Improper input validation in Kubernetes
CVE-2023-2728
Users may be able to launch containers that bypass the mountable secrets policy enforced by the ServiceAccount admission plugin when using ephemeral containers. The policy ensures pods running with a service account may only reference secrets specified in the service account’s secrets field. Kubernetes clusters are only affected if the ServiceAccount admission plugin and the `kubernetes.io/enforce-mountable-secrets` annotation are used together with ephemeral containers.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.022 (80.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Kubernetes — versions v1.24.14, v1.25.0 - v1.25.10, v1.26.0 - v1.26.5
Weakness classification (CWE)
Public proof-of-concept exploits
References
- jordan@liggitt.net (mailing-list, Mailing List)
- jordan@liggitt.net (issue-tracking, Issue Tracking)
- jordan@liggitt.net (Mailing List)
- jordan@liggitt.net
Frequently asked questions
- What is CVE-2023-2728?
- CVE-2023-2728 is a medium-severity vulnerability in Kubernetes, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2023-07-03.
- How severe is CVE-2023-2728?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2023-2728 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.