CVE-2021-25746

Ingress-nginx directive injection via annotations

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.

Affected

Kubernetes · Kubernetes ingress-nginx

CVSS v3.1 NVD

7.1 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

CVSS v3.1 LIGGITT

7.6 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L

CVSS v2.0 NVD

5.5 MEDIUMAV:N/AC:L/Au:S/C:P/I:P/A:N

EPSS

1.44% chance of exploitation in the next 30 days, 73rd percentile

Published

2022-05-06

Updated

2024-09-17

Proof-of-concept exploits (1)

• cloud-Xolt/CVE0★ · 2023-11-30

Security advisories

• kubernetes/ingress-nginx/issues/8503
• https://groups.google.com/g/kubernetes-security-announce/c/hv2-SfdqcfQ
• https://security.netapp.com/advisory/ntap-20220609-0006

References

• CVE Record
• NVD entry

Related

• CVE-2021-25742
• CVE-2021-25745
• CVE-2021-25748
• CVE-2023-5044