Skip to content

Server Side Request Forgery (SSRF) in Kubernetes

Moderate severity GitHub Reviewed Published Feb 15, 2022 to the GitHub Advisory Database • Updated Sep 18, 2023

Package

gomod k8s.io/kubernetes (Go)

Affected versions

>= 1.18.0, < 1.18.1
>= 1.17.0, < 1.17.4
>= 1.16.0, < 1.16.9
< 1.15.12

Patched versions

1.18.1
1.17.4
1.16.9
1.15.12

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).

References

Published by the National Vulnerability Database Jun 5, 2020
Reviewed May 13, 2021
Published to the GitHub Advisory Database Feb 15, 2022
Last updated Sep 18, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N

EPSS score

0.098%
(42nd percentile)

Weaknesses

CVE ID

CVE-2020-8555

GHSA ID

GHSA-x6mj-w4jf-jmgw

Source code

No known source code
Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.