GHSA-x6mj-w4jf-jmgw CVE-2020-8555 GO-2022-0890
Server Side Request Forgery (SSRF) in Kubernetes
- Severity
- 6.3 / 10
- Medium · CVSS 3.1
- Exploit chance (EPSS)
- 3.68%
- Chance of exploitation in the next 30 days. Higher than 89.68% of scored vulnerabilities.
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- CWE-918 Server-Side Request Forgery (SSRF)
- Fix
1.18.1- Upgrade k8s.io/kubernetes to this version or later
Description
The Kubernetes kube-controller-manager in versions v1.0-1.14, versions prior to v1.15.12, v1.16.9, v1.17.5, and version v1.18.0 are vulnerable to a Server Side Request Forgery (SSRF) that allows certain authorized users to leak up to 500 bytes of arbitrary information from unprotected endpoints within the master's host network (such as link-local or loopback services).
Affected versions
Go
| Package | Vulnerable | Fixed in |
|---|---|---|
| k8s.io/kubernetes | >= 1.18.0, < 1.18.1 |
1.18.1 |
| k8s.io/kubernetes | >= 1.17.0, < 1.17.4 |
1.17.4 |
| k8s.io/kubernetes | >= 1.16.0, < 1.16.9 |
1.16.9 |
| k8s.io/kubernetes | < 1.15.12 |
1.15.12 |
| k8s.io/kubernetes | < 1.15.12>= 1.16.0, < 1.16.9>= 1.17.0, < 1.17.4>= 1.18.0, < 1.18.1 |
1.15.121.16.91.17.41.18.1 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
k8s.io/kubernetes Go → 1.18.1
- go
go get k8s.io/kubernetes@v1.18.1 && go mod tidy
Severity breakdown
CVSS 3.1 6.3
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Weakness
CWE-918: Server-Side Request Forgery (SSRF)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
References
Advisories
Other links
- github.com/kubernetes/kubernetes/issues/91542
- github.com/kubernetes/kubernetes/pull/89794
- groups.google.com/d/topic/kubernetes-security-announce/kEK27tqqs30/discussion
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3SOCL…
- security.netapp.com/advisory/ntap-20200724-0005
- openwall.com/lists/oss-security/2020/06/01/4
- openwall.com/lists/oss-security/2021/05/04/8
Timeline
- Published
- Last updated by the source
- Latest EPSS score
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-r6j8-c6r2-37rr kube-controller-manager is vulnerable to half-blind Server Side Request Forgery through in-tree Portworx StorageClass | Medium | Also affects k8s.io/kubernetes |
| GHSA-4x4m-3c2p-qppc Kubernetes Nodes can delete themselves by adding an OwnerReference | Medium | Also affects k8s.io/kubernetes |
| GHSA-hj2p-8wj8-pfq4 kubernetes allows nodes to bypass dynamic resource allocation authorization checks | Low | Also affects k8s.io/kubernetes |
| GO-2025-3547 Kubernetes kube-apiserver Vulnerable to Race Condition | Low | Also affects k8s.io/kubernetes |
| GHSA-3wgm-2gw2-vh5m Kubernetes GitRepo Volume Inadvertent Local Repository Access | Medium | Also affects k8s.io/kubernetes |
| GHSA-vv39-3w5q-974q Kubernetes allows Command Injection affecting Windows nodes via nodes/*/logs/query API | Medium | Also affects k8s.io/kubernetes |
| GHSA-jgfp-53c3-624w Node Denial of Service via kubelet Checkpoint API | Medium | Also affects k8s.io/kubernetes |
| GHSA-27wf-5967-98gx Kubernetes kubelet arbitrary command execution | High | Also affects k8s.io/kubernetes |
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