Bug 1685213 (CVE-2019-1002101) - CVE-2019-1002101 kubernetes: Mishandling of symlinks allows for arbitrary file write via `kubectl cp`
Summary: CVE-2019-1002101 kubernetes: Mishandling of symlinks allows for arbitrary fil...
Keywords:
Status: NEW
Alias: CVE-2019-1002101
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1693881 1693882 1693885 1686294 1686295 1687658 1687659 1693315 1693318 1693320 1693884
Blocks: 1685214
TreeView+ depends on / blocked
 
Reported: 2019-03-04 16:51 UTC by Andrej Nemec
Modified: 2019-09-29 15:08 UTC (History)
36 users (show)

Fixed In Version: kubernetes 1.11.9, kubernetes 1.12.7, kubernetes 1.13.5, kubernetes 1.14.0
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in Kubernetes via the mishandling of symlinks when copying files from a running container. An attacker could exploit this by convincing a user to use `kubectl cp` or `oc cp` with a malicious container, allowing for arbitrary files to be overwritten on the host machine.
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Environment:
Last Closed:


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Description Andrej Nemec 2019-03-04 16:51:27 UTC
A potential symlink escape vulnerability was found in Kubernetes after 1.9.0-alpha. A compromised container could potentially be used to achieve code execution.

Introduced by:

https://github.com/kubernetes/kubernetes/commit/b1f85e2dfec6e64d8e1bc272251277df0058ab20

Comment 1 Andrej Nemec 2019-03-06 09:21:57 UTC
Acknowledgments:

Name: Ariel Zelivansky (Twistlock)

Comment 5 Hardik Vyas 2019-03-08 09:38:33 UTC
heketi-8.0.0 shipped with Gluster uses Kubernetes version v1.5.5 which is too old and the vulnerable code is not present which was introduced in v1.9.0-alpha.2.

Comment 7 Sam Fowler 2019-03-12 04:57:09 UTC
Statement:

This issue affects Kubernetes starting from version 1.9. OpenShift Container Platform (OCP) versions 3.9 and later are also affected.

This issue did not affect the version of Kubernetes(embedded in heketi) shipped with Red Hat Gluster Storage 3 as it does not contain the vulnerable code.

Comment 10 Laura Pardo 2019-03-28 21:16:47 UTC
Upstream Patch:
https://github.com/kubernetes/kubernetes/pull/75037

Comment 12 Laura Pardo 2019-03-28 21:17:49 UTC
Created kubernetes tracking bugs for this issue:

Affects: fedora-all [bug 1693884]


Created kubernetes:1.1/kubernetes tracking bugs for this issue:

Affects: fedora-29 [bug 1693881]


Created kubernetes:openshift-3.10/origin tracking bugs for this issue:

Affects: fedora-29 [bug 1693882]


Created origin tracking bugs for this issue:

Affects: fedora-all [bug 1693885]


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