kubectl cp allows symlink directory traversal (Kubernetes Kubernetes)
At a glance
- Source
- NVD
- EPSS
- EPSS 3.75 % · percentile 90 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- kubernetes
- NVD status
- Modified
Description
The kubectl cp command allows copying files between containers and the user machine. To copy files from a container, Kubernetes runs tar inside the container to create a tar archive, copies it over the network, and kubectl unpacks it on the user’s machine. If the tar binary in the container is malicious, it could run any code and output unexpected, malicious results. An attacker could use this to write files to any path on the user’s machine when kubectl cp is called, limited only by the system permissions of the local user. Kubernetes affected versions include versions prior to 1.13.9, versions prior to 1.14.5, versions prior to 1.15.2, and versions 1.1, 1.2, 1.4, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 1.10, 1.11, 1.12.
Weaknesses (CWE)
- CWE-61 — UNIX Symbolic Link (Symlink) Following
- CWE-22 — Improper Limitation of a Pathname to a Restricted Directory
References
- https://groups.google.com/d/msg/kubernetes-security-announce/vUtEcSEY6SM/v2ZZxsmtFQAJ
- https://github.com/kubernetes/kubernetes/issues/80984
- https://security.netapp.com/advisory/ntap-20190919-0003/
- https://access.redhat.com/errata/RHBA-2019:2816
- https://access.redhat.com/errata/RHBA-2019:2794
- https://access.redhat.com/errata/RHBA-2019:2824
- https://access.redhat.com/errata/RHSA-2019:3239
- https://access.redhat.com/errata/RHSA-2019:3811
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | MEDIUM 4.8 | CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N | kubernetes |
| CVSS 3.1 | MEDIUM 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N | NVD · nvd@nist.gov (Primary) |
| CVSS 3.0 | MEDIUM 4.8 | CVSS:3.0/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N | NVD · jordan@liggitt.net (Secondary) |
| CVSS 2.0 | MEDIUM 5.8 | AV:N/AC:M/Au:N/C:N/I:P/A:P | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2019-2944
- GCVE · GCVE-0-2019-11249
CERT-FR advisories
- CERTFR-2022-AVI-591 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*≥ 1.0.0 ≤ 1.12.10cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*≥ 1.13.0 < 1.13.9cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*≥ 1.14.0 < 1.14.5cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:*≥ 1.15.0 < 1.15.2cpe:2.3:a:kubernetes:kubernetes:1.12.11:beta0:*:*:*:*:*:*cpe:2.3:a:redhat:openshift_container_platform:3.9:*:*:*:*:*:*:*cpe:2.3:a:redhat:openshift_container_platform:3.10:*:*:*:*:*:*:*cpe:2.3:a:redhat:openshift_container_platform:3.11:*:*:*:*:*:*:*cpe:2.3:a:redhat:openshift_container_platform:4.1:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Kubernetes · Kubernetes | affected prior to 1.13.9 ; affected prior to 1.14.5 ; affected prior to 1.15.2 ; affected 1.1 ; affected 1.2 ; affected 1.4 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |