Kubernetes CSI volume snapshot, cloning and resizing features can result in unauthorized volume data access or mutation
Noroxi assessment
Priority: Monitor (action score 27/100)
- 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% (FIRST EPSS); higher than 80.3% of all records.
- Anyone who can reach it over the internet can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: github.com/kubernetes-csi/external-provisioner (Go) 1.0.2, 1.2.2, 1.3.1; github.com/kubernetes-csi/external-snapshotter/v6 (Go) 1.0.2, 1.2.2; openshift-external-storage (Red Hat:openshift:3.11::el7) 0:0.0.2-10.gitd3c94f0.el7.
Low priority for now. Upgrade to github.com/kubernetes-csi/external-provisioner (Go) 1.0.2, 1.2.2, 1.3.1; github.com/kubernetes-csi/external-snapshotter/v6 (Go) 1.0.2, 1.2.2; openshift-external-storage (Red Hat:openshift:3.11::el7) 0:0.0.2-10.gitd3c94f0.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
Improper input validation in Kubernetes CSI sidecar containers for external-provisioner (<v0.4.3, <v1.0.2, v1.1, <v1.2.2, <v1.3.1), external-snapshotter (<v0.4.2, <v1.0.2, v1.1, <1.2.2), and external-resizer (v0.1, v0.2) could result in unauthorized PersistentVolume data access or volume mutation during snapshot, restore from snapshot, cloning and resizing operations.
- Published
- Dec 5, 2019
- Updated
- Jun 16, 2026
- EPSS
- 2.0% · 80th percentile
- CWE
- CWE-20
Report tools
Action score
27
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 2.0%
CNA vs NVD score
- NVD
- 6.5
- CNA · kubernetes
- 4.8
- 1.7 point gap
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N
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 | external-provisioner | cpe:2.3:a:kubernetes:external-provisioner |
| kubernetes | external-resizer | cpe:2.3:a:kubernetes:external-resizer |
| kubernetes | external-snapshotter | cpe:2.3:a:kubernetes:external-snapshotter |
| redhat | openshift container platform | cpe:2.3:a:redhat:openshift_container_platform |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- kubernetes external-provisioner0.4.1 and later · up to 0.4.2 inclusive
- kubernetes external-provisioner1.0.0 and later · up to 1.0.1 inclusive
- kubernetes external-provisioner1.1.0 and later · up to 1.2.1 inclusive
- kubernetes external-provisioner1.3.0
- kubernetes external-resizer0.1.0 and later · up to 0.2.0 inclusive
- kubernetes external-snapshotter0.4.0 and later · up to 0.4.1 inclusive
- kubernetes external-snapshotter1.0.0 and later · up to 1.0.1 inclusive
- kubernetes external-snapshotter1.1.0 and later · up to 1.2.1 inclusive
- redhat openshift container platform3.11
- redhat openshift container platform4.1
- redhat openshift container platform4.2
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-csi external-provisioner
- prior to 1.0.2, 1.1, prior to 1.2.2, prior to 1.3.1affected
- v1.14 and later · before prior to 0.4.3affected
Kubernetes kubernetes-csi external-resizer
- 0.1, 0.2affected
Kubernetes kubernetes-csi external-snapshotter
- prior to 0.4.2, prior to 1.0.2, 1.1, prior to 1.2.2affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Go | github.com/kubernetes-csi/external-provisioner | from 1.0.0 · before 1.0.2 | 1.0.2 |
| Go | github.com/kubernetes-csi/external-provisioner | from 1.2.0 · before 1.2.2 | 1.2.2 |
| Go | github.com/kubernetes-csi/external-provisioner | from 1.3.0 · before 1.3.1 | 1.3.1 |
| Go | github.com/kubernetes-csi/external-provisioner | before 0.4.3 | 0.4.3 |
| Go | github.com/kubernetes-csi/external-provisioner | all versions | — |
| Go | github.com/kubernetes-csi/external-resizer | all versions | — |
| Go | github.com/kubernetes-csi/external-snapshotter/v6 | from 1.0.0 · before 1.0.2 | 1.0.2 |
| Go | github.com/kubernetes-csi/external-snapshotter/v6 | from 1.2.0 · before 1.2.2 | 1.2.2 |
| Go | github.com/kubernetes-csi/external-snapshotter/v6 | all versions | — |
| Red Hat:openshift:3.11::el7 | openshift-external-storage | before 0:0.0.2-10.gitd3c94f0.el7 | 0:0.0.2-10.gitd3c94f0.el7 |
