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Bug 1564305 - (CVE-2018-1002100) CVE-2018-1002100 kubernetes: Kubectl copy doesn't check for paths outside of it's destination directory
CVE-2018-1002100 kubernetes: Kubectl copy doesn't check for paths outside of ...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20180317,repor...
: Security
Depends On: 1564307 1564337 1567207 1567208 1577292 1577293
Blocks: 1569667
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Reported: 2018-04-05 20:09 EDT by Jason Shepherd
Modified: 2018-10-27 17:43 EDT (History)
21 users (show)

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An improper validation flaw exists in the kubernetes 'kubectl cp' command. An attacker who could trick a user into using the command to copy files locally, from a pod, could override files outside of the target directory of the command.
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Description Jason Shepherd 2018-04-05 20:09:51 EDT 
When using kubectl to cp files to a pod, if the container returns a malformed tarfile with paths like, '/some/remote/dir/../../../../tmp/foo' kubectl writes this to /tmp/foo instead of /some/local/dir/tmp/foo.

https://github.com/kubernetes/kubernetes/issues/61297
Comment 1 Jason Shepherd 2018-04-05 20:10:05 EDT 
Acknowledgments:

Name: Michael Hanselmann (hansmi.ch)
Comment 2 Jason Shepherd 2018-04-05 20:10:44 EDT 
Created kubernetes tracking bugs for this issue:

Affects: fedora-all [bug 1564307]
Comment 6 Cedric Buissart 2018-04-12 03:54:02 EDT 
Statement:

Kubernetes support is moving from Red Hat Enterprise Linux to OpenShift Container Platform.  Kubernetes and its dependencies will no longer be updated through the Extras channel. Instead, the Red Hat customers are advised to use Red Hat's supported Kubernetes-based products such as Red Hat OpenShift Container Platform.
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