Resource exhaustion in Kubernetes - CVE-2019-1002100
Published: April 1, 2019 / Updated: July 17, 2020
Vulnerability identifier: #VU31127
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-1002100
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Kubernetes
Affected software:
Kubernetes
Kubernetes
Detailed vulnerability description
The vulnerability allows a remote authenticated user to perform a denial of service (DoS) attack.
In all Kubernetes versions prior to v1.11.8, v1.12.6, and v1.13.4, users that are authorized to make patch requests to the Kubernetes API Server can send a specially crafted patch of type "json-patch" (e.g. `kubectl patch --type json` or `"Content-Type: application/json-patch+json"`) that consumes excessive resources while processing, causing a Denial of Service on the API Server.
How to mitigate CVE-2019-1002100
Install update from vendor's website.
Sources
- http://www.securityfocus.com/bid/107290
- https://access.redhat.com/errata/RHSA-2019:1851
- https://access.redhat.com/errata/RHSA-2019:3239
- https://github.com/kubernetes/kubernetes/issues/74534
- https://groups.google.com/forum/#!topic/kubernetes-announce/vmUUNkYfG9g
- https://security.netapp.com/advisory/ntap-20190416-0002/