Kubernetes kube-apiserver allows access to custom resources via wrong scope
Noroxi assessment
Priority: Monitor (action score 33/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 2.1% (FIRST EPSS); higher than 81.8% of all records.
- Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: kubernetes (Debian:12) 1.17.4-1; k8s.io/apiextensions-apiserver (Go) 0.14.5, 0.15.2, 0.13.9; atomic-openshift (Red Hat:openshift:3.10::el7) 0:3.10.170-1.git.0.8e592d6.el7.
- Severity is disputed: the assigning authority (CNA) scores it 5.0, NVD 8.1.
Low priority for now. Upgrade to kubernetes (Debian:12) 1.17.4-1; k8s.io/apiextensions-apiserver (Go) 0.14.5, 0.15.2, 0.13.9; atomic-openshift (Red Hat:openshift:3.10::el7) 0:3.10.170-1.git.0.8e592d6.el7 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
The Kubernetes kube-apiserver mistakenly allows access to a cluster-scoped custom resource if the request is made as if the resource were namespaced. Authorizations for the resource accessed in this manner are enforced using roles and role bindings within the namespace, meaning that a user with access only to a resource in one namespace could create, view update or delete the cluster-scoped resource (according to their namespace role privileges). Kubernetes affected versions include versions prior to 1.13.9, versions prior to 1.14.5, versions prior to 1.15.2, and versions 1.7, 1.8, 1.9, 1.10, 1.11, 1.12.
- Published
- Aug 28, 2019
- Updated
- Jun 16, 2026
- EPSS
- 2.1% · 81th percentile
- CWE
- CWE-20
Report tools
Action score
33
Monitor
Low priority for now.
- CVSS
- 32 / 40 · 8.1 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.1%
CNA vs NVD score
- NVD
- 8.1
- CNA · kubernetes
- 5.0
- 3.1 point gap
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| kubernetes | kubernetes | cpe:2.3:a:kubernetes:kubernetes |
| redhat | openshift container platform | cpe:2.3:a:redhat:openshift_container_platform |
Using kubernetes? Add it to your stack and be the first to know about CVEs like this one. (Kubernetes)
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- kubernetes kubernetes1.7.0 and later · up to 1.12.10 inclusive
- kubernetes kubernetes1.13.0 and later · before 1.13.9
- kubernetes kubernetes1.14.0 and later · before 1.14.5
- kubernetes kubernetes1.15.0 and later · before 1.15.2
- kubernetes kubernetes1.12.11
Versions reported by the vendor
Affected version ranges reported by the assigning authority (kubernetes). Independent of NVD's CPE analysis and usually ahead of it.
Kubernetes Kubernetes
- 1.7, prior to 1.15.2, prior to 1.13.9, prior to 1.14.5, 1.8, 1.9, 1.10, 1.11, 1.12affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | kubernetes | before 1.17.4-1 | 1.17.4-1 |
| Go | k8s.io/apiextensions-apiserver | from 0.14.0 · before 0.14.5 | 0.14.5 |
| Go | k8s.io/apiextensions-apiserver | from 0.15.0 · before 0.15.2 | 0.15.2 |
| Go | k8s.io/apiextensions-apiserver | from 0.7.0 · before 0.13.9 | 0.13.9 |
| Red Hat:openshift:3.10::el7 | atomic-openshift | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-clients | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-clients-redistributable | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-docker-excluder | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-excluder | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-hyperkube | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-hypershift | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-master | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-node | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-pod | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-sdn-ovs | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-template-service-broker | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.10::el7 | atomic-openshift-tests | before 0:3.10.170-1.git.0.8e592d6.el7 | 0:3.10.170-1.git.0.8e592d6.el7 |
| Red Hat:openshift:3.11::el7 | ansible-service-broker | before 1:1.3.23-2.el7 | 1:1.3.23-2.el7 |
| Red Hat:openshift:3.11::el7 | ansible-service-broker-container-scripts | before 1:1.3.23-2.el7 | 1:1.3.23-2.el7 |
| Red Hat:openshift:3.11::el7 | ansible-service-broker-selinux | before 1:1.3.23-2.el7 | 1:1.3.23-2.el7 |
| Red Hat:openshift:3.11::el7 | automation-broker-apb-role | before 1:1.3.23-2.el7 | 1:1.3.23-2.el7 |
| Red Hat:openshift:3.9::el7 | ansible-service-broker | before 0:1.1.20-2.el7 | 0:1.1.20-2.el7 |
| Red Hat:openshift:3.9::el7 | ansible-service-broker-container-scripts | before 0:1.1.20-2.el7 | 0:1.1.20-2.el7 |
| Red Hat:openshift:3.9::el7 | ansible-service-broker-selinux | before 0:1.1.20-2.el7 | 0:1.1.20-2.el7 |
+58
Same product
kubernetes: all recordsOther highest-scoring records for the same primary product.
- CVE-2018-1002105In 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 the65This week
- CVE-2019-11248Kubernetes kubelet exposes /debug/pprof info on healthz port55Plan
- CVE-2017-1002101In Kubernetes versions 1.3.x, 1.4.x, 1.5.x, 1.6.x and prior to versions 1.7.14, 1.8.9 and 1.9.4 containers using subpath volume mounts with 42Plan
Published before and after this one in the same product
- ← EarlierCVE-2019-11245Aug 28, 2019 · kubelet-started container uid changes to root after first restart or if image is already pulled to the node31Monitor
- ← EarlierCVE-2019-11246Aug 28, 2019 · kubectl cp allows symlink directory traversal27Monitor
- Later →CVE-2019-11249Aug 28, 2019 · kubectl cp allows symlink directory traversal27Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:kubernetes | 1.17.4-1 · Debian:12 | Package registry (OSV) |
| Go:k8s.io/apiextensions-apiserver | 0.13.9 | Package registry (OSV) |
| Go:k8s.io/apiextensions-apiserver | 0.14.5 | Package registry (OSV) |
| Go:k8s.io/apiextensions-apiserver | 0.15.2 | Package registry (OSV) |
| red hat:ansible-service-broker | 1:1.3.23-2.el7 · Red Hat:openshift:3.11::el7 | Package registry (OSV) |
| red hat:ansible-service-broker-container-scripts | 1:1.3.23-2.el7 · Red Hat:openshift:3.11::el7 | Package registry (OSV) |
| red hat:ansible-service-broker-selinux | 1:1.3.23-2.el7 · Red Hat:openshift:3.11::el7 | Package registry (OSV) |
| red hat:atomic-openshift | 0:3.10.170-1.git.0.8e592d6.el7 · Red Hat:openshift:3.10::el7 | Package registry (OSV) |
| red hat:atomic-openshift-clients | 0:3.10.170-1.git.0.8e592d6.el7 · Red Hat:openshift:3.10::el7 | Package registry (OSV) |
| red hat:atomic-openshift-clients-redistributable | 0:3.10.170-1.git.0.8e592d6.el7 · Red Hat:openshift:3.10::el7 | Package registry (OSV) |
| red hat:atomic-openshift-docker-excluder | 0:3.10.170-1.git.0.8e592d6.el7 · Red Hat:openshift:3.10::el7 | Package registry (OSV) |
| red hat:automation-broker-apb-role | 1:1.3.23-2.el7 · Red Hat:openshift:3.11::el7 | Package registry (OSV) |
| red hat:openshift | 0:4.1.10-201908060758.git.0.d81afa6.el7 · Red Hat:openshift:4.1::el7 | Package registry (OSV) |
| red hat:openshift-clients | 0:4.1.10-201908060758.git.0.d81afa6.el7 · Red Hat:openshift:4.1::el7 | Package registry (OSV) |
| red hat:openshift-clients-redistributable | 0:4.1.10-201908060758.git.0.d81afa6.el7 · Red Hat:openshift:4.1::el7 | Package registry (OSV) |
| red hat:openshift-hyperkube | 0:4.1.10-201908060758.git.0.d81afa6.el7 · Red Hat:openshift:4.1::el7 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- None
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (6 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.