CVE-2020-8029

Kubelet key disclosure via permissive file creation

Published Feb 11, 2021 · Updated Sep 16, 2024

Incorrect key-file permissions in skuba for SUSE CaaS Platform 4.5 allow local users to read the kubelet private key during node setup. The upload path creates /var/lib/kubelet/pki/kubelet.key with mode 0644 before changing it to 0400, briefly exposing its contents to other accounts. Exploitation requires local access during node bootstrap or join; the bounded consequence is disclosure of the kubelet authentication key.

CVSS severity4.0
Medium
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect key-file permissions in skuba for SUSE CaaS Platform 4.5 allow local users to read the kubelet private key during node setup. The upload path creates /var/lib/kubelet/pki/kubelet.key with mode 0644 before changing it to 0400, briefly exposing its contents to other accounts. Exploitation requires local access during node bootstrap or join; the bounded consequence is disclosure of the kubelet authentication key.

The record

CVE
CVE-2020-8029
Published
Feb 11, 2021
Updated
Sep 16, 2024
Vendor
SUSE
Product
SUSE CaaS Platform
Classifications
CWE-732, T1552.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 11, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=skuba <https://github.com/SUSE/skuba/pull/1416

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

SUSE · SUSE CaaS Platformversion=skuba <https://github.com/SUSE/skuba/pull/1416

Published CVSS scores

2.1NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
4.0NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0SUSECVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-732Incorrect Permission Assignment for Critical Resource
T1552.004Unsecured Credentials: Private Keys

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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