| Red Hat:openshift:3.11::el7 | openshift-external-storage-cephfs-provisioner | before 0:0.0.2-10.gitd3c94f0.el7 | 0:0.0.2-10.gitd3c94f0.el7 |
| Red Hat:openshift:3.11::el7 | openshift-external-storage-debuginfo | before 0:0.0.2-10.gitd3c94f0.el7 | 0:0.0.2-10.gitd3c94f0.el7 |
| Red Hat:openshift:3.11::el7 | openshift-external-storage-efs-provisioner | before 0:0.0.2-10.gitd3c94f0.el7 | 0:0.0.2-10.gitd3c94f0.el7 |
| Red Hat:openshift:3.11::el7 | openshift-external-storage-local-provisioner | before 0:0.0.2-10.gitd3c94f0.el7 | 0:0.0.2-10.gitd3c94f0.el7 |
| Red Hat:openshift:3.11::el7 | openshift-external-storage-manila-provisioner | before 0:0.0.2-10.gitd3c94f0.el7 | 0:0.0.2-10.gitd3c94f0.el7 |
| Red Hat:openshift:3.11::el7 | openshift-external-storage-snapshot-controller | before 0:0.0.2-10.gitd3c94f0.el7 | 0:0.0.2-10.gitd3c94f0.el7 |
| Red Hat:openshift:3.11::el7 | openshift-external-storage-snapshot-provisioner | before 0:0.0.2-10.gitd3c94f0.el7 | 0:0.0.2-10.gitd3c94f0.el7 |
| Red Hat:openshift:4.2::el7 | openshift-external-storage | before 0:0.0.2-11.gitd3c94f0.el7 | 0:0.0.2-11.gitd3c94f0.el7 |
| Red Hat:openshift:4.2::el7 | openshift-external-storage-cephfs-provisioner | before 0:0.0.2-11.gitd3c94f0.el7 | 0:0.0.2-11.gitd3c94f0.el7 |
| Red Hat:openshift:4.2::el7 | openshift-external-storage-debuginfo | before 0:0.0.2-11.gitd3c94f0.el7 | 0:0.0.2-11.gitd3c94f0.el7 |
| Red Hat:openshift:4.2::el7 | openshift-external-storage-efs-provisioner | before 0:0.0.2-11.gitd3c94f0.el7 | 0:0.0.2-11.gitd3c94f0.el7 |
| Red Hat:openshift:4.2::el7 | openshift-external-storage-local-provisioner | before 0:0.0.2-11.gitd3c94f0.el7 | 0:0.0.2-11.gitd3c94f0.el7 |
| Red Hat:openshift:4.2::el7 | openshift-external-storage-manila-provisioner | before 0:0.0.2-11.gitd3c94f0.el7 | 0:0.0.2-11.gitd3c94f0.el7 |
| Red Hat:openshift:4.2::el7 | openshift-external-storage-snapshot-controller | before 0:0.0.2-11.gitd3c94f0.el7 | 0:0.0.2-11.gitd3c94f0.el7 |
+1
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 |
|---|---|---|
| Go:github.com/kubernetes-csi/external-provisioner | 0.4.3 | Package registry (OSV) |
| Go:github.com/kubernetes-csi/external-provisioner | 1.0.2 | Package registry (OSV) |
| Go:github.com/kubernetes-csi/external-provisioner | 1.2.2 | Package registry (OSV) |
| Go:github.com/kubernetes-csi/external-provisioner | 1.3.1 | Package registry (OSV) |
| Go:github.com/kubernetes-csi/external-snapshotter/v6 | 1.0.2 | Package registry (OSV) |
| Go:github.com/kubernetes-csi/external-snapshotter/v6 | 1.2.2 | Package registry (OSV) |
| red hat:openshift-external-storage | 0:0.0.2-10.gitd3c94f0.el7 · Red Hat:openshift:3.11::el7 | Package registry (OSV) |
| red hat:openshift-external-storage-cephfs-provisioner | 0:0.0.2-10.gitd3c94f0.el7 · Red Hat:openshift:3.11::el7 | Package registry (OSV) |
| red hat:openshift-external-storage-debuginfo | 0:0.0.2-10.gitd3c94f0.el7 · Red Hat:openshift:3.11::el7 | Package registry (OSV) |
| red hat:openshift-external-storage-efs-provisioner | 0:0.0.2-10.gitd3c94f0.el7 · Red Hat:openshift:3.11::el7 | Package registry (OSV) |
| red hat:openshift-external-storage-local-provisioner | 0:0.0.2-10.gitd3c94f0.el7 · Red Hat:openshift:3.11::el7 | Package registry (OSV) |
| red hat:openshift-external-storage-manila-provisioner | 0:0.0.2-10.gitd3c94f0.el7 · Red Hat:openshift:3.11::el7 | Package registry (OSV) |
| red hat:openshift-external-storage-snapshot-controller | 0:0.0.2-10.gitd3c94f0.el7 · Red Hat:openshift:3.11::el7 | Package registry (OSV) |
| red hat:openshift-external-storage-snapshot-provisioner | 0:0.0.2-10.gitd3c94f0.el7 · Red Hat:openshift:3.11::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.
- Administrator privileges are required.
- 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
- High
- 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:H/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✗ → ✓
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References
Show all references (6 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.