Headline

CVE-2023-42819: Playbook file uploads cause directory crossing and remote command execution.

JumpServer is an open source bastion host. Logged-in users can access and modify the contents of any file on the system. A user can use the ‘Job-Template’ menu and create a playbook named 'test’. Get the playbook id from the detail page, like 'e0adabef-c38f-492d-bd92-832bacc3df5f’. An attacker can exploit the directory traversal flaw using the provided URL to access and retrieve the contents of the file. https://jumpserver-ip/api/v1/ops/playbook/e0adabef-c38f-492d-bd92-832bacc3df5f/file/?key=../../../../../../../etc/passwd a similar method to modify the file content is also present. This issue has been addressed in version 3.6.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

1 year ago

CVE

Open in Source

#vulnerability

Impact

Logged-in users can access and modify the contents of any file on the system.

The affected versions:
v3.0.0 - v3.6.4

Details

The user ‘foo’ click ‘Job-Template’ menu and create a playbook named 'test’. Get the playbook id from the detail page, like 'e0adabef-c38f-492d-bd92-832bacc3df5f’.

An attacker can exploit the directory traversal flaw using the provided URL to access and retrieve the contents of the file.

https://jumpserver-ip/api/v1/ops/playbook/e0adabef-c38f-492d-bd92-832bacc3df5f/file/?key=../../../../../../../etc/passwd

And It has a similar method to modify the file content.

Patches

Update to safe versions:
v2 version: >= v2.28.20
v3 version: >= v3.7.1

Workarounds

It is recommended to upgrade the safe versions.

After upgrade, visit the api like https://jumpserver-ip/api/v1/ops/playbook/e0adabef-c38f-492d-bd92-832bacc3df5f/file/?key=…/…/…/…/…/…/…/etc/passwd, the expected response content below: