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https://issues.apache.org/jira/browse/SPARK-20922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16029344#comment-16029344
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Sean Owen commented on SPARK-20922:
-----------------------------------
This is not the same as https://issues.apache.org/jira/browse/SPARK-11652 I
take it.
[~vanzin] can maybe comment on the mechanics here, but it also sounds like the
suggestion is that this gets around the shared secret because deserializing the
message itself causes something to be executed.
Still, you have to be on the localhost to make the connection, right?
> Unsafe deserialization in Spark LauncherConnection
> --------------------------------------------------
>
> Key: SPARK-20922
> URL: https://issues.apache.org/jira/browse/SPARK-20922
> Project: Spark
> Issue Type: Bug
> Components: Spark Submit
> Affects Versions: 2.1.1
> Reporter: Aditya Sharad
> Labels: security
> Attachments: spark-deserialize-master.zip
>
>
> The {{run()}} method of the class
> {{org.apache.spark.launcher.LauncherConnection}} performs unsafe
> deserialization of data received by its socket. This makes Spark applications
> launched programmatically using the {{SparkLauncher}} framework potentially
> vulnerable to remote code execution by an attacker with access to any user
> account on the local machine. Such an attacker could send a malicious
> serialized Java object to multiple ports on the local machine, and if this
> port matches the one (randomly) chosen by the Spark launcher, the malicious
> object will be deserialized. By making use of gadget chains in code present
> on the Spark application classpath, the deserialization process can lead to
> RCE or privilege escalation.
> This vulnerability is identified by the “Unsafe deserialization” rule on
> lgtm.com:
> https://lgtm.com/projects/g/apache/spark/snapshot/80fdc2c9d1693f5b3402a79ca4ec76f6e422ff13/files/launcher/src/main/java/org/apache/spark/launcher/LauncherConnection.java#V58
>
> Attached is a proof-of-concept exploit involving a simple
> {{SparkLauncher}}-based application and a known gadget chain in the Apache
> Commons Beanutils library referenced by Spark.
> See the readme file for demonstration instructions.
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