Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. Versions of Argo CD starting with v1.8.2 and prior to 2.3.13, 2.4.19, 2.5.6, and 2.6.0-rc-3 are vulnerable to an improper authorization bug causing the API to accept certain invalid tokens. OIDC providers include an `aud` (audience) claim in signed tokens. The value of that claim specifies the intended audience(s) of the token (i.e. the service or services which are meant to accept the token). Argo CD _does_ validate that the token was signed by Argo CD's configured OIDC provider. But Argo CD _does not_ validate the audience claim, so it will accept tokens that are not intended for Argo CD. If Argo CD's configured OIDC provider also serves other audiences (for example, a file storage service), then Argo CD will accept a token intended for one of those other audiences. Argo CD will grant the user privileges based on the token's `groups` claim, even though those groups were not intended to be used by Argo CD. This bug also increases the impact of a stolen token. If an attacker steals a valid token for a different audience, they can use it to access Argo CD. A patch for this vulnerability has been released in versions 2.6.0-rc3, 2.5.6, 2.4.19, and 2.3.13. There are no workarounds.
2023-01-26T21:18:12.213
2024-11-21T07:44:53.733
Modified
CVSSv3.1: 9.0 (CRITICAL)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | argoproj | argo_cd | < 2.3.14 | Yes |
| Application | argoproj | argo_cd | < 2.4.20 | Yes |
| Application | argoproj | argo_cd | < 2.5.8 | Yes |
| Application | argoproj | argo_cd | 2.6.0 | Yes |
| Application | argoproj | argo_cd | 2.6.0 | Yes |
| Application | argoproj | argo_cd | 2.6.0 | Yes |
| Application | argoproj | argo_cd | 2.6.0 | Yes |