JumpServer up to 3.6.4 path traversal

Summaryinfo

A vulnerability was found in JumpServer up to 3.6.4. It has been classified as critical. This affects an unknown part. This manipulation causes path traversal. This vulnerability is registered as CVE-2023-42819. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in JumpServer up to 3.6.4 and classified as critical. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was published 09/27/2023 as GHSA-ghg2-2whp-6m33. The advisory is shared at github.com. This vulnerability is known as CVE-2023-42819 since 09/14/2023. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 3.6.5 eliminates this vulnerability. Applying the patch d0321a74f1713d031560341c8fd0a1859e6510d8 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• JumpServer

Version

• 3.6.0
• 3.6.1
• 3.6.2
• 3.6.3
• 3.6.4

License

• open-source

Website

• Product: https://github.com/jumpserver/jumpserver/

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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