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Posted to yarn-issues@hadoop.apache.org by "Billie Rinaldi (Jira)" <ji...@apache.org> on 2019/09/05 21:22:00 UTC
[jira] [Updated] (YARN-9718) Yarn REST API, services endpoint
remote command ejection
[ https://issues.apache.org/jira/browse/YARN-9718?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Billie Rinaldi updated YARN-9718:
---------------------------------
Attachment: YARN-9718-branch-3.1.01.patch
> Yarn REST API, services endpoint remote command ejection
> --------------------------------------------------------
>
> Key: YARN-9718
> URL: https://issues.apache.org/jira/browse/YARN-9718
> Project: Hadoop YARN
> Issue Type: Bug
> Affects Versions: 3.1.0, 3.2.0, 3.1.1, 3.1.2
> Reporter: Eric Yang
> Assignee: Eric Yang
> Priority: Major
> Attachments: YARN-9718-branch-3.1.01.patch, YARN-9718.001.patch, YARN-9718.002.patch, YARN-9718.003.patch, YARN-9718.004.patch
>
>
> Email from Oskars Vegeris:
>
> During internal infrastructure testing it was discovered that the Hadoop Yarn REST endpoint /app/v1/services contains a command injection vulnerability.
>
> The services endpoint's normal use-case is for launching containers (e.g. Docker images/apps), however by providing an argument with special shell characters it is possible to execute arbitrary commands on the Host server - this would allow to escalate privileges and access.
>
> The command injection is possible in the parameter for JVM options - "yarn.service.am.java.opts". It's possible to enter arbitrary shell commands by using sub-shell syntax `cmd` or $(cmd). No shell character filtering is performed.
>
> The "launch_command" which needs to be provided is meant for the container and if it's not being run in privileged mode or with special options, host OS should not be accessible.
>
> I've attached a minimal request sample with an injected 'ping' command. The endpoint can also be found via UI @ [http://yarn-resource-manager:8088/ui2/#/yarn-services]
>
> If no auth, or "simple auth" (username) is enabled, commands can be executed on the host OS. I know commands can also be ran by the "new-application" feature, however this is clearly not meant to be a way to touch the host OS.
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