SB2019040111 - Resource exhaustion in Kubernetes Kubernetes
Published: April 1, 2019 Updated: July 17, 2020
Security Bulletin ID
SB2019040111
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Resource exhaustion (CVE-ID: CVE-2019-1002100)
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.
Remediation
Install update from vendor's website.
References
- 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/