Description
An unauthenticated Java object deserialization vulnerability exists in the CLI component for Jenkins versions `v2.56` and below.
The `readFrom` method within the `Command` class in the Jenkins CLI remoting component deserializes objects received from clients without first checking / sanitizing the data. Because of this, a malicious serialized object contained within a serialized `SignedObject` can be sent to the Jenkins endpoint to achieve code execution on the target.
Module options
To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':
msf > use exploit/linux/http/jenkins/cli_deserializationmsf undefined(cli_deserialization) > show actions ...actions...msf undefined(cli_deserialization) > set ACTION < action-name >msf undefined(cli_deserialization) > show options ...show and set options...msf undefined(cli_deserialization) > runPrioritise with Active Threat Intelligence
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