Argo CD Improper Auth: OIDC Audience Claim Not Validated v1.8.22.6.0-rc-2
CVE-2023-22482 Published on January 26, 2023
JWT audience claim is not verified
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.
Vulnerability Analysis
CVE-2023-22482 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2023-22482 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2023-22482
stack.watch emails you whenever new vulnerabilities are published in Linux Foundation Argo Cd or Argoproj Argo Cd. Just hit a watch button to start following.
Affected Versions
argoproj argo-cd:- Version >= 1.8.2, < 2.3.13 is affected.
- Version >= 2.4.0-rc1, < 2.4.19 is affected.
- Version >= 2.5.0-rc1, < 2.5.6 is affected.
- Version >= 2.6.0-rc1, < 2.6.0-rc3 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.