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Rancher Server - Docker Exploit

Utilizing Rancher Server, an attacker can create a docker container with the '/' path mounted with read/write permissions on the host server that is running the docker container. As the docker container executes command as uid 0 it is honored by the host operating system allowing the attacker to edit/create files owed by root. This exploit abuses this to creates a cron job in the '/etc/cron.d/' path of the host server. The Docker image should exist on the target system or be a valid image from hub.docker.com. Use `check` with verbose mode to get a list of exploitable Rancher Hosts managed by the target system.

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Module Name

exploit/linux/http/rancher_server

Authors

  • Martin Pizala

Targets

  • Linux

Platforms

  • linux

Architectures

  • x64

Reliability

Development

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/rancher_server msf exploit(rancher_server) > show targets ...targets... msf exploit(rancher_server) > set TARGET <target-id> msf exploit(rancher_server) > show options ...show and set options... msf exploit(rancher_server) > exploit