CVE-2019-11251: kubectl cp allows symlink directory traversal
First published: Wed Sep 18 2019(Updated: )
The Kubernetes kubectl cp command in versions 1.1-1.12, and versions prior to 1.13.11, 1.14.7, and 1.15.4 allows a combination of two symlinks provided by tar output of a malicious container to place a file outside of the destination directory specified in the kubectl cp invocation. This could be used to allow an attacker to place a nefarious file using a symlink, outside of the destination tree.
Credit: jordan@liggitt.net jordan@liggitt.net
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/atomic-openshift | <0:3.11.154-1.git.0.7a097ad.el7 | 0:3.11.154-1.git.0.7a097ad.el7 |
| redhat/atomic-openshift | <0:3.9.102-1.git.0.6411f52.el7 | 0:3.9.102-1.git.0.6411f52.el7 |
| redhat/openshift | <0:4.1.21-201910220952.git.0.493dbf6.el7 | 0:4.1.21-201910220952.git.0.493dbf6.el7 |
| Kubernetes Kubernetes | >=1.13.0<1.13.11 | |
| Kubernetes Kubernetes | >=1.14.0<1.14.7 | |
| Kubernetes Kubernetes | >=1.15.0<1.15.4 | |
| Kubernetes Kubernetes | =1.1-1.12 | |
| go/k8s.io/kubernetes | >=1.15.3<1.16.0 | 1.16.0 |
| go/k8s.io/kubernetes | >=1.14.6<1.14.7 | 1.14.7 |
| go/k8s.io/kubernetes | >=1.13.10<1.13.11 | 1.13.11 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2019-11251
- https://github.com/kubernetes/kubernetes/issues/87773
- https://github.com/kubernetes/kubernetes/pull/82143
- https://groups.google.com/d/msg/kubernetes-announce/YYtEFdFimZ4/nZnOezZuBgAJ
- https://github.com/advisories/GHSA-6qfg-8799-r575 (Advisory)
- https://github.com/kubernetes/kubernetes/pull/82384
- https://github.com/kubernetes/kubernetes/pull/82502
- https://github.com/kubernetes/kubernetes/pull/82503
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1753496
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1753497
- https://groups.google.com/forum/#!msg/kubernetes-announce/YYtEFdFimZ4/nZnOezZuBgAJ
- https://access.redhat.com/errata/RHSA-2019:3266
- https://access.redhat.com/errata/RHSA-2019:3267
- https://access.redhat.com/security/cve/cve-2019-11251
- https://access.redhat.com/errata/RHSA-2019:3811
- https://access.redhat.com/errata/RHSA-2019:3905
- https://bugzilla.redhat.com/show_bug.cgi?id=1753495
- https://www.cve.org/CVERecord?id=CVE-2019-11251 https://nvd.nist.gov/vuln/detail/CVE-2019-11251 https://groups.google.com/forum/#!msg/kubernetes-announce/YYtEFdFimZ4/nZnOezZuBgAJ
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2019-11251.
What is the severity of CVE-2019-11251?
The severity of CVE-2019-11251 is medium with a severity value of 5.7.
Which versions of Kubernetes are affected by CVE-2019-11251?
Versions 1.1-1.12 and versions prior to 1.13.11, 1.14.7, and 1.15.4 of Kubernetes are affected by CVE-2019-11251.
How can the CVE-2019-11251 vulnerability be fixed?
To fix the CVE-2019-11251 vulnerability, update Kubernetes to version 1.16.0 or above, or to versions 1.13.11, 1.14.7, or 1.15.4.
Where can I find more information about CVE-2019-11251?
You can find more information about CVE-2019-11251 at the following references: [CVE.org](https://www.cve.org/CVERecord?id=CVE-2019-11251), [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-11251), [Red Hat Bugzilla](https://bugzilla.redhat.com/show_bug.cgi?id=1753495), and [Red Hat Security Advisory](https://access.redhat.com/errata/RHSA-2019:3905).
- collector/github-advisory-latest
- alias/GHSA-6qfg-8799-r575
- alias/CVE-2019-11251
- collector/github-advisory
- collector/redhat-cve
- collector/nvd-index
- collector/nvd-cve
- agent/author
- agent/weakness
- agent/type
- agent/first-publish-date
- agent/softwarecombine
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- collector/redhat-bugzilla
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- collector/mitre-cve
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- canonical/kubernetes kubernetes
- version/kubernetes kubernetes/1.13.0
- version/kubernetes kubernetes/1.14.0
- version/kubernetes kubernetes/1.15.0
- version/kubernetes kubernetes/1.1-1.12