CVE-2021-25741
high
CVSS v3
—
CVSS v2
—
VIR risk
8.0
Description
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.
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-25741
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-25741.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 1.22.2-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 1.20.5+really1.20.2-1 |
| debian | bullseye | fixed | 1.20.5+really1.20.2-1 |
| debian | forky | fixed | 1.20.5+really1.20.2-1 |
| debian | sid | fixed | 1.20.5+really1.20.2-1 |
| debian | trixie | fixed | 1.20.5+really1.20.2-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Go | k8s.io/kubernetes | <1.19.15 | 1.19.15 |
| Go | k8s.io/kubernetes | >=1.20.0,<1.20.11 | 1.20.11 |
| Go | k8s.io/kubernetes | >=1.21.0,<1.21.5 | 1.21.5 |
| Go | k8s.io/kubernetes | >=1.22.0,<1.22.2 | 1.22.2 |
References
- https://www.suse.com/security/cve/CVE-2021-25741.html
- https://github.com/bottlerocket-os/bottlerocket/security/advisories/GHSA-f5f7-6478-qm6p
- https://nvd.nist.gov/vuln/detail/CVE-2021-25741
- https://github.com/kubernetes/kubernetes/issues/104980
- https://github.com/kubernetes/kubernetes
- https://groups.google.com/g/kubernetes-security-announce/c/nyfdhK24H7s
- https://security.netapp.com/advisory/ntap-20211008-0006
- https://security-tracker.debian.org/tracker/CVE-2021-25741
Verify integrity in audit chain (admin only). AS-IS.