Kubernetes API server follows unvalidated redirects from streaming Kubelet endpoints
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-601.
Summary
Improper validation of URL redirection in the Kubernetes API server in versions prior to v1.14.0 allows an attacker-controlled Kubelet to redirect API server requests from streaming endpoints to arbitrary hosts. Impacted API servers will follow the redirect as a GET request with client-certificate credentials for authenticating to the Kubelet.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Kubernetes | Kubernetes | v1.14 to before v1.14.0 | v1.14.0 | Patch available | CNA |
- Kubernetes VendorKubernetes Affected v1.14 to before v1.14.0 Fixed in v1.14.0 Patch available CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* | 1.10.0 – 1.13.13 | Vulnerable | Kubernetes |
| cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha0:*:*:*:*:*:* | 1.14.0 alpha0 | Vulnerable | Kubernetes |
| cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha1:*:*:*:*:*:* | 1.14.0 alpha1 | Vulnerable | Kubernetes |
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 31 | Vulnerable | Fedoraproject |
- cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* Versions 1.10.0 – 1.13.13 Vulnerable ·Kubernetes
- cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha0:*:*:*:*:*:* Versions 1.14.0 alpha0 Vulnerable ·Kubernetes
- cpe:2.3:a:kubernetes:kubernetes:1.14.0:alpha1:*:*:*:*:*:* Versions 1.14.0 alpha1 Vulnerable ·Kubernetes
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
Remediation
- Fix · CNA Kubernetes (Kubernetes) Fixed in v1.14.0
Red Hat 1 advisory
- RHSA-2020:5363 Released 2020-12-16 · Red Hat rating ModerateOpenShift Container Platform 3.11.346 security and bug fix update
- Red Hat OpenShift Container Platform 3.11 atomic-openshift-3.11.346-1.git.0.ea10721.el7, atomic-openshift-clients-3.11.346-1.git.0.ea10721.el7, atomic-openshift-clients-redistributable-3.11.346-1.git.0.ea10721.el7 +10
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat OpenShift Container Platform 3.11 | Fixed | RHSA-2020:5363 |
Not affected: 3 products
- Red Hat OpenShift Container Platform 3.11
- Red Hat OpenShift Container Platform 4
- Red Hat Storage 3
Timeline
- 2026-10-02 Threatist record created from CVE-2018-1002102
References
More Kubernetes vulnerabilities
- TI-2018-16130 Improper privilege management in Kubernetes CVSS 3.0CRITICAL 9.8
- TI-2019-08418 Kubernetes kubelet exposes /debug/pprof info on healthz port CVSS 3.1HIGH 8.2
- TI-2023-05086 Kubernetes - Windows nodes - Insufficient input sanitization in in-tree storage plugin leads to privilege escalation CVSS 3.1HIGH 8.8
- TI-2023-03433 Kubernetes - Windows nodes - Insufficient input sanitization leads to privilege escalation CVSS 3.1HIGH 8.8
- TI-2023-02285 Bypass of seccomp profile enforcement CVSS 3.1MEDIUM 5.5
- TI-2017-14755 Link following in Kubernetes CVSS 3.0CRITICAL 9.6
Sources
- CVE-2018-1002102 · CVE Program
- CVE-2018-1002102 · NVD
- FIRST EPSS
- CVE-2018-1002102 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences