CVE-2024-9486

Summary

A security issue was discovered in the Kubernetes Image Builder versions <= v0.1.37 where default credentials are enabled during the image build process. Virtual machine images built using the Proxmox provider do not disable these default credentials, and nodes using the resulting images may be accessible via these default credentials. The credentials can be used to gain root access. Kubernetes clusters are only affected if their nodes use VM images created via the Image Builder project with its Proxmox provider.

Affected Software

Weaknesses

• CWE-798: CWE-798 Use of Hard-coded Credentials

Workarounds

Prior to upgrading, this vulnerability can be mitigated by disabling the builder account on affected VMs: usermod -L builder

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: total

References

• https://github.com/kubernetes/kubernetes/issues/128006
• https://github.com/kubernetes-sigs/image-builder/pull/1595
• https://groups.google.com/g/kubernetes-security-announce/c/UKJG-oZogfA/m/Lu1hcnHmAQAJ

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