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Rancher Vulnerable to Cross-site Request Forgery (CSRF)

High severity GitHub Reviewed Published May 18, 2021 to the GitHub Advisory Database • Updated Sep 18, 2023

Package

gomod github.com/rancher/rancher (Go)

Affected versions

>= 2.0.0, < 2.0.16
>= 2.1.0, < 2.1.11
>= 2.2.0, < 2.2.5

Patched versions

2.0.16
2.1.11
2.2.5

Description

Rancher 2 through 2.2.4 is vulnerable to a Cross-Site Websocket Hijacking attack that allows an exploiter to gain access to clusters managed by Rancher. The attack requires a victim to be logged into a Rancher server, and then to access a third-party site hosted by the exploiter. Once that is accomplished, the exploiter is able to execute commands against the cluster's Kubernetes API with the permissions and identity of the victim.

References

Published by the National Vulnerability Database Sep 4, 2019
Reviewed May 17, 2021
Published to the GitHub Advisory Database May 18, 2021
Last updated Sep 18, 2023

Severity

High

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
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
None
Availability
High

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:L/PR:L/UI:R/S:C/C:H/I:N/A:H

EPSS score

0.094%
(41st percentile)

Weaknesses

CVE ID

CVE-2019-13209

GHSA ID

GHSA-xhg2-rvm8-w2jh

Source code

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