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CVE-2018-1002105 — Privilege Escalation in...

CRITICAL

Privilege Escalation in Kubernetes

Published February 15, 2022Updated September 10, 2026Source: osv

Summary

In all Kubernetes versions prior to v1.10.11, v1.11.5, and v1.12.3, incorrect handling of error responses to proxied upgrade requests in the kube-apiserver allowed specially crafted requests to establish a connection through the Kubernetes API server to backend servers, then send arbitrary requests over the same connection directly to the backend, authenticated with the Kubernetes API server's TLS credentials used to establish the backend connection.

Advisory Timeline

  • First published February 15, 2022 (1700 days ago).
  • Last revised September 10, 2026 — 1668 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Go
Update github.com/kubernetes/kubernetes to 1.10.11 or later
go get github.com/kubernetes/kubernetes@v1.10.11
Go
Update github.com/kubernetes/kubernetes to 1.11.5 or later
go get github.com/kubernetes/kubernetes@v1.11.5
Go
Update github.com/kubernetes/kubernetes to 1.12.3 or later
go get github.com/kubernetes/kubernetes@v1.12.3

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (3)

Affects 1 ecosystem: go (1).

PackageEcosystemAffectedFixed In
github.com/kubernetes/kubernetes
go
All versions1.10.11
github.com/kubernetes/kubernetes
go
All versions1.11.5
github.com/kubernetes/kubernetes
go
All versions1.12.3

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

  • CWE-269
    Improper Privilege ManagementMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Frequently Asked Questions

What is CVE-2018-1002105?
Privilege Escalation in Kubernetes This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2018-1002105?
CVE-2018-1002105 affects github.com/kubernetes/kubernetes. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2018-1002105 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-579h-mv94-g4gp
GO-2022-0792

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