Improper input validation in Kubernetes
CVE-2021-25741
A security issue was discovered in Kubernetes where a user may be able to create a container with subpath volume mounts to access files & directories outside of the volume, including on the host filesystem.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.080 (94.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.080 · newest: 0.080 · change: 0.000
Affected products
- Kubernetes — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s (Mailing List, Mitigation)
- github.com/kubernetes/kubernetes/issues/104980 (Third Party Advisory, Mitigation)
- security.netapp.com/advisory/ntap-20211008-0006/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-25741?
- CVE-2021-25741 is a high-severity vulnerability in Kubernetes, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2021-09-20.
- How severe is CVE-2021-25741?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2021-25741 known to be exploited?
- 38 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.