Description (CNA)
kyverno before 1.19.1 fails to properly validate URL-encoded path segments in Policy apiCall urlPath, allowing namespace tenants to bypass the per-namespace clamp and create objects in other namespaces as the admission-controller ServiceAccount. Attackers can exploit this by using percent-encoded directory traversal sequences to create MutatingWebhookConfiguration objects cluster-wide or PolicyException objects in the kyverno namespace, enabling privilege escalation to cluster admin.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| kyverno / kyverno | affected 0 before 1.19.1; unaffected 1.19.1 |
CWE
CWE-441
References
- https://github.com/kyverno/kyverno/security/advisories/GHSA-5qq8-67g6-4h2w
- https://www.vulncheck.com/advisories/kyverno-before-1.19.1-privilege-escalation-via-policy-apicall-urlpath
ADP enrichment
No English description supplied.
No references supplied.