CWE-367"
    ],
    "severity": "LOW",
    "github_reviewed": true,
    "github_reviewed_at": "2022-02-03T17:52:40Z"
}

References