kubernetes/ingress-nginx · Security
Ingress-nginx `path` sanitization can be bypassed with newline character
- GHSA ID
- GHSA-863x-868h-968x
- CVE ID
- CVE-2021-25748
- Severity
- medium
- Published
- Updated
- CVSS
- 6.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CVSS v3
- 6.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Description
A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use a newline character to bypass the sanitization of the spec.rules[].http.paths[].path field of an Ingress object (in the networking.k8s.io or extensions API group) to obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster.
CWEs
- CWE-20 · Improper Input Validation
References
- https://nvd.nist.gov/vuln/detail/CVE-2021-25748 ↗
- https://github.com/kubernetes/ingress-nginx/issues/8686 ↗
- https://groups.google.com/g/kubernetes-security-announce/c/avaRYa9c7I8 ↗
- https://github.com/kubernetes/ingress-nginx/pull/8623 ↗
- https://github.com/kubernetes/ingress-nginx/releases/tag/controller-v1.2.1 ↗
- https://github.com/advisories/GHSA-863x-868h-968x ↗