CVE-2022-29165 Information

Description

Argo CD is a declarative GitOps continuous delivery tool for Kubernetes. A critical vulnerability has been discovered in Argo CD starting with version 1.4.0 and prior to versions 2.1.15 2.2.9 and 2.3.4 which would allow unauthenticated users to impersonate as any Argo CD user or role including the admin user by sending a specifically crafted JSON Web Token (JWT) along with the request. In order for this vulnerability to be exploited anonymous access to the Argo CD instance must have been enabled. In a default Argo CD installation anonymous access is disabled. The vulnerability can be exploited to impersonate as any user or role including the built-in admin account regardless of whether it is enabled or disabled. Also the attacker does not need an account on the Argo CD instance in order to exploit this. If anonymous access to the instance is enabled an attacker can escalate their privileges effectively allowing them to gain the same privileges on the cluster as the Argo CD instance which is cluster admin in a default installation. This will allow the attacker to create manipulate and delete any resource on the cluster. They may also exfiltrate data by deploying malicious workloads with elevated privileges thus bypassing any redaction of sensitive data otherwise enforced by the Argo CD API. A patch for this vulnerability has been released in Argo CD versions 2.3.4 2.2.9 and 2.1.15. As a workaround one may disable anonymous access but upgrading to a patched version is preferable.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Reference

https://github.com/argoproj/argo-cd/releases/tag/v2.2.9 https://github.com/argoproj/argo-cd/security/advisories/GHSA-r642-gv9p-2wjj https://github.com/argoproj/argo-cd/releases/tag/v2.3.4 https://github.com/argoproj/argo-cd/releases/tag/v2.1.15

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

10.0