Improper input validation in Kubernetes Ingress-Nginx
CVE-2021-25746
A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use .metadata.annotations in 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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L.
EPSS exploit prediction
EPSS: 0.014 (72.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 72.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: +0.000
Affected products
- Kubernetes Ingress-Nginx
- Kubernetes Ingress-Nginx — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- groups.google.com/g/kubernetes-security-announce/c/hv2-SfdqcfQ (Third Party Advisory, Mitigation, Issue Tracking)
- github.com/kubernetes/ingress-nginx/issues/8503 (Third Party Advisory, Mitigation, Issue Tracking)
- security.netapp.com/advisory/ntap-20220609-0006/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-25746?
- CVE-2021-25746 is a high-severity vulnerability in Kubernetes Ingress-Nginx, classified under Improper Input Validation. CVSS score: 7.6/10. Published 2022-05-06.
- How severe is CVE-2021-25746?
- High severity. CVSS v3 base score is 7.6 out of 10.
- Is CVE-2021-25746 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.