Auth bypass in Argoproj Argo-Cd
CVE-2023-23947
Argo CD is a declarative, GitOps continuous delivery tool for Kubernetes. All Argo CD versions starting with 2.3.0-rc1 and prior to 2.3.17, 2.4.23 2.5.11, and 2.6.2 are vulnerable to an improper authorization bug which allows users who have the ability to update at least one cluster secret to update any cluster secret. The attacker could use this access to escalate privileges (potentially controlling Kubernetes resources) or to break Argo CD functionality (by preventing connections to external clusters). A patch for this vulnerability has been released in Argo CD versions 2.6.2, 2.5.11, 2.4.23, and 2.3.17. Two workarounds are available. Either modify the RBAC configuration to completely revoke all `clusters, update` access, or use the `destinations` and `clusterResourceWhitelist` fields to apply similar restrictions as the `namespaces` and `clusterResources` fields.
Vulnerability class: Broken Access Control
EPSS: 0.007 (49.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Argoproj Argo-cd — versions >= 2.3.0-rc1, < 2.3.17, >= 2.4.0, < 2.4.23, >= 2.5.0, < 2.5.11
- Argoproj Argo_cd
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2023-23947?
- CVE-2023-23947 is a critical-severity vulnerability in Argoproj Argo-Cd, classified under Incorrect Authorization. CVSS score: 9.1/10. Published 2023-02-16.
- How severe is CVE-2023-23947?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2023-23947 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.