Auth bypass in Argoproj Argo-Cd
CVE-2023-22482
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 class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (58.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Argoproj Argo-Cd — versions >= 1.8.2, < 2.3.13, >= 2.4.0-rc1, < 2.4.19, >= 2.5.0-rc1, < 2.5.6
- Argoproj Argo Cd — versions 2.6.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/argoproj/argo-cd/security/advisories/GHSA-q9hr-j4rf-8fjc (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2023-22482?
- CVE-2023-22482 is a critical-severity vulnerability in Argoproj Argo-Cd, classified under Incorrect Authorization. CVSS score: 9.0/10. Published 2023-01-26.
- How severe is CVE-2023-22482?
- Critical severity. CVSS v3 base score is 9.0 out of 10.
- Is CVE-2023-22482 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.