Auth bypass in Ovn Ovn-Kubernetes

CVE-2021-3499

A vulnerability was found in OVN Kubernetes in versions up to and including 0.3.0 where the Egress Firewall does not reliably apply firewall rules when there is multiple DNS rules. It could lead to potentially lose of confidentiality, integrity or availability of a service.

Vulnerability class: Broken Access Control

Published · last modified .

CVSS v3 metric

CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.008 (54.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-3499: held from 0.008 to 0.008.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

  • Ovn Ovn-Kubernetes
  • Openshift/ovn-Kubernetes — versions All ovn-kubernetes versions up to and including 0.3.0

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-3499?
CVE-2021-3499 is a medium-severity vulnerability in Ovn Ovn-Kubernetes, classified under Incorrect Authorization. CVSS score: 5.6/10. Published 2021-06-02.
How severe is CVE-2021-3499?
Medium severity. CVSS v3 base score is 5.6 out of 10